Embodiments of present disclosure relates to controlling of a frequency converter. A radio frequency transceiver is provided. The radio frequency transceiver includes a control unit configured to establish a wireless connection with a service module, and enable information communication between a frequency converter and the service module. The radio frequency transceiver is coupled to the frequency converter via a wired connection. The radio frequency transceiver may be included in a drive system with at least one frequency converter.
A method for heating a wind turbine facility (42) comprises: charging a DC link (24) of an electrical converter (10) connected with a wind turbine (14) of the wind turbine facility (42); heating air inside the wind turbine facility (42) with heat generated by a voltage limiting unit (28) interconnected with the DC link (24), which comprises a resistor (30) adapted for dissipating electrical energy into heat for reducing a voltage in the DC link (24), when the voltage is above a threshold voltage; wherein the voltage limiting unit (28) is controlled, such that the voltage limiting unit (28) generates heat according to settings defined in a controller (34) of the voltage limiting unit (28). The heating settings are changed based upon commands from a user interface (64). Furthermore, the DC link (24) is charged by a grid side converter (20) of the wind turbine facility (42) with power from an electrical grid (16).
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
An electrical converter system (10) comprises an electrical converter (12) for converting an input voltage into a converter output voltage (20); a transformer (14) interconnected with the electrical converter (12) at a secondary side (28) and for transforming the converter output voltage (20) into a transformer output voltage (30) at a primary side (32); and a controller (16) adapted for switching the electrical converter (12) with optimized pulse patterns (22), such that the electrical converter (12) produces the converter output voltage (20) with a fundamental frequency and a series of harmonics (24). Between the secondary side (28) and the primary side (32), the transformer (14) has a frequency damping behaviour like a low pass filter. The optimized pulse patterns (22) are optimized such that the converter output magnitudes (26) of harmonics (24) in an upper frequency range (68) are higher than those of harmonics (24) in a lower frequency range (66) and such that the converter output magnitudes (26) of the harmonics (24) in the upper frequency range (68) at the secondary side (28) are higher than predefined threshold magnitudes (36, 36a, 36b) for the harmonics (24) in the upper frequency range (68) and transformer output magnitudes (34) of the harmonics (24) in the upper frequency range (68) at the primary side (32), which are damped by the transformer (14), are lower than the predefined threshold magnitudes (36, 36a, 36b).
H02M 1/12 - Dispositions de réduction des harmoniques d'une entrée ou d'une sortie en courant alternatif
H02M 5/458 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant alternatif, p. ex. pour changement de la tension, pour changement de la fréquence, pour changement du nombre de phases avec transformation intermédiaire en courant continu par convertisseurs statiques utilisant des tubes à décharge ou des dispositifs à semi-conducteurs pour transformer le courant continu intermédiaire en courant alternatif utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs
H02M 7/493 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande les convertisseurs statiques étant agencés pour le fonctionnement en parallèle
H02M 7/5387 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs, p. ex. onduleurs à impulsions à un seul commutateur dans une configuration en pont
H02J 3/01 - Dispositions pour réduire les harmoniques ou les ondulations
An electrical multi-phase converter (20) comprises at least two phase branches (22) for providing at least two output voltages, wherein each phase branch (22) comprises at least one converter cell (10) supplied with a supply voltage (US_mn), and the at least two phase branches (22) are adapted for converting the supply voltages (US_mn) into the at least two output voltages. A method for controlling the electrical multi-phase converter (20) comprises: determining at least two supply voltages (US_mn) for the at least two converter cells (10) of the at least two phase branches (22); determining a potential zone (26) for each phase branch (22) based on the at least one supply voltage (US_mn) of the at least one converter cell (10) of the phase branch (22), the potential zone (26) bounding a possible actual phase voltage producible by the phase branch (22); receiving a reference voltage (Ur_m) for each phase branch (22); and, if the reference voltage (Ur_m) for a phase branch (22) is not within the potential zone (26) of the phase branch (22), setting the reference voltage (Ur_m) to a bound of the potential zone (26) and shifting reference voltages of other phase branches (22), wherein the reference voltages are set and shifted such that a minimal common mode voltage between the output voltages of the multi-phase converter (20) is generated.
A method for testing a wind turbine (12b), the method comprising: supplying an island grid (14), at least one wind turbine (12b) to be tested is connected to, with at least one grid emulating wind turbine (12a), the grid emulating wind turbine (12a) generating electrical energy based on wind energy and the grid emulating wind turbine (12a) being adapted for maintaining a nominal voltage and nominal frequency in the island grid (14), the nominal voltage and nominal frequency being the voltage of a utility grid, which is disconnected from the island grid during testing of the wind turbine (12b) to be tested; controlling the at least one grid emulating wind turbine (12a), such that a test scenario with a different voltage different from the nominal voltage and/or a different frequency different from the nominal frequency is produced in the island grid (14) to simulate a utility grid with a specific fault scenario;controlling the at least one grid emulating wind turbine (12a), such that surplus electrical energy supplied to the island grid (14) by the at least one wind turbine (12b) to be tested is dissipated via a resistive load (40, and/or 42) from the island grid (14) to maintain the different voltage and/or different frequency.
G01R 31/42 - Tests d'alimentation d'alimentations en courant alternatif
G01R 19/25 - Dispositions pour procéder aux mesures de courant ou de tension ou pour en indiquer l'existence ou le signe utilisant une méthode de mesure numérique
G01R 31/28 - Test de circuits électroniques, p. ex. à l'aide d'un traceur de signaux
The present invention provides a method for connecting a main converter (200) e.g. for use in a power plant (204) for regenerative energy having a generator (206), to a power grid (212), the main converter (200) comprising a grid breaker (214) provided at a power grid side (210) of the main converter (200), and at least two converter paths (216) comprising each a central DC link (218), a grid side converter (220) and a generator side converter (222), both connected to the DC link (218), and a pre-charge unit (232) connected to the power grid (212) and to at least one of the at least two converter paths (216), comprising the steps of providing energy from the pre-charge unit (232) to at least one of the at least two converter paths (216), pre-charging the at least one converter path (216) using the energy provided from the pre-charge unit (232), pre-charging at least one further converter path (216) of the at least two converter paths (216) using the energy provided from the pre-charge unit (232) via the at least one converter path (216) through the grid side converter (220) of the at least one converter path (216) and the grid side converter (220) of the at least one further converter path (218), and connecting the main converter (200) to the power grid (212) by closing the grid breaker (214). The present invention also provides a respective main converter (200) adapted to perform the above method and a software package for upgrading a main converter (200) to perform the above method.
H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
H02M 5/458 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant alternatif, p. ex. pour changement de la tension, pour changement de la fréquence, pour changement du nombre de phases avec transformation intermédiaire en courant continu par convertisseurs statiques utilisant des tubes à décharge ou des dispositifs à semi-conducteurs pour transformer le courant continu intermédiaire en courant alternatif utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs
H02M 7/12 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
A converter system (10) comprises at least two phase modules (18a, 18b), each phase module (18a, 18b) comprising a first converter leg (26a) and a second converter leg (26b) interconnected with a DC link (24), and a charging transformer (40) for charging the DC link (24). The DC link (24) comprises two capacitors (28a, 28b) connected in series between a positive point (30), a middle point (32) and a negative point (34), each converter leg (26a, 26b) being adapted for interconnecting an output (36a, 36b) with the positive point (30), the middle point (32) or the negative point (34) of the DC link (24). The phase modules (18a, 18b) are connected in series via outputs (36a, 36b) of the converter legs (18a, 18b), such that a second converter leg (36b) of a lower phase module (18a) is connected with a first converter leg (36a) of a higher phase module (18b). The charging transformer (40) is connected to the middle point (32) of the DC link (24) of a highest phase module (18b), which provides a phase output (U, V, W) of the converter system (10) with an output (36b) of a second converter leg (26b). The converter system (10) further comprises at least two converter phases (20), each converter phase (20) comprising at least two series connected phase modules (18a, 18b). At a star point (Y) of the converter phases (20) the converter phases (20) are star-connected via outputs (36a) of first converter legs (26a) of lowest converter modules (18a), which are series connected with higher converter modules (18b), whereby a module side star point (Υ') of the charging transformer (40) is connected or is not connected with the star point (Y) of the converter phases (20).
An electrical converter (10) comprises at least two converter units (16), each converter unit (16) comprising a neutral point clamped half-bridge (32, 34) with a neutral point (30), an AC output (38, 40), a positive DC output (26) and a negative DC output (28) and each converter unit (16) comprising a DC link (20) with two DC link capacitors (31), which are interconnecting the positive DC output (26) and the negative DC output (28) with the neutral point (30). The half-bridges (32, 34) of the converter units (16) are interconnected via its neutral points (30) via a first connection and via its AC outputs via a second connection and at least one of the first connection and the second connection comprises an electrical filter (52, 54). A method for discharging the DC link capacitors (31) comprises: switching a first half bridge (32, 34) of a first converter unit (16) to a positive state, in which its AC output (38, 40) is connected with its positive DC output (26), and simultaneously switching a second half bridge (32, 34) of a second converter unit (16) to a negative state, in which its AC output (38, 40) is connected with its negative DC output (28), such that a DC link capacitor (31) of the first converter unit and a DC link capacitor (31) of the second converter unit (16) are interconnected oppositely to each other and discharged via the electrical filter (52, 54).
H02M 1/32 - Moyens pour protéger les convertisseurs autrement que par mise hors circuit automatique
H02M 5/458 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant alternatif, p. ex. pour changement de la tension, pour changement de la fréquence, pour changement du nombre de phases avec transformation intermédiaire en courant continu par convertisseurs statiques utilisant des tubes à décharge ou des dispositifs à semi-conducteurs pour transformer le courant continu intermédiaire en courant alternatif utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs
An earthing switch (10) is specified that comprises: a base (12) for mounting the earthing switch (10), a first contact element (14a, 14b, 14c) that is mounted on the base via a first insulating element (24), a shaft (16) mounted in the base (12), a second contact element (18a, 18b, 18c), mounted on the shaft (16), that can swivel relative to the first contact element (14a, 14b, 14c) by means of the shaft (16), so that the second contact element (18a, 18b, 18c) can move between a closed and an open position, a locking and/or monitoring apparatus (42, 44) for locking the shaft (16) and/or for monitoring the position of the shaft (16), wherein the locking and/or monitoring apparatus (42, 44) is fitted to the base (12) next to the first contact element (14a, 14b, 14c), wherein a second insulating element (28) held between the base (12) and the first insulating element (24) has an insulating plate (46) that protrudes from the base (12) and that is arranged between the first contact element (14a, 14b, 14c) and the locking and/or monitoring apparatus (42, 44). The electrical insulation between the first contact element (14a, 14b, 14c), which is under high voltage, and the locking and/or monitoring apparatus (42, 44) can be improved by the additional insulating element, which provides an insulating plate between these two components, further improving an already existent insulation via an air gap.
H01H 31/00 - Interrupteurs à coupure dans l'air pour haute tension sans moyen d'extinction ou de prévention des arcs
H01H 31/28 - Interrupteurs à coupure dans l'air pour haute tension sans moyen d'extinction ou de prévention des arcs avec contact mobile demeurant électriquement connecté à une ligne en position d'ouverture de l'interrupteur avec contact à déplacement angulaire
H01H 31/08 - Mécanismes d'interverrouillage pour interverrouiller plusieurs organes du mécanisme actionnant les contacts
09 - Appareils et instruments scientifiques et électriques
Produits et services
(1) Computer programs for set up, control and maintenance of power drive systems in the field of industrial electrical motor operations, computer operating programs.
