The present application discloses a retainer and a bearing. The retainer includes a first ring, a second ring and multiple beams connecting the first ring and the second ring. The multiple beams are spaced apart from each other in a circumferential direction of the retainer and a pocket for accommodating a rolling element of a bearing is defined between adjacent beams. The side surface of the beam in the circumferential direction includes a first pressure slope and a second pressure slope spaced apart from each other, and a recessed surface provided at one or two ends of the pocket of the retainer and extending from the first pressure slope towards a longitudinal centerline of the beam and towards a longitudinal end of the beam. The retainer facilitates bearing assembling, avoids the use of large instruments during the assembling, and reduces damage to various components of the bearing during the assembling.
F16C 19/36 - Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers
2.
METHOD, APPARATUS AND DEVICE FOR DETERMINING PITCH OF WIND TURBINE BLADE
A method for determining the pitch of a wind turbine blade. A first sensor (501) is provided on a blade root of a wind turbine, and at least one second sensor (502) is provided on a blade. The method comprises: obtaining a parameter of the current operating condition of a wind turbine, a first angular velocity collected by the first sensor (501) and at least one second angular velocity collected by the at least one second sensor (502); and, on the basis of target simulated blade pitch data, the first angular velocity and the at least one second angular velocity, determining first blade pitch data of the wind turbine, the first blade pitch data being used for representing the blade pitch of the wind turbine under the current operating condition, and the target simulated blade pitch data being matched with the parameter of the current operating condition. Thus, by means of the plurality of sensors mounted on the wind turbine blade and on the basis of the simulated blade pitch data corresponding to the current operating condition combined with the angular velocities collected by the sensors, the method reckons the blade pitch data capable of accurately reflecting the pitch of the wind turbine blade, allowing for more accurate and intelligent control on wind turbines. In addition, the present application further relates to an apparatus and device for determining the pitch of a wind turbine blade.
The present application discloses a stator, a generator, a wind turbine generator set, and an anti-corona treatment method. The stator comprises an iron core and a winding; a plurality of mounting slots are distributed at intervals in the iron core in the circumferential direction; the winding is arranged on the iron core, and the winding comprises a plurality of branches; each branch comprises a plurality of coils; each mounting slot is internally provided with one coil; each coil has end parts protruding out of the iron core on the two sides of the iron core in the axial direction; at least one branch is provided with a potting layer, and the potting layer covers the end parts of some of the plurality of coils of the branches; and the working voltage of some of the coils when the generator works at a rated voltage is greater than a voltage anti-corona threshold.
H02K 3/40 - Windings characterised by the shape, form or construction of the insulation for high voltage, e.g. affording protection against corona discharges
4.
WIND TURBINE AND ENERGY STORAGE COMBINED FREQUENCY REGULATION METHOD, AND WIND TURBINE AND ENERGY STORAGE COMBINED FREQUENCY REGULATION DEVICE
A wind turbine and energy storage combined frequency regulation method and a wind turbine and energy storage combined frequency regulation device are disclosed. The wind turbine and energy storage combined frequency regulation method includes: determining a power increment required to be provided by a wind turbine and energy storage combined system; determining whether a rotor of a wind turbine is controllable; in response to determining that the rotor is controllable, generating a first power increment through a first mixed feedforward and feedback control manner based on the determined power increment; while controlling the rotor, generating a second power increment based on the determined power increment; generating a third power increment through a second mixed feedforward and feedback control manner based on the determined power increment.
A floating wind turbine floating body, a wind turbine generator system and a control method. The floating wind turbine floating body comprises: a main column (220) configured to support a tower (10); first connection bodies (230), wherein a plurality of first connection bodies (230) are arranged at intervals in the circumferential direction of the main column (220) and are separately connected to the main column (220); and auxiliary columns (210), wherein a plurality of auxiliary columns (210) are distributed at intervals in the circumferential direction; the end of each first connection body (230) facing away from the main column (220) is connected to one auxiliary column (210); each auxiliary column (210) has a first static chamber (211) and a first dynamic chamber (213) which are independently provided; a first medium (212) is sealed in the first static chamber (211); each auxiliary column (210) is provided with a first opening (214) and a first control valve (215) which are in communication with the first dynamic chamber (213); and the first control valve (215) controls the opening and closing of the first opening (214), so as to adjust the volume of seawater (219) that enters inside the first dynamic chamber (213). The floating wind turbine floating body has a fast response speed and a good stabilizing effect.
A yaw control method and apparatus, a controller, and a wind turbine generator set. The yaw control method comprises: determining a wind direction deviation value on the basis of the wind-facing direction of an impeller of the wind turbine generator set and an actual incoming flow wind direction; and in response to the absolute value of the wind direction deviation value being greater than a predetermined threshold, and a duration in which the absolute value of the wind direction deviation value is greater than the predetermined threshold being greater than a predetermined time period, controlling the wind turbine generator set to yaw. The yaw control method can improve the generation power of the wind turbine generator set.
The present application relates to a wind turbine foundation, a wind turbine generator system and a control method. The wind turbine foundation can be arranged in seawater and is configured to support a tower. The wind turbine foundation comprises: floating bodies, the number of which is n, the floating bodies being spaced apart from each other, lines for connecting the centers of the floating bodies forming a polygon, and n≥3; and a connection body, which is connected between two adjacent floating bodies, wherein each floating body has a static chamber and a dynamic chamber which are independently provided; a first medium is sealed in the static chamber; each floating body is provided with a first opening and a first control valve, which are in communication with the dynamic chamber; and the first control valve controls the opening and closing of the first opening, so as to adjust the volume of seawater that enters inside the dynamic chamber. In the wind turbine foundation, the wind turbine generator system and the control method provided in the embodiments of the present application, the wind turbine foundation has a fast response speed and a good stabilizing effect.
The present disclosure provides a control method and control apparatus for a voltage source-type wind turbine. The control method comprises: performing a proportional-integral-derivative operation on a deviation between a DC bus voltage measurement value and DC bus voltage reference value of a wind turbine to obtain an active power deviation; determining a virtual angular frequency deviation on the basis of the active power deviation; determining a virtual internal potential phase on the basis of the virtual angular frequency deviation; obtaining a d-axis virtual impedance output and an q-axis virtual impedance output by means of inputting a grid-connected current in a dq coordinate system to a virtual impedance module; on the basis of the virtual angular frequency deviation, a reactive power setting value and reactive power measurement value of the wind turbine, a rated voltage amplitude of a grid, the d-axis virtual impedance output and the q-axis virtual impedance output, determining a d-axis component and q-axis component of a modulation voltage; and controlling an injection voltage of a grid-connected point of the wind turbine according to the virtual internal potential phase and the d-axis component and q-axis component of the modulation voltage.
A wind turbine and energy storage combined inertia response method and a wind turbine and energy storage combined inertia response apparatus are disclosed. The wind turbine and energy storage combined inertia response method includes: determining, in response to detecting a change in a power grid frequency, an inertia response demand power of a wind turbine and energy storage combined system, wherein the wind turbine and energy storage combined system comprises a wind turbine and an energy storage apparatus connected to the wind turbine; and controlling, based on the determined inertia response demand power and by a mixed feedforward and feedback control manner, the energy storage apparatus and a rotor of the wind turbine to generate a power increment.
A method for controlling a pre-tightening force of a bearing in a shaft system, hydraulic tooling (100), a shaft system, and a wind power generator set. The shaft system comprises an inner shaft (10) and an outer shaft (20) rotatably sleeved with each other, a bearing (80) disposed between the inner shaft (10) and the outer shaft (20), and a bearing end cover (50) connected to an end portion of the shaft system. The method for controlling a pre-tightening force of the bearing (80) in the shaft system comprises: a shaft system installation step: sleeving the outer shaft (20) around the inner shaft (10), and installing the bearing (80) between the inner shaft (10) and the outer shaft (20); a pressing force applying step: applying a pressing force to the bearing (80) in an axial direction of the shaft system, the pressing force being approximately equal to a designed pre-tightening force of the shaft system; and a dimension measurement step: measuring a distance S between the bearing (80) and the end portion of the shaft system, so as to configure the bearing end cover (50) according to the distance S. The pre-tightening force of the bearing (80) can be accurately controlled, so that the reliability of the shaft system is improved, and the service life thereof is prolonged.
B23P 19/027 - Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformationTools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same using hydraulic or pneumatic means
11.
COIL, STATOR, FORMING METHODS, GENERATOR, AND WIND TURBINE GENERATOR SYSTEM
The present invention relates to a coil, a stator, forming methods, a generator, and a wind turbine generator system. The coil comprises: a conductor group, which comprises at least one conductive unit; a protective body, which is arranged around the conductor group, wherein the protective body comprises a flow guide mesh and two or more insulating layers which are stacked in a first direction, at least two adjacent insulating layers are provided with a flow guide mesh therebetween, and the sides of the protective body close to and away from the conductor group in the first direction are both provided with insulating layers, the first direction being a direction from the inner side of the protective body facing the conductor group to the outer side of the protective body away from the conductor group; and an insulated connecting body, which is used for fixedly connecting the flow guide mesh and the insulating layers. In the coil provided in the present invention, an insulation structure has a good insulation effect, thus helping to meet the high-voltage development requirement of the generator.
H02K 3/04 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
H02K 3/34 - Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
H02K 3/30 - Windings characterised by the insulating material
H02K 15/10 - Applying solid insulation to windings, stators or rotors, e.g. applying insulating tapes
H02K 15/12 - Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines
H02K 15/085 - Forming windings by laying conductors into or around core parts by laying conductors into slotted stators
Disclosed in the present application are a power generation system and a wind generating set. The power generation system comprises: a gear box which comprises a box body, a gear train, and an output shaft connected to the gear train, wherein the box body comprises a body part and an extension cylinder which are distributed in an axial direction of the output shaft, the gear train is arranged on the body part, and the output shaft is inserted into the extension cylinder in the axial direction and is in running fit with the extension cylinder; a generator which is integrally arranged around the extension cylinder, wherein the generator comprises a rotor and a stator, and the stator is connected to the box body; and an adapter which is arranged at one end of the output shaft and the rotor in the axial direction deviating from the body part, wherein the adapter is connected between the output shaft and the rotor. According to the power generation system and the wind generating set provided by the embodiments of the present application, the power generation system can not only ensure a conversion requirement of electric energy, but also ensure a cost reduction requirement of an apparatus applied by the power generation system.
The present disclosure provides a cooling control method and a cooling control apparatus for a generator of a wind turbine. A cooling device of the generator and an intermittent operation device are connected to a frequency converter, the frequency converter controls the cooling device and the intermittent operation device to start up at different times, and the cooling control method includes: under a condition that a starting condition of the intermittent operation device is determined to be satisfied, calculating a predicted temperature of the generator; under a condition that the predicted temperature is less than or equal to a predetermined threshold temperature, using the frequency converter to control the intermittent operation device to start up to execute the predetermined related action; and using the frequency converter to control the cooling device to start up to cool the generator.
The present disclosure provides a control method, device, and system for a wind turbine set, and a storage medium. The control method comprises: acquiring a preset value of a control parameter and a plurality of historical measurement signals of a wind turbine set in a historical time period; according to the preset value and the plurality of historical measurement signals, determining an estimated distribution parameter of a control signal at a current moment; and determining the control signal at the current moment according to the estimated distribution parameter of the control signal at the current moment.
The present application relates to a combination and a wind turbine set. The combination comprises: a gear box, comprising a box cover, an output shaft and an adapter plate, the output shaft being inserted into the box cover and being rotationally fitted with the box cover, and the adapter plate being connected to one end of the output shaft in its axial direction; a generator, comprising a rotor and a stator which are rotationally fitted with each other, the stator being connected to the box cover, and the rotor and the adapter plate being stacked in the axial direction and being connected to each other; and a current flow guide component, arranged in the generator and located on the side of the generator facing the gear box in the axial direction, the current flow guide component comprising a carbon brush assembly and a connection base, the connection base being arranged on the box cover, and the carbon brush assembly being detachably connected to the connection base and being in electrical contact with the surface of the adapter plate facing the gear box in the axial direction. The embodiments of the present application can ensure the inhibition effect on shaft voltage, thus improving the safety performance of itself.
A service life evaluation method and device for a pitch bearing of a wind turbine are provided. The method includes: acquiring a probability density of a pitch driving torque in M historical periods, wherein M is a positive integer; acquiring an angle cumulative value of a pitch angle in each of the M historical periods; determining an equivalent load of the pitch bearing based on the pitch driving torque, the probability density of the pitch driving torque in the M historical periods, and angle cumulative values in the M historical periods; and determining a consumed service life of the pitch bearing based on the equivalent load of the pitch bearing
The present disclosure provides a method and an apparatus for controlling power of a wind farm. The method includes: acquiring a historical equivalent fatigue load of a target component of each of a plurality of wind turbines; acquiring an entire fatigue load, an equivalent fatigue load of the target component and a pay per unit power generation of each of the plurality of wind turbines at a current moment; determining an optimal power value for at least one of the wind turbines according to the historical equivalent fatigue load, as well as the entire fatigue load, the equivalent fatigue load, and the pay per unit power generation; and adjusting a power value of the at least one of the wind turbines to the optimal power value for the wind turbine.
The present application is applied to a fan control system. Disclosed are a fan channel construction method and apparatus, and a device. Taking a first peripheral system and a second peripheral system among a plurality of peripheral systems as an example, the method comprises: if the first peripheral system successfully applies for a first channel at a first client, receiving first configuration information which is sent by the first client, and if the second peripheral system successfully applies for a second channel at a second client, receiving second configuration information which is sent by the second client; configuring a third channel on the basis of the first configuration information, and configuring a fourth channel on the basis of the second configuration information, wherein parameters of the third channel and parameters of the fourth channel conform to the definition of a peripheral channel of a control system; and communicating with the first channel of the first peripheral system by means of the third channel, and communicating with the second channel of the second peripheral system by means of the fourth channel. In this way, a universal peripheral-channel structure is provided for a plurality of peripheral systems which need to establish a communication connection with a control system, thereby improving the intelligent control level of a fan.
Provided are a variable-pitch control method and device for a wind turbine generator set. The variable-pitch control method comprises: identifying a current wind condition on the basis of operation data and wind parameters of a wind turbine generator set; in response to the current wind condition being a preset wind condition, acquiring an actual pitch angle and a target minimum pitch angle of the wind turbine generator set; setting a minimum pitch angle of the wind turbine generator set on the basis of the actual pitch angle and the target minimum pitch angle; and controlling the operation of the wind turbine generator set on the basis of the minimum pitch angle.
A clearance abnormality detection method for a wind turbine generator set. The method comprises: acquiring, from operation data of a generator set within a predetermined period of time, operation data of when an air speed is within a predetermined air speed range and a power is within a predetermined power range, and dividing the operation data into a plurality of operation data fragments; with regard to each operation data fragment, when a first specified clearance value therein is less than a first preset value and the operation data fragment meets a preset condition, determining the operation data fragment to be a clearance-abnormal fragment; and determining a clearance abnormality of the generator set according to the clearance-abnormal fragment. Further comprised are a clearance abnormality detection apparatus for a wind turbine generator set, and a medium, a system and a wind turbine generator set. The method can effectively solve the problem of it being impossible to predict a clearance risk of a wind turbine generator set in advance.
The present application relates to a blade and a blade connection method. The blade comprises a blade body and connecting members. The blade body comprises two or more blade segments successively arranged in a first direction. Each blade segment comprises a housing and web plates, the housing defines a hollow cavity, the web plates are arranged in the hollow cavity and are connected to the housing, and a fitting surface is provided on the side of the housing facing the hollow cavity. Both ends of each connecting member in the first direction are respectively inserted into two adjacent blade segments; the connecting member comprises a connecting body and a flange; the connecting body is bonded to one side of the corresponding web plate; and the flange is formed by the connecting body outwardly turning towards the side away from the web plate and is bonded to the fitting surface. According to the blade in embodiments of the present application, the area of connection between a connecting member and a blade segment can be increased, thereby ensuring the reliability of blade connection under a large load.
The present application belongs to the field of wind power generation. Disclosed are a wind turbine converter control method, apparatus and device, and a wind turbine system. The method comprises: on the basis of a direct current bus voltage given value and an acquired direct current bus voltage feedback value, obtaining a power control amount; when the power control amount exceeds an energy storage power capability range of an energy storage apparatus, splitting the power control amount into a first power control amount and a second power control amount according to a power capability boundary value of the energy storage power capability range, the first power control amount corresponding to the power capability boundary value; on the basis of the first power control amount, controlling the energy storage apparatus; and determining a first sum of the second power control amount and a machine-side power given value of a machine-side converter as an updated machine-side power given value, and, on the basis of the updated machine-side power given value, controlling the machine-side converter.
A shaft system and a wind generating set. The shaft system comprises a rotating shaft (1), a first bearing seat (2) and a second bearing seat (3), wherein the first bearing seat (2) is arranged at a first end of the rotating shaft (1); the second bearing seat (3) is arranged on the rotating shaft (1) and is spaced apart from the first bearing seat (2), the rotating shaft (1) is rotatably arranged on the first bearing seat (2) and the second bearing seat (3), and a pair of thrust bearings (4) are respectively arranged on two axial sides of the first bearing seat (2). The wind generating set comprises the shaft system. The first bearing seat (2) and the second bearing seat (3) are respectively arranged independently to form split bearing seats, and a single bearing seat has a small size and light weight, so that the shaft system has low costs, and the maintenance of each bearing is simple and convenient.
A converter brake control method, comprising: in response to a wind turbine triggering a fault shutdown, controlling a converter to enter a brake load-reduction mode, wherein the brake load-reduction mode comprises: controlling a brake circuit of the converter to be closed, and controlling the torque at a rectification side of the converter to be reduced to a preset range; in response to meeting a brake load-reduction mode end condition, controlling the converter to exit the brake load-reduction mode; and controlling a safety chain of the converter to be disconnected. When a wind turbine triggers a fault shutdown, the energy consumption of a brake circuit of a converter is controlled and the torque of the converter is controlled to be reduced to a preset range, so that torque support of a shutdown process can be achieved, and the shutdown load of the wind turbine can be reduced. In addition, the present invention also relates to a controller and a wind turbine.
The present application relates to the field of wind power generation, and discloses a grid forming type wind generating set and a control method therefor, and a controller. The grid forming type wind generating set comprises: a generator; a generator-side converter, electrically connected to the generator; a grid-side converter, electrically connected to the generator-side converter by means of a direct-current bus; and an energy storage apparatus, connected to the direct-current bus. A control module in the grid-side converter uses an active power control closed loop and a reactive power control closed loop which are subjected to frequency reduction processing to generate a pulse width modulation signal, and the cutoff frequency of the active power control closed loop and the cutoff frequency of the reactive power control closed loop which are subjected to frequency reduction processing are smaller than or equal to a first preset value; a power switch device in the grid-side converter is switched on or switched off under the control of the pulse width modulation signal, so that a change value of a potential voltage in an output of the grid-side converter in a cutoff period is smaller than or equal to a stable change threshold, and when a power grid frequency is attenuated, the energy storage apparatus passively discharges to provide active power.
The present disclosure provides an anomaly prediction method and apparatus for a wind generating set, and a storage medium. The anomaly prediction method comprises: acquiring topographic data and meteorological data of a machine position of a wind generating set; determining wind-parameter time sequence data by means of large eddy simulation according to the topographic data and the meteorological data; determining set load data according to the wind-parameter time sequence data; and according to the set load data, predicting whether the wind generating set has an anomaly or not. The present disclosure can realize reliable anomaly prediction.
Provided in the present disclosure are a control method and apparatus, and a medium, a controller and a wind generating set. A control method for a voltage-source-type wind generating set comprises: obtaining a phase of a grid-connected-point power-grid voltage of a wind generating set and a grid-connected-point current of same; determining a phase of a virtual internal potential of the wind generating set according to the phase of the grid-connected-point power-grid voltage; obtaining an amplitude of the virtual internal potential of the wind generating set; generating a first modulation signal on the basis of the amplitude and phase of the virtual internal potential; in response to the grid-connected-point current being greater than a first preset threshold value, superposing, to the first modulation signal, a voltage deviation corresponding to a virtual impedance, so as to obtain a second modulation signal; generating a first drive signal on the basis of the second modulation signal; and during short circuiting of a power grid, using the first drive signal to control a grid-side converter of the wind generating set to run.
H02J 3/24 - Arrangements for preventing or reducing oscillations of power in networks
H02J 3/12 - Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
28.
SLIP RING APPARATUS, YAW SYSTEM, AND WIND TURBINE GENERATOR SET
A slip ring apparatus, a yaw system, and a wind turbine generator set are provided. The slip ring apparatus includes a rotating part and a fixed part, the rotating part can rotate relative to the fixed part, a conductive ring is provided on the rotating part, an electric brush is provided on the fixed part, and a chute is formed in at least one of the conductive ring and the electric brush, so that when the conductive ring and the electric brush are in contact, the chute can discharge abrasive dust generated when the conductive ring and the brush are in contact, thereby suppressing the increase of fretting contact resistance between the conductive ring and the electric brush.
Provided are a method and apparatus for determining a representative wind generating set, and a control method and apparatus. The method for determining a representative wind generating set comprises: determining an always-on representative set of each sector; according to working condition parameters of each always-on representative set, identifying wind conditions of the sector where each always-on representative set is located; on the basis of the wind conditions of each sector, selecting, as virtual representative components, set components of a predetermined component type; and on the basis of the virtual representative components of each sector under different wind conditions, constructing virtual representative sets of each sector in different operation modes.
The present application discloses a blade fault diagnosis method, apparatus and system, and a storage medium. the method includes: acquiring a blade rotation audio collected by an audio collection device during operation of a wind turbine generator system; preprocessing the blade rotation audio based on a wind noise filtering algorithm to obtain a blade rotation audio filtered out of wind noise; dividing the blade rotation audio filtered out of wind noise to obtain audio segments corresponding to blades of the wind turbine generator system respectively; diagnosing, based on the audio segments, whether the blades each corresponding to one of the audio segments are faulty. The present application can diagnose whether a corresponding blade is faulty respectively according to the audio segments of different blades, which improves the accuracy of the diagnosis results.
Provided are a rotor (100), a generator (40c), and a wind turbine generator set (400). The rotor (100) comprises a rotor support (1), sealing members (2), and a magnetic pole assembly (3). The rotor support (1) comprises a connecting shaft (11) and a supporting ring (12) arranged around the connecting shaft (11). A first through hole (101) going through in the radial direction of the connecting shaft (11) is formed on the supporting ring (12). Two ends of the supporting ring (12) in the axial direction of the connecting shaft (11) each are provided with a sealing member (2). The sealing members (2), the connecting shaft (11) and the supporting ring (12) are combined to form an air cavity (20) communicated with the first through hole (101). The magnetic pole assembly (3) is connected to the outer peripheral surface of the supporting ring (12) facing away from the connecting shaft (11). The magnetic pole assembly (3) is provided with a first radial channel (1a) extending in the radial direction, and the first radial channel (1a) is communicated with the first through hole (101), wherein a second through hole (102) communicated with the air cavity (20) is formed on one of the two sealing members (2), and when the rotor (100) rotates, external airflow can enter the air cavity (20) from the second through hole (102) and is discharged after sequentially passing through the first through hole (101) and the first radial channel (1a). The rotor (100) can overcome part of the wind friction loss during rotation and improve the cooling and heat dissipation effects.
A control method for a wind turbine, and a related apparatus. On the basis of acquiring in real time an acceleration parameter corresponding to a target wind turbine, whether the target wind turbine meets a wind regime factor determination condition may be determined, wherein the wind regime factor determination condition is used for determining the reason why yaw vibration of the wind turbine exceeds a limit. If the target wind turbine meets the wind regime factor determination condition, it may be determined that an effective acceleration value of the wind turbine exceeds a vibration limit-exceeding threshold value due to a wind regime factor; and if the target wind turbine does not meet the wind regime factor determination condition, it may be determined that the effective acceleration value of the target wind turbine exceeds the vibration limit-exceeding threshold value due to a yaw brake disc system factor. Therefore, the wind turbine may be controlled on the basis of the accurately analyzed reason for exceeding a limit, so as to avoid performing a frequent shutdown operation owing to exceeding a limit due to the wind regime factor, thereby reducing the startup and shutdown frequency of the wind turbine and reducing the losses.
A control method and a control apparatus of a permanent magnet generator are provided, the control method includes: determining an active current reference initial value and a reactive current reference initial value of the permanent magnet generator in a current control period (S110); searching, based on the active current reference initial value and the reactive current reference initial value, and with a target of maximizing a torque-current ratio in the current control period, an optimal active current reference value and an optimal reactive current reference value in the current control period (S120); controlling, based on the optimal active current reference value and the optimal reactive current reference value, the permanent magnet generator to operate (S130); in which the torque-current ratio is calculated based on a torque command value received by the permanent magnet generator from a wind turbine main controller and an output current value of the permanent magnet generator.
A transmission system (1). The transmission system (1) comprises: a gearbox (10), comprising a box body (11), an output shaft (12) and a bearing (13), the output shaft (12) being rotatably connected to the box body (11) by means of the bearing (13); and a generator (20), comprising a rotor (21), a stator and a packaging assembly (22), wherein the stator is connected to the box body (11), the rotor (21) is connected to the output shaft (12), and the packaging assembly (22) comprises a sealing cover (221), a first connector (222) and a second connector (223), the sealing cover (221) being located on the same side of the output shaft (12) and the rotor (21), the sealing cover (221) being fixedly connected to the rotor (21) by means of the first connector (222) and being fixedly connected to the output shaft (12) by means of the second connector (223), the sealing cover (221) being insulated from the first connector (222) and the rotor (21), and the sealing cover (221) being insulated from the second connector (223) and the output shaft (12). Further provided is a wind power generating set. The transmission system can reduce the effect of shaft voltage on the bearing, and has a low cost.
H02K 7/116 - Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
H02K 5/173 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
H02K 5/16 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
H02K 3/34 - Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
35.
TOWER SHEET ASSEMBLY, TOWER SECTION, AND TOWER TRANSPORTATION AND ASSEMBLY METHOD
The present disclosure relates to a tower sheet assembly, a tower section, and a tower transportation and assembly method. The tower sheet assembly comprises a tower sheet, and a foldable platform, which is arranged on an inner side of the tower sheet. The foldable platform comprises a platform main body and a support member. The support member comprises a support seat, wherein a first end of the support seat is fixed to an inner wall of the tower sheet, and a second end of the support seat is hinged to the platform main body at a first hinge point, such that the platform main body can pivot, around the second end of the support seat, between a folded position and an unfolded position.
A cage and a bearing. The cage (2) comprises a first ring (5), a second ring (6), and a plurality of beams (7), which connect the first ring (5) to the second ring (6), wherein the plurality of beams (7) are spaced apart from each other in a circumferential direction of the cage (2), and a pocket (10) for accommodating a rolling element of a bearing is defined between adjacent beams (7). A side surface of each beam (7) in the circumferential direction comprises a first pressed slope (13) and a second pressed slope (15), which are spaced apart from each other, and a recess (12), which is kept in at least one end of the pocket (10) of the cage (2) and extends from the first pressed slope (13) to a longitudinal center line (S) of the beam and to a longitudinal end portion of the beam (7). The cage can facilitate the installation of a bearing, avoid the use of large apparatuses during assembly, and reduce damage to components of the bearing during assembly.
A gear shifting device, comprising a first planetary gear train (100). The first planetary gear train comprises a first ring gear (101), a first planet carrier (102), a first planet gear (103), a sun idler (104), and a planet idler (105); the planet idler and the first planet gear are both installed on the first planet carrier; the first planet gear comprises a pinion (103a) and a bull gear (103b) coaxially connected to the pinion; the planet idler and the pinion are both meshed with the inside of the first ring gear and are both meshed with the outside of the sun idler; the pinion can float in the radial direction relative to the first planet carrier; an input shaft (110) is further provided; one end of the input shaft is connected to the first ring gear. The gear shifting device has a high torque load density, and can achieve a small volume, a large transmission ratio, and a high torque load capacity.
F16H 1/32 - Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
38.
FLOATING GEAR SET, SPEED CHANGE DEVICE AND WIND GENERATING SET
A floating gear set, a speed change device and a wind generating set, wherein the floating gear set comprises a self-aligning shaft assembly and two gears; two ends of the self-aligning shaft assembly in the axial direction are respectively inserted into the two gears; the self-aligning shaft assembly comprises a shaft body and a self-aligning member; the shaft body is in limit connection with the two gears in the circumferential direction by means of the self-aligning member; the shaft body radially swings, by means of the self-aligning member, relative to the two gears. According to the solution, the self-aligning shaft assembly can radially swing relative to the two gears, and in this way, the two gears can be misaligned with each other in the radial direction and can be in a connected state in which the two gears can float in the radial direction, so that a transmission path of a torque can be conveniently changed, so as to better realize torque distribution, and the torque density of a planetary gear mechanism can be improved especially when the solution is applied to the planetary gear mechanism.
F03D 15/10 - Transmission of mechanical power using gearing not limited to rotary motion, e.g. with oscillating or reciprocating members
F16D 3/20 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
A power generation assembly and a wind turbine. The power generation assembly comprises a gearbox (10), a power generator (20) and a bypass current suppression module (30); the gearbox (10) comprises a box body (11), a box body end cover (12) provided at the end of the box body (11), and an output shaft (13); the box body end cover (12) is provided with a shaft hole; the output shaft (13) is rotatably supported in the shaft hole; the power generator (20) comprises a rotor (21); the rotor (21) is fixed to the output shaft (13) by means of a rotor support (23); the bypass current suppression module (30) is used for suppressing stray current of the output shaft (13); the bypass current suppression module (30) comprises a friction disc (31) and a conductive structure (32); the friction disc (31) is fixed to the box body end cover (12); the conductive structure (32) is provided on the rotor support (23); the conductive structure (32) can be electrically connected to the friction disc (31).
A mesoscale data-based automatic wind turbine layout method and device. The method comprises: initially screening an input wind field region on the basis of input mesoscale wind map data by means of a wind speed limit value to obtain a first wind field region; re-screening the first wind field region on the basis of input terrain data by means of a slope limit value to obtain a second wind field region; and determining, by means of tabu search in which a target wind turbine count and the second wind field region are used as inputs, a wind turbine layout that optimizes an objective function, wherein the objective function is the sum of the annual energy production for wind turbine locations.
The application discloses coils of an electrical machinery and a method for forming the coil, a stator of an electrical machinery and a method for forming the stator, and an electrical machinery. The method includes: providing a first conductor and a second conductor, a resistivity of the second conductor being lower than a resistivity of the first conductor; obtaining a rated current rising coefficient according to a desired power of the electrical machinery, the rated current rising coefficient being a ratio of a rated current of the electrical machinery with the desired power to a rated current of a reference electrical machinery; obtaining, according to the rated current rising coefficient, a first conductor turn number of the first conductor and a second conductor turn number of the second conductor in each coil; forming the coil according to the first conductor turn number and the second conductor turn number.
H02K 15/04 - Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of windings prior to their mounting into the machines
Provided are a capacitor bank (10), a converter (1), a wind generating set, and a forming method for the capacitor bank (10). The capacitor bank (10) comprises: core groups (110), comprising a plurality of capacitor cores (111) sequentially disposed in a first direction (X), the quantity of the core groups (110) being more than one, the core groups (110) being disposed in an insulated manner, and an insertion cavity (11a) being formed between at least two core groups (110); a radiator (120), located in the insertion cavity (11a) and insulated from the core groups (110), the radiator (120) having a cooling cavity (121) and an inlet (122) and an outlet (123) communicated with the cooling cavity (121), and cooling liquid entering the cooling cavity (121) from the inlet (122), performing heat exchange with the capacitor cores (111), and then being discharged from the cooling cavity (121) through the outlet (123). According to the provided capacitor bank (10), the converter (1), the wind generating set, and the forming method for the capacitor bank (10), the capacitor bank (10) can stabilize the voltage of a direct-current bus, and the capacitor bank (10) has good heat dissipation, so that the service life of the capacitor cores (111) can be ensured.
A method, an apparatus, and a system for monitoring an islanding electricity generation unit are provided. The method includes determining an islanding electricity generation unit in a renewable energy station on the basis of collected electrical capacity at critical electrical nodes of the renewable energy station, and controlling a switch device corresponding to the determined islanding electricity generation unit to sever connection between the electricity generation unit and a collector line. The critical electrical nodes include nodes that have a collecting effect on grid-connected current of the electricity generation units of the renewable energy station, and each collector line being constructed to collect grid-connected current from at least one electricity generation unit and input same into a main transformer of the renewable energy station.
H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
H02J 13/00 - Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the networkCircuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
H02J 3/46 - Controlling the sharing of output between the generators, converters, or transformers
44.
Wind turbine generator system, and rotation speed avoidance control method and apparatus therefor
A rotation speed exclusion control method for a wind turbine generator system. The method comprises: when a power-limited operation instruction is received, determining a power value upper limit required by the instruction; determining that the required power value upper limit is in a power exclusion interval corresponding to a rotation speed exclusion interval; and when the required power value upper limit is in the power exclusion interval, setting the maximum allowable power value of a wind turbine generator system to be a lower boundary value of the power exclusion interval.
A wind turbine generator system and a rotation speed avoidance control method therefor. The method comprises: according to statistical information of the rotation speed of a generator being in a rotation speed avoidance interval, identifying whether a wind turbine generator system repeatedly falls within the rotation speed avoidance interval; and when it is determined that the wind turbine generator system repeatedly falls within the rotation speed avoidance interval, adjusting a rotation speed avoidance control parameter of the wind turbine generator system according to the statistical information of the rotation speed being in the rotation speed avoidance interval. Correspondingly, further provided is a rotation speed avoidance control apparatus for a wind turbine generator system.
The present application provides a wind turbine and a converter filter capacitor switching control method, device and system therefor. The method includes: acquiring a contactor delay influence factor of the converter and an approximate zero voltage period of the power grid connected to the wind turbine, wherein an absolute value of a voltage of the power grid in the approximate zero voltage period is less than an approximate zero voltage threshold; obtaining a contactor delay duration according to the contactor delay influence factor, wherein the contactor delay duration is a duration from when the contactor receives a switching instruction to when the contactor is switched on or off; determining a switching time point of the filter capacitor based on the approximate zero voltage period and the contactor delay duration; transmitting the switching instruction to the contactor when the switching time point is reached.
Provided is a control method for an energy storage device, which is electrically connected to a direct current bus of a converter of a wind power generator unit. The method comprises: determining whether a wind power generator unit is in a power generation state; and in response to the determination that the wind power generator unit is in the power generation state, controlling output power of an energy storage device, such that an actual power curve of the wind power generator unit tracks a target power curve. Further provided are a control device for an energy storage device, a computer-readable storage medium, a controller and a wind power generator unit.
Provided in the present disclosure are a method and apparatus for evaluating the service life of a wind power generator set. The method comprises: acquiring historical data of a generator set; classifying historical operation data and other data in the historical data into corresponding operation state categories; determining a first proportion of each operation state category according to time information corresponding to the historical operation data; according to the historical data, determining an equivalent fatigue load corresponding to each operation state category; on the basis of the first proportion, superimposing the equivalent fatigue load corresponding to each operation state category, so as to obtain an equivalent fatigue load of the generator set; and determining the consumed service life of the generator set according to the equivalent fatigue load of the generator set.
Disclosed in the present application are a method and apparatus for adjusting a reactive power in a wind farm, and an electronic device. The method for adjusting a reactive power in a wind farm comprises: acquiring wind-farm reactive power control parameters, which are sent to a wind farm by a power grid; according to the wind-farm reactive power control parameters, calculating an average reactive power control parameter of a single generator set in the wind farm; according to a difference value between a grid-connection point voltage of each generator set and a preset voltage limit value, correcting the average reactive power control parameter of the corresponding generator set, so as to obtain a single generator-set reactive power control parameter of the corresponding generator set; and outputting, to each generator set, the single generator-set reactive power control parameter of the corresponding generator set.
H02J 3/50 - Controlling the sharing of the out-of-phase component
H02J 3/16 - Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
50.
CLEARANCE MONITORING SYSTEM OF WIND TURBINE SET, AND MONITORING METHOD AND DEVICE
A clearance monitoring system of a wind turbine, and a monitoring method and device are provided. The clearance monitoring system includes a processor and a millimeter wave radar in communication connection to the processor. The millimeter wave radar is installed on a left side portion of a nacelle of the wind turbine. The millimeter wave radar points to a movement area of the impeller and is used for monitoring movement data of each blade on the impeller in the movement area. The processor is used to receive the movement data. According to the movement data, blade clearance between each blade and a tower of the wind turbine is determined.
Provided in the present disclosure are a cooling control method and apparatus for a generator of a wind turbine generator set. A cooling device of the generator and an intermittent operation device of the wind turbine generator set are connected to the same frequency converter, and the frequency converter controls the cooling device and the intermittent operation device to start at different times. The cooling control method for a generator comprises: when it is determined, according to operation data of a wind turbine generator set, that a startup condition of an intermittent operation device is met, calculating a predicted temperature of a generator after a required duration for controlling, by using a frequency converter, the intermittent operation device to start so as to execute a predetermined relevant action; when the predicted temperature is less than or equal to a predetermined threshold temperature, controlling, by using the frequency converter, the intermittent operation device to start so as to execute the predetermined relevant action; and after the intermittent operation device executes the predetermined relevant action, controlling, by using the frequency converter, a cooling device to start so as to cool the generator.
A support device (1) and a wind generating set. The support device is used for the wind generating set, and the wind generating set comprises an electrical apparatus (3). The support device comprises: a support frame (10) which is of a hollow frame structure and comprises a plurality of beam structures (11), wherein the adjacent beam structures are connected to each other, and a relative position between at least one set of two beam structures with a connection relationship is adjustable; and a support platform (20) arranged on one surface of the support frame in a height direction of the support frame and connected to the beam structure, wherein the support platform is used for supporting the electrical apparatus. The device can be used for supporting the electrical apparatus of the wind generating set, and at the same time, the size and/or bearing capacity can be changed according to apparatus requirements, and a better universality is achieved.
A damping integrated device, a damper, and a wind turbine are provided. The damping integrated device includes: a base body including an inner cavity extending in the lengthwise direction thereof; a frequency adjustment component disposed in the inner cavity and including an elastic member and a connecting member; a first connector extending into the inner cavity and at least partially protruding out of the base body in the lengthwise direction, the first connector being capable of moving relative to the base body, to make the elastic member stretch or shrink in the lengthwise direction; and a damping component disposed in the inner cavity, being connected to the connecting member and at least partially abutting against an inner wall of the base body, and the damping component being configured to absorb kinetic energy of the first connector.
Provided are a control method and apparatus for load reduction of a wind turbine. The control method for load reduction includes: determining a representative blade root load value of a wind turbine; determining an additional pitch rate value based on the representative blade root load value; determining a pitch rate control value based on a given pitch rate value and the additional pitch rate value; and applying the pitch rate control value to each blade of the wind turbine, to control each blade of the wind turbine to perform a pitch action.
The present disclosure provides a method and device for evaluating the service life of a pitch bearing of a wind turbine. The method comprises: acquiring the probability density of pitch driving torque in M historical time periods; acquiring a cumulative angle value of a pitch angle in each of the M historical time periods; according to the pitch driving torque, the probability density thereof in the M historical time periods and the cumulative angle value in the M historical time periods determining the equivalent load of a pitch bearing; and, according to the equivalent load of the pitch bearing, determining the expended service life of the pitch bearing.
Methods and Apparatuses for rotational speed avoidance control of a wind turbine, and the wind turbine are provided. An exemplary method includes: identifying whether a wind turbine operates repeatedly traversing a rotational speed avoidance range, based on statistical information about a rotational speed of a generator being in the rotational speed avoidance range; and adjusting a parameter of a pitch control system and/or a parameter of an electromagnetic torque control of the wind turbine based on the statistical information about the rotational speed being in the rotational speed avoidance range, in response to determining that the wind turbine operates repeatedly traversing the rotational speed avoidance range.
The present disclosure provides a power control method and device for a wind farm. The method comprises: obtaining historical equivalent fatigue loads of target components of multiple wind power generator sets; obtaining overall fatigue loads of the multiple wind power generator sets, equivalent fatigue loads of the target components and unit power consumption at a current time point; determining a tuned power value of at least one wind power generator set according to the historical equivalent fatigue loads, the overall fatigue loads, the equivalent fatigue loads, and the unit power consumption; and adjusting the power value of the at least one wind power generator set to the corresponding tuned power value.
A hybrid damping module, a vibration suppression device, a vibration suppression method and a wind turbine are provided. The hybrid damping module includes a first damping unit and second damping unit. The first damping unit includes a rotor portion and a stator portion provided parallel to the rotor portion. The rotor portion is configured to rotate relative to the stator portion so as to generate electromagnetic damping. A flow passage is formed in at least one of the rotor portion and the stator portion. The second damping unit includes a liquid damper. The liquid damper communicates with the flow passage and forms a circulation loop, and a liquid in the liquid damper can cyclically flow in the circulation loop.
F16F 15/03 - Suppression of vibrations of non-rotating, e.g. reciprocating, systemsSuppression of vibrations of rotating systems by use of members not moving with the rotating system using electromagnetic means
F16F 15/027 - Suppression of vibrations of non-rotating, e.g. reciprocating, systemsSuppression of vibrations of rotating systems by use of members not moving with the rotating system using fluid means comprising control arrangements
59.
Control circuit of NPC-type three-level converter, NPC-type three-level converter and wind power generator set
A control circuit for an NPC-type three-level converter is provided. Each phase bridge arm of the NPC-type three-level converter includes multiple IGBT devices. For each phase bridge arm, a control circuit corresponding to the phase bridge arm includes an off-time control circuit and a timing control circuit. The off-time control circuit is configured to reserve a preset time period for turn-off of the multiple IGBT devices in the corresponding phase bridge arm. The timing control circuit includes a first sub-circuit and a second sub-circuit, and each sub-circuit of the first sub-circuit and the second sub-circuit includes: a first fixed delay circuit, a second fixed delay circuit, a first AND gate circuit and a first OR gate circuit. For each sub-circuit, output terminals of the first AND gate circuit and the first OR gate circuit serve as output terminals of the timing control circuit, respectively.
H02M 1/084 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters using a control circuit common to several phases of a multi-phase system
H02M 7/5387 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
60.
Power component of three-level converter, three-level converter and wind turbine
The present application provides a power component of a three-level converter, a three-level converter and a wind turbine. The power component of the three-level converter includes: a first NPC bridge arm unit including a plurality of first NPC bridge arms connected in parallel; a second NPC bridge arm unit including a plurality of second NPC bridge arms connected in parallel; and a third NPC bridge arm unit including a plurality of third NPC bridge arms connected in parallel. The number of the second NPC bridge arms is the same as the number of the first NPC bridge arms, and the number of the third NPC bridge arms is determined based on the ratio of the loss of the first NPC bridge arm to the loss of the third NPC bridge arm.
H02M 7/00 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output
H02M 7/5387 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
A damping device and a wind turbine generator system comprising the damping device. The damping device comprises: damping components; structural supports, the structural supports connecting the damping components to a mass block provided on an object to be damped, each structural support comprising a gear, and the gear being rotatably provided on the structural support; and guide rails, wherein each guide rail has a predetermined curvature, each guide rail has a first end used for being rotatably connected to the object to be damped and a second end supported on the corresponding structural support, a tooth portion engaged with a gear is formed on a side portion of each guide rail, and when the mass block swings, the swing of the mass block is converted into transmission by means of the engagement transmission between the guide rail and the gear for input into the corresponding damping component.
A magnetic pole module and a rotor for a permanent magnet generator are provided. The magnetic pole module includes a base plate having a first surface and a second surface arranged opposite to each other, the base plate has a first center line extending in the first direction and a second center line extending in the second direction, the first direction is intersected with the second direction, the first center line is parallel to the central axis of the permanent magnet generator; at least one pair of magnetic steel components is fixed on the base plate, and each pair of magnetic steel components is symmetrically arranged on the first surface with respect to the second center line, each magnetic steel component includes multiple magnetic steels arranged side by side along a side of the first direction from the second center line and arranged at a predetermined angle in the second direction.
H02K 29/03 - Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
A stator assembly, an electrical motor having the stator assembly, a wind power generator set and a method for cooling a stator assembly are provided. The stator assembly includes a stator support and a stator core mounted on the stator support, wherein the stator support includes a support enclosure plate, a first axial air flow channel is fonned between the support enclosure plate of the stator support and a radial side surface of the stator core, and the first axial air flow channel is used for receiving a first cold air flow, so that the cold air flow can flow in the axial direction. The stator assembly can introduce a cold air flow from the other side, opposite an air gap, of a stator during the operation of an electrical motor, so that two radial sides of the stator can be cooled at the same time.
H02K 1/20 - Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
H02K 9/10 - Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing
H02K 9/22 - Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
64.
WIND-STORAGE COMBINED FREQUENCY REGULATION METHOD AND WIND-STORAGE COMBINED FREQUENCY REGULATION APPARATUS
A wind-storage combined frequency regulation method and a wind-storage combined frequency regulation apparatus. The wind-storage combined frequency regulation method comprises: determining a power increment that needs to be provided by a wind-storage combined system; determining whether a rotor of a wind turbine is controllable; in response to the rotor being controllable, generating a first power increment by means of a first feedforward-feedback control mode on the basis of the determined power increment; generating a second power increment on the basis of the determined power increment while controlling the rotor; and generating a third power increment by means of a second feedforward-feedback control mode on the basis of the determined power increment.
Disclosed are a wind-storage integrated inertia response method and apparatus. The wind-storage integrated inertia response method comprises: in response to detecting that a power grid frequency changes, determining an inertia response demand power of a wind-storage integrated system, wherein the wind-storage integrated system comprises a wind generating set and an energy storage apparatus, which is connected to the wind generating set; and controlling rotors of the energy storage apparatus and the wind generating set on the basis of the determined inertia response demand power and by means of feedforward and feedback control, so as to generate a power increment.
A power control method for a wind generating set, comprising: acquiring an ambient temperature, rotational speed, and pitch angle of the wind generating set during running (S101); determining electrical boundary power of the wind generating set according to the ambient temperature and the rotational speed (S102); determining stall boundary power of the wind generating set according to the ambient temperature, the rotational speed, and the pitch angle (S103); determining set power of the wind generating set according to the electrical boundary power and the stall boundary power of the wind generating set (S104); and controlling output of the wind generating set according to the set power (S105). The set power of the set is adjusted according to the ambient temperature, the electric generating capacity is improved when the temperature is low, and the safety of the set is ensured when the temperature is high, thereby improving the competence of the set. Also involved are a power control device for a wind generating set, a computer readable storage medium, a computing device, and a computer program product.
A method and an apparatus for measuring a headroom value of a wind power generator (110). A target image obtained by an image acquisition device (120) photographing the wind power generator (110) can be obtained first, and blades (111) and a tower (112) of the wind power generator are then detected from the target image to obtain a first edge and a second edge of the tower (112) and a tip point of each blade (111). Then, a tower pixel width from the first edge to the second edge on a plane where the tip point is located can be determined, and a headroom pixel distance from the tip point to a target edge on the plane where the tip point is located can be determined. The target edge is the one of the first edge and the second edge which is closer to the blade. After the tower pixel width and the headroom pixel distance are determined, an actual headroom value of the wind power generator can be determined according to the tower pixel width and the headroom pixel distance. In this way, the actual distance of the wind power generator can be accurately calculated.
The present disclosure provides a control method and control apparatus for a voltage source-type wind turbine. The control method comprises: performing a proportional-integral-derivative operation on a deviation between a DC bus voltage measurement value and DC bus voltage reference value of a wind turbine to obtain an active power deviation; determining a virtual angular frequency deviation on the basis of the active power deviation; determining a virtual internal potential phase on the basis of the virtual angular frequency deviation; obtaining a d-axis virtual impedance output and an q-axis virtual impedance output by means of inputting a grid-connected current in a dq coordinate system to a virtual impedance module; on the basis of the virtual angular frequency deviation, a reactive power setting value and reactive power measurement value of the wind turbine, a rated voltage amplitude of a grid, the d-axis virtual impedance output and the q-axis virtual impedance output, determining a d-axis component and q-axis component of a modulation voltage; and controlling an injection voltage of a grid-connected point of the wind turbine according to the virtual internal potential phase and the d-axis component and q-axis component of the modulation voltage.
A wind turbine control method, apparatus, and system, a device and a medium. A wind turbine comprises a yaw slip ring. The method comprises: acquiring operating state parameters of the yaw slip ring; according to the operating state parameters and determination conditions of a plurality of types of faults, determining at least one type of fault among the plurality of types of faults occurring in the yaw slip ring; and controlling the operating state of the wind turbine according to a fan control strategy corresponding to the at least one type of fault. The control method is capable of taking into consideration both the power generation efficiency of the wind turbine and the operation safety of the yaw slip ring.
A filtering device, a generator and a wind turbine generator system are provided. The filtering device comprises a force-bearing cover plate, a surrounding plate, a first filter screen structure, a second filter screen structure and a filter cartridge; the force-bearing cover plate and the surrounding plate enclose an accommodation space for filling the filter cartridge, the surrounding plate forming at least a part of a side wall of the accommodation space; the first filter screen structure is provided on an upper side of the filter cartridge, is located on a lower side of the force-bearing cover plate, and substantially covers an upper side surface of the filter cartridge; and the second filter screen structure is provided at a lower side of the filter cartridge, and covers a lower side surface of the filter cartridge.
B01D 46/10 - Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
B01D 46/00 - Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
B01D 46/30 - Particle separators, e.g. dust precipitators, using loose filtering material
B01D 46/62 - Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
A method and a control device for adjusting active power of a wind farm, and a controller of a wind farm are provided. The method includes: acquiring an active power increment to be adjusted in the wind farm; determining an active power adjustable amount of the wind farm based on active power adjustable amounts of wind turbines in the wind farm; and determining an active power adjustment amount of each of the wind turbines based on the active power increment to be adjusted in the wind farm and the active power adjustable amount of the wind farm, to adjust active power of each of the wind turbines.
The present disclosure relates to a method for assembling a large-diameter electric motor, the method includes: a preparing step: providing two or more stator segments for forming a stator and two or more rotor support segments for forming a rotor support; a splicing step: splicing the two or more stator segments and the two or more rotor support segments in a predetermined manner to form the stator and the rotor support that are coaxially assembled, respectively, and maintaining a predetermined gap between the stator and the rotor support in a radial direction; and an assembling step: inserting a plurality of magnetic pole modules into the predetermined gap, and assembling the plurality of magnetic pole modules to a mounting surface of the rotor support.
H02K 15/03 - Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
A feedforward control method includes: acquiring, by means of a remote sensing measurement apparatus, inflowing wind information of a plurality of spatial point positions in front of a wind turbine, wherein the plurality of spatial points are distributed in a plurality of different cross sections, and the distances between the plurality of different cross sections and the wind turbine are different; combining the acquired inflowing wind information into a target wind velocity; predicting, on the basis of the combined target wind velocity, incoming flow arrival time required for inflowing wind at a target point to arrive at an impeller plane; and performing feedforward control on the wind turbine according to the predicted incoming flow arrival time.
The disclosure relates to an electric machine and an assembling method for an electric machine. The electric machine includes: a shaft assembly including a first shaft, a second shaft coaxially disposed within an inner circumference of the first shaft, and a bearing disposed between the first shaft and the second shaft; a first revolving body coaxially connected to the first shaft, wherein the first revolving body includes an annular first adapter bracket, and a tubular structural portion extending in an axial direction is disposed at an inner circumference of the first adapter bracket; a second revolving body coaxially connected to the second shaft and disposed around an outer circumference of the first revolving body; and a guiding assembly disposed between the tubular structural portion and the first shaft to restrict a movement of the first revolving body relative to the first shaft in a circumferential direction and a radial direction.
The present disclosure relates to a stator support and a stator. The stator support is applied to a large-diameter electric motor. The stator support includes a stator shaft, coaxially connectable to a fixing shaft of the electric motor; a supporting assembly, coaxially arranged at an outer circumference of the stator shaft; a stator ring, connectable to a stator iron core of the electric motor, in which the stator ring includes two or more stator ring segments continuously distributed in a circumferential direction of its own, each of the stator ring segments is in a sector shape, and the two or more stator ring segments are coaxially arranged at an outer circumference of the supporting assembly.
H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
H02K 7/00 - Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
76.
SLIP RING APPARATUS, YAW SYSTEM, AND WIND TURBINE GENERATOR SET
The present invention provides a slip ring apparatus, a yaw system, and a wind turbine generator set. The slip ring apparatus comprises a rotating portion and a fixed portion, the rotating portion can rotate relative to the fixed portion, a conductive ring is provided on the rotating portion, an electric brush is provided on the fixed portion, and a chute is formed in at least one of the conductive ring and the electric brush, so that when the conductive ring and the electric brush are in contact, the chute can discharge abrasive dust generated when the conductive ring and the brush are in contact, thereby suppressing the increase of micro contact resistance between the conductive ring and the electric brush.
Disclosed in the present application are a blade fault diagnosis method, apparatus and system, and a storage medium. The method comprises: obtaining a blade rotation audio acquired by an audio acquisition device in an operation process of a wind turbine; preprocessing the blade rotation audio on the basis of a wind noise filtering algorithm to obtain a blade rotation audio subjected to wind noise filtering; splitting the blade rotation audio subjected to wind noise filtering, to obtain an audio clip corresponding to each blade; and diagnosing, according to each audio clip, whether the blade corresponding to each audio clip is faulty. According to the present application, on the basis of the audio clips of different blades, whether the corresponding blades are faulty can be respectively diagnosed, thereby improving the accuracy of diagnosis results.
The present invention provides a slip ring apparatus, a yaw system, and a wind turbine generator set. The slip ring apparatus comprises a rotating portion and a fixed portion, the rotating portion can rotate relative to the fixed portion, a conductive ring is provided on the rotating portion, an electric brush is provided on the fixed portion, and a chute is formed in at least one of the conductive ring and the electric brush, so that when the conductive ring and the electric brush are in contact, the chute can discharge abrasive dust generated when the conductive ring and the brush are in contact, thereby suppressing the increase of micro contact resistance between the conductive ring and the electric brush.
A method for identifying an abnormality in start and stop of a wind generator set. The method for identifying the abnormality in start and stop of the wind generator set comprises: S11, obtaining the operation data of the wind generator set within a preset time period; S12, determining the number of times of the start and stop of the wind generator set within each preset time interval in the preset time period according to the operation data, wherein the number of times of the start and stop within each preset time interval represents the sum of the number of times of the start of the wind generator set and the number of the times of the stop of the wind generator set within the corresponding preset time interval; and S13, identifying the abnormality in the start and stop of the wind generator set according to the number of times of the start and stop. The present disclosure further relates to a device for identifying an abnormality in start and stop of a wind generator set, a computer readable storage medium storing a computer program, and a computing device. The method for identifying the abnormality in start and stop facilitates the intuitive observation of the distribution of the number of times of the start and stop of the wind generator set with respect to an average wind speed, and can easily identify the abnormality in start and stop.
Disclosed in the present application are a blade fault diagnosis method, apparatus and system, and a storage medium. The method comprises: obtaining a blade rotation audio acquired by an audio acquisition device in an operation process of a wind turbine; preprocessing the blade rotation audio on the basis of a wind noise filtering algorithm to obtain a blade rotation audio subjected to wind noise filtering; splitting the blade rotation audio subjected to wind noise filtering, to obtain an audio clip corresponding to each blade; and diagnosing, according to each audio clip, whether the blade corresponding to each audio clip is faulty. According to the present application, on the basis of the audio clips of different blades, whether the corresponding blades are faulty can be respectively diagnosed, thereby improving the accuracy of diagnosis results.
Provided are a drive system and a wind turbine generator unit; a drive system (1) comprises a shaft structure (10) and a loading structure (20); the shaft structure (10) comprises a movable shaft (11), a fixed shaft (12), and a bearing set (13); the movable shaft (11) is arranged coaxially with the fixed shaft (12) and is rotationally connected by means of the bearing set (13); the loading structure (20) is arranged at one end of the movable shaft (11) in the axial direction and is rotationally connected to the movable shaft (11); the loading structure (20) is used for applying a force to the movable shaft (11), and the direction of application of the acting force intersects the axial direction; the wind turbine generator unit comprises a nacelle (2), a drive system (1), a generator (3), and a turbine wheel (4); the drive system (1) is capable of kinetic energy transfer, ensuring the power generation needs of the wind turbine generator unit, and also is capable of reducing damage to the bearing set (13), improving the overall service life of the drive system (1).
Provided are a method for controlling a permanent magnet motor and a control device. Said control method comprises: determining an active current reference initial value and a reactive current reference initial value of a permanent magnet motor within the current control period (S110); on the basis of the active current reference initial value and the reactive current reference initial value, and taking the maximum torque current ratio within the current control period as a target, searching for an optimal active current reference value and reactive current reference value within the current control period (S120); and controlling, on the basis of the optimal active current reference value and reactive current reference value, the permanent magnet motor to operate (S130); wherein the torque current ratio is calculated on the basis of a torque command value received by the permanent magnet motor from a fan main controller and an output current value of the permanent magnet motor.
The present application relates to a tower tube section, a tower frame and a wind power generator set. The tower tube section includes a tower tube section body; a reinforcing assembly including a supporting member connected to the tower tube section body and a plurality of reinforcing cables connected to the supporting member. The plurality of reinforcing cables are arranged at intervals along a circumferential direction of the tower tube section body, and each of the plurality of reinforcing cables extends along an axial direction of the tower tube section body and is apart from a periphery surface of the tower tube section body by a predetermined distance in a radial direction of the tower tube section body. The tower tube section has a strong bearing capacity and low cost, which can meet the power generation benefits of the wind power generator set.
A wind power generating set safety chain system, a monitoring method, a variable pitch controller and a wind power generating set. The wind power generating set safety chain system comprises variable pitch cabinets (41) and a first safety chain (50). Each variable pitch cabinet (41) is internally provided with a variable pitch controller (42); the first safety chain (50) comprises first relays (51) corresponding to the variable pitch cabinets (41), each first relay (51) comprising a first coil (511) and a first contact (512), the first contact (512) being connected to the variable pitch controller (42); the variable pitch controller (42) obtains a first voltage signal of a power supply line of the first coil (511) by means of a first monitoring input port; and under the condition that the first voltage signal is a high-level signal, the wind power generating set continues operating for at least a period of time, thereby improving the accuracy of safety monitoring of a safety chain of the wind power generating set, and avoiding power generation loss caused by the shutdown of the wind power generating set due to misjudgment.
H01H 47/00 - Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
85.
POWER ASSEMBLY OF THREE-LEVEL INVERTER, THREE-LEVEL INVERTER, AND WIND TURBINE
The present application discloses a power assembly of a three-level inverter, the three-level inverter, and a wind turbine. The power assembly of the three-level inverter comprises: a first NPC bridge arm unit, the first NPC bridge arm unit comprising multiple first NPC bridge arms which are connected in parallel; a second NPC bridge arm unit, the second NPC bridge arm unit comprising multiple second NPC bridge arms which are connected in parallel; and a third NPC bridge arm unit, the third NPC bridge arm unit comprising multiple third NPC bridge arms which are connected in parallel; wherein the number of the second NPC bridge arms is the same as that of the first NPC bridge arms, and the number of the third NPC bridge arms is determined according to a loss ratio of the first NPC bridge arms to the third NPC bridge arms. According to embodiments of the present application, loss of each NPC bridge arm unit of the three-level inverter can be balanced, so that IGBT device loss of the three-level inverter is uniformly distributed.
The present application discloses a power assembly of a three-level inverter, the three-level inverter, and a wind turbine. The power assembly of the three-level inverter comprises: a first NPC bridge arm unit, the first NPC bridge arm unit comprising multiple first NPC bridge arms which are connected in parallel; a second NPC bridge arm unit, the second NPC bridge arm unit comprising multiple second NPC bridge arms which are connected in parallel; and a third NPC bridge arm unit, the third NPC bridge arm unit comprising multiple third NPC bridge arms which are connected in parallel; wherein the number of the second NPC bridge arms is the same as that of the first NPC bridge arms, and the number of the third NPC bridge arms is determined according to a loss ratio of the first NPC bridge arms to the third NPC bridge arms. According to embodiments of the present application, loss of each NPC bridge arm unit of the three-level inverter can be balanced, so that IGBT device loss of the three-level inverter is uniformly distributed.
A hybrid damping module, a vibration suppression device, a vibration suppression method, and a wind turbine set. The hybrid damping module comprises a first damping unit (8). The first damping unit (8) comprises a rotor portion (8a) and a stator portion (8b) that is provided parallel to the rotor portion (8a). The rotor portion (8a) is configured to capable of rotating relative to the stator portion (8b) so as to generate electromagnetic damping. A flow passage is formed in at least one of the rotor portion (8a) and the stator portion (8b). The hybrid damping module comprises a second damping unit (10) comprising a liquid damper. The liquid damper communicates with the flow passage and forms a circulation loop. A liquid (10p) in the liquid damper can cyclically flow in the circulation loop. In the hybrid damping module, a combined vibration suppression solution that combines a TMD and TLD is provided. By means of using a TMD and TLD in combination, the vibration suppression effect of the hybrid damping module can be increased. Furthermore, the problem of the attenuation of damping force caused by increasing temperature in a permanent magnet eddy current damping device is addressed.
F16F 15/023 - Suppression of vibrations of non-rotating, e.g. reciprocating, systemsSuppression of vibrations of rotating systems by use of members not moving with the rotating system using fluid means
F16F 15/03 - Suppression of vibrations of non-rotating, e.g. reciprocating, systemsSuppression of vibrations of rotating systems by use of members not moving with the rotating system using electromagnetic means
88.
WIND TURBINE GENERATOR, AND MINIMUM ROTATIONAL SPEED CONTROL METHOD AND DEVICE THEREFOR
A wind turbine generator, and a minimum rotational speed control method therefor. The method comprises: identifying, according to statistical information obtained when rotational speeds of generators are in respective minimum rotational speed intervals, whether or not a wind turbine generator has repeatedly entered a minimum rotational speed interval; and if so, adjusting, according to the statistical information obtained when the rotational speeds are in the minimum rotational speed intervals, a pitch control system parameter and/or an electromagnetic torque control parameter of the wind turbine generator. The method can avoid abnormalities caused to a generator when same repeatedly enters a minimum rotational speed interval. The present invention further relates to a control device for implementing the above control method.
A wind turbine generator group, and a converter filter capacitor switching control method, apparatus, and system therefor, which relate to the field of wind power generation. The method comprises: acquiring a contactor delay influence factor of a converter and a voltage zero approximation period of a power grid connected to the wind turbine generator group (S101), the absolute value of the voltage of the power grid being less than a voltage zero approximation threshold during the voltage zero approximation period; obtaining the duration of the contactor delay according to the contactor delay influence factor (S102), the duration of the contactor delay being the duration from when the contactor receives a switching instruction to when the contactor pulls in or disconnects; on the basis of the voltage zero approximation period and the duration of the contactor delay, determining a switching time point of a filter capacitor (S103); and when the switching time point arrives, sending the switching instruction to the contactor, so that the pull-in time point or the disconnection time point of the contactor is located within the voltage zero approximation period (S104). The risk of failure occurring in the wind turbine generator group can be reduced.
A motor coil and a manufacturing method therefor, a motor stator and a manufacturing method therefor, and a motor. The stator manufacturing method comprises: providing a first conductor and a second conductor, an electrical resistivity of the second conductor being less than that of the first conductor (S110); acquiring a rated current increase coefficient according to an expected power of a motor (S120), the rated current increase coefficient being a ratio of a rated current of the motor at the expected power to a rated current of a reference motor, wherein, coil conductors in the reference motor are first conductors; acquiring a first conductor turn count of the first conductor and a second conductor turn count of the second conductor in each coil according to the rated current increase coefficient (S130); and manufacturing the coil according to the first conductor turn count and the second conductor turn count (S140). The motor coil manufacturing method provides a coil meeting requirements according to an expected power of a motor.
H02K 15/085 - Forming windings by laying conductors into or around core parts by laying conductors into slotted stators
H02K 15/04 - Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of windings prior to their mounting into the machines
H02K 15/02 - Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
H02K 3/12 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
H02K 3/24 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
91.
HYBRID DAMPING MODULE, VIBRATION SUPPRESSION DEVICE, VIBRATION SUPPRESSION METHOD, AND WIND TURBINE SET
A hybrid damping module, a vibration suppression device, a vibration suppression method, and a wind turbine set. The hybrid damping module comprises a first damping unit (8). The first damping unit (8) comprises a rotor portion (8a) and a stator portion (8b) that is provided parallel to the rotor portion (8a). The rotor portion (8a) is configured to capable of rotating relative to the stator portion (8b) so as to generate electromagnetic damping. A flow passage is formed in at least one of the rotor portion (8a) and the stator portion (8b). The hybrid damping module comprises a second damping unit (10) comprising a liquid damper. The liquid damper communicates with the flow passage and forms a circulation loop. A liquid (10p) in the liquid damper can cyclically flow in the circulation loop. In the hybrid damping module, a combined vibration suppression solution that combines a TMD and TLD is provided. By means of using a TMD and TLD in combination, the vibration suppression effect of the hybrid damping module can be increased. Furthermore, the problem of the attenuation of damping force caused by increasing temperature in a permanent magnet eddy current damping device is addressed.
F16F 15/023 - Suppression of vibrations of non-rotating, e.g. reciprocating, systemsSuppression of vibrations of rotating systems by use of members not moving with the rotating system using fluid means
F16F 15/03 - Suppression of vibrations of non-rotating, e.g. reciprocating, systemsSuppression of vibrations of rotating systems by use of members not moving with the rotating system using electromagnetic means
92.
WIND TURBINE GENERATOR SYSTEM, AND ROTATION SPEED AVOIDANCE CONTROL METHOD AND APPARATUS THEREFOR
A wind turbine generator system and a rotation speed avoidance control method therefor. The method comprises: according to statistical information of the rotation speed of a generator being in a rotation speed avoidance interval, identifying whether a wind turbine generator system repeatedly falls within the rotation speed avoidance interval; and when it is determined that the wind turbine generator system repeatedly falls within the rotation speed avoidance interval, adjusting a rotation speed avoidance control parameter of the wind turbine generator system according to the statistical information of the rotation speed being in the rotation speed avoidance interval. Correspondingly, further provided is a rotation speed avoidance control apparatus for a wind turbine generator system.
A motor coil and a manufacturing method therefor, a motor stator and a manufacturing method therefor, and a motor. The stator manufacturing method comprises: providing a first conductor and a second conductor, an electrical resistivity of the second conductor being less than that of the first conductor (S110); acquiring a rated current increase coefficient according to an expected power of a motor (S120), the rated current increase coefficient being a ratio of a rated current of the motor at the expected power to a rated current of a reference motor, wherein, coil conductors in the reference motor are first conductors; acquiring a first conductor turn count of the first conductor and a second conductor turn count of the second conductor in each coil according to the rated current increase coefficient (S130); and manufacturing the coil according to the first conductor turn count and the second conductor turn count (S140). The motor coil manufacturing method provides a coil meeting requirements according to an expected power of a motor.
H02K 15/085 - Forming windings by laying conductors into or around core parts by laying conductors into slotted stators
H02K 3/24 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
94.
WIND TURBINE AND CONVERTER FILTER CAPACITOR SWITCHING CONTROL METHOD, DEVICE AND SYSTEM THEREFOR
A wind turbine generator group, and a converter filter capacitor switching control method, apparatus, and system therefor, which relate to the field of wind power generation. The method comprises: acquiring a contactor delay influence factor of a converter and a voltage zero approximation period of a power grid connected to the wind turbine generator group (S101), the absolute value of the voltage of the power grid being less than a voltage zero approximation threshold during the voltage zero approximation period; obtaining the duration of the contactor delay according to the contactor delay influence factor (S102), the duration of the contactor delay being the duration from when the contactor receives a switching instruction to when the contactor pulls in or disconnects; on the basis of the voltage zero approximation period and the duration of the contactor delay, determining a switching time point of a filter capacitor (S103); and when the switching time point arrives, sending the switching instruction to the contactor, so that the pull-in time point or the disconnection time point of the contactor is located within the voltage zero approximation period (S104). The risk of failure occurring in the wind turbine generator group can be reduced.
A rotation speed avoidance control method for a wind turbine generator system. The method comprises: when a power-limited operation instruction is received, determining a power value upper limit required by the instruction; determining whether the required power value upper limit is in a power avoidance interval corresponding to a rotation speed avoidance interval; and when the required power value upper limit is in the power avoidance interval, setting the maximum allowable power value of a wind turbine generator system to be a lower boundary value of the power avoidance interval. An upper boundary value of the power avoidance interval is a power value determined on the basis of an upper boundary value of the rotation speed avoidance interval, and the lower boundary value of the power avoidance interval is a power value determined on the basis of a lower boundary value of the rotation speed avoidance interval, wherein the rotation speed avoidance interval and the power avoidance interval are open intervals. By means of the control method, an operation range of the rotation speed of a wind turbine generator system in a power-limited operation state can be prevented from overlapping with a rotation speed avoidance interval, thereby preventing resonance of the generator system, load increase or other safety problems. In addition, the present invention further relates to an apparatus for implementing the control method, and a wind turbine generator system.
A wind turbine generator system and a rotation speed avoidance control method therefor. The method comprises: according to statistical information of the rotation speed of a generator being in a rotation speed avoidance interval, identifying whether a wind turbine generator system repeatedly falls within the rotation speed avoidance interval; and when it is determined that the wind turbine generator system repeatedly falls within the rotation speed avoidance interval, adjusting a rotation speed avoidance control parameter of the wind turbine generator system according to the statistical information of the rotation speed being in the rotation speed avoidance interval. Correspondingly, further provided is a rotation speed avoidance control apparatus for a wind turbine generator system.
A rotation speed avoidance control method for a wind turbine generator system. The method comprises: when a power-limited operation instruction is received, determining a power value upper limit required by the instruction; determining whether the required power value upper limit is in a power avoidance interval corresponding to a rotation speed avoidance interval; and when the required power value upper limit is in the power avoidance interval, setting the maximum allowable power value of a wind turbine generator system to be a lower boundary value of the power avoidance interval. An upper boundary value of the power avoidance interval is a power value determined on the basis of an upper boundary value of the rotation speed avoidance interval, and the lower boundary value of the power avoidance interval is a power value determined on the basis of a lower boundary value of the rotation speed avoidance interval, wherein the rotation speed avoidance interval and the power avoidance interval are open intervals. By means of the control method, an operation range of the rotation speed of a wind turbine generator system in a power-limited operation state can be prevented from overlapping with a rotation speed avoidance interval, thereby preventing resonance of the generator system, load increase or other safety problems. In addition, the present invention further relates to an apparatus for implementing the control method, and a wind turbine generator system.
A wind turbine generator, and a minimum rotational speed control method therefor. The method comprises: identifying, according to statistical information obtained when rotational speeds of generators are in respective minimum rotational speed intervals, whether or not a wind turbine generator has repeatedly entered a minimum rotational speed interval; and if so, adjusting, according to the statistical information obtained when the rotational speeds are in the minimum rotational speed intervals, a pitch control system parameter and/or an electromagnetic torque control parameter of the wind turbine generator. The method can avoid abnormalities caused to a generator when same repeatedly enters a minimum rotational speed interval. The present invention further relates to a control device for implementing the above control method.
A method, an apparatus, and a system for monitoring an islanding electricity generation unit. The method comprises: determining an islanding electricity generation unit in a new energy station on the basis of collected electrical capacity at critical electrical nodes of the new energy station (S10); and controlling a switch device corresponding to the determined islanding electricity generation unit to sever connection between said electricity generation unit and a collector line (S20), the critical electrical nodes comprising nodes that have a collecting effect on grid-connected current of the electricity generation units of the new energy station, and each collector line being constructed to collect grid-connected current from at least one electricity generation unit and input same into a main transformer of the new energy station.
A load reduction control method for a wind turbine generator, the load reduction control method comprising: determining a representative blade root load value of a wind turbine generator (10); determining an additional variable pitch rate value on the basis of the representative blade root load value; determining a variable pitch rate control value according to a variable pitch rate specified value and the additional variable pitch rate value; and simultaneously applying the variable pitch rate control value to blades (15) of the wind turbine generator so as to control the blades (15) of the wind turbine generator (10) to perform a variable pitch action. A device and system using the load reduction control method for a wind turbine generator are further provided. The load level of the whole machine can be greatly reduced in the case where there is little influence on the generating capacity.
