The invention relates to a measurement device (1) for measuring a current in at least one cable shield of an electrical transmission grid using the Zeeman effect in the presence of a magnetic field (BT) from the environment, in particular the Earth's magnetic field or magnetic noise, comprising:
at least one assembly of one or more measurement cells (3, 3′),
at least one source of polarized light (7),
at least one polarimetry system (11),
in which
the assembly of one or more measurement cells (3, 3′) is configured so as to define at least one pair of first and second measurement sections (I1, I2), the measurement sections (I1, I2) of a pair being parallel and arranged perpendicular to a conductor (31) that is connected to the cable shield and on the opposite sides of the conductor (31), the polarized beam of light (9) flowing through the second measurement section (I2) in the opposite direction with respect to through the first section (I1) so that the contributions of the magnetic field from the environment to the first parameter in the first and second measurement sections (I1, I2) cancel each other out.
A device for disconnecting a high-voltage direct electric current via a fuse interposed in a main branch, includes an overload system able to generate an oscillating overload current which, in the main branch, over at least one half-period of oscillation, is added to a fault current in terms of absolute value to ensure the melting of the fuse. A method for disconnecting a high-voltage direct electric current, via a fuse interposed in a main branch, includes: storing an electrical energy in an overload system; generating, by the overload system, an oscillating overload current which, in the main branch, over at least one half-period of oscillation, is added to the fault current in terms of absolute value to ensure the melting of the fuse.
H02H 3/02 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection Details
H01H 85/46 - Circuit arrangements not adapted to a particular application of the protective device
H02H 3/087 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current for DC applications
H02H 3/20 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess voltage
H02H 3/22 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess voltage of short duration, e.g. lightning
3.
Cutoff device for high-DC-voltage electric current with plasma tube
A DC high voltage cut-off device includes at least one cut-off module, having: a main cut-off apparatus in a main branch, a general surge protector in an absorption branch, and a changeover branch, with at least one changeover capacitor wherein: a first plasma tube switch in the changeover branch, a pre-charge circuit of the changeover capacitor, a changeover surge protector, in parallel with the changeover capacitor, and having a protection voltage lower than a nominal operating voltage of the cut-off module and, by at least one pilotable switch which supplies the first plasma tube switch with a voltage derived from an electric voltage between the armatures of the changeover capacitor.
H02H 7/26 - Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occurred
H01H 9/54 - Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
H02H 3/08 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current
H02H 3/087 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current for DC applications
H02H 3/20 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess voltage
4.
Water turbine power generation system and control method for providing improved dynamic response to major power setpoint variations
The invention relates to a method for controlling an energy production system (1), comprising: —a connecting link (6) provided with a connection (62) to an AC network (2); —a turbine system (3) comprising an electric machine (31) for delivering a nominal electrical power Pnom; —an energy storage system (14), comprising the following steps; —receipt of a first electrical power setpoint Ps0 and control of the turbine system (3) so as to deliver an electrical power Pt0=Ps0; and —receipt of an electrical power setpoint Ps1, where ΔPs=Ps1−Ps0 and |ΔPs|>Pnom*0.3; a) application of a hydraulic setpoint to the turbine system (3) so as to increase the delivered electrical power Pti thereof and prevent the storage system (14) from delivering electrical power (62); b) determination of the power Pea that the storage system (14) is able to supply; c) when Pti+Pea≥Ps1−ε1, the storage system (14) delivers an electrical power Pe1 to satisfy the requirement Ps1−ε1≤Pe1+Pti≤Ps1+ε2.
A method for monitoring a system for transmitting electrical power for a network for transmitting DC electrical power. The method involves determining, along a measurement segment, a profile of a temperature parameter, determining a theoretical leakage current between the grounding connections of the measurement segment, taking into account the temperature parameter profiles and the load current and voltage, measuring the leakage current between the grounding connections of the measurement segment, and generating an alert if there is a difference between the theoretical and measured leakage current.
G01R 31/00 - Arrangements for testing electric propertiesArrangements for locating electric faultsArrangements for electrical testing characterised by what is being tested not provided for elsewhere
G01R 31/08 - Locating faults in cables, transmission lines, or networks
G01R 31/52 - Testing for short-circuits, leakage current or ground faults
G01R 31/58 - Testing of lines, cables or conductors
6.
ELECTRICITY GENERATION SYSTEM COMPRISING A WATER TURBINE WITH IMPROVED DYNAMIC RESPONSE
An energy production system including a hydraulic turbine system having undesirable electrical power output setpoints and identified safe electrical power output setpoints, an energy storage system, a connection connected to the energy storage system and to an electric machine of the hydraulic turbine system, and further connected to an AC power network, a device for determining the state of charge, a control circuit controlling a transfer of electrical power between the connection and the energy storage system, configured to receive an electrical power setpoint value (Reps) and configured to determine that this received electrical power setpoint value belongs to the undesirable electrical power output setpoint values to generate an electrical power transfer setpoint value (Epts), and an actual electrical power output setpoint value (Aepos) belonging to the safe electrical power output setpoint values, satisfying the relationship Reps=Epts+Aepos.
A power transfer system includes a first branch including a controlled switch and a second branch including a variable frequency converter, in parallel between an AC network and a reversible pump-turbine, the variable frequency converter includes: a first AC/DC converter having a first DC interface, and a second AC/DC converter having a second DC interface, the first and second DC interfaces being connected by a DC link, a control circuit having a first mode wherein it simultaneously opens the switch and it transfers electrical power until it reaches the same frequency on two AC interfaces, and having a second mode wherein it closes the switch of the first branch; an energy storage system; and a switching system for selectively connecting the energy storage system to the DC link.
An induction-controlled switch having a vacuum bulb comprising a vacuum chamber and a switch comprising first and second electrodes. The first switch comprising first and second electrodes and further having a first actuator slidably mounted in a first direction and rigidly attached to the first electrode. The first actuator comprising a first armature. A second actuator comprising a second armature. A first control member comprising a first coil configured to simultaneously generate a switching current in the first armature and a current in the second armature via the first coil, so as to separate or bring into contact the first and second electrodes and so as to move the first and second actuators in opposite ways along the first direction.
A mechanical cut-off apparatus of a high-voltage electric circuit includes: in a main electrical path a main mechanical switch; in a secondary electrical path, a secondary mechanical switch; a mechanical control configured such that, the secondary mechanical switch is brought to its mechanically open state after the main mechanical switch has been brought to its mechanically open state; the apparatus includes a transition dipole comprising a capacitance, the transition dipole arranged in series with the pair of secondary electrical contacts in the secondary electrical path, and in that the apparatus includes a controlled switch which, in an electrically closed state, creates inside the mechanical cut-off apparatus a bypass that short-circuits the capacitance of the transition dipole.
A method for controlling an electrical transmission network including a plurality of DC high-voltage lines and at least three AC/DC converters identified by a respective index i. For each of the converters having index i, the method includes recovering the setpoint active power value Pdci applied thereto, and recovering instantaneous voltage value Vi and voltage angle value θi of the buses having index i and modifying the setpoint active power Pdci of each of the converters having index i by a value including a term ΔPdcsi as a function of a sum of deviations of voltage angles multiplied by contribution adjustment parameters.
Centre National De La Recherche Scientifque (France)
Universite Paris-Saclay (France)
Inventor
Gonzales, Juan Carlos
Costan, Valentin
Damm, Gilney
Benchaib, Abdelkrim
Lamnabhi-Lagarrigue, Françoise
Luscan, Bruno
Abstract
A method for controlling an electrical transmission network including a plurality of DC high-voltage lines and at least three AC/DC converters which are identified by a respective index i and are interconnected by the DC high-voltage lines. Each of the AC/DC converts are connected to an AC voltage bus identified by a respective index i as well as to one of the DC high-voltage lines.
23) and a fault impedance parameter, —measurement of voltage and/or currents evolution at least at one specific location in the said power system (100), —iterative simulation of the voltage and/or current evolution by the physical model at the measurement point with a set of fault parameters where at each step of iteration, simulated and measured voltage and/or current evolutions are compared and the set of fault parameters is adapted according to a convergence criterion, —identification of a fault with its fault parameters when convergence of the measured voltage and/or current evolutions and simulated voltage and/or current evolutions is reached in a limited number of iterations.
G01R 31/08 - Locating faults in cables, transmission lines, or networks
H02H 7/26 - Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occurred
H02J 3/36 - Arrangements for transfer of electric power between ac networks via a high-tension dc link
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
13.
Current cut-off device for high-voltage direct current with resonator and switching
A current cut-off device for high-voltage DC current includes: between a primary point and an intermediate point, a primary diversion member and, in parallel, a primary surge protector; a secondary mechanical switch between the intermediate point and the secondary point; a main resonator whose terminal is linked to the secondary point; a main oscillation switch; a main surge protector, in parallel with a main capacitance of the main resonator; wherein the main oscillation switch includes three terminals linked respectively to the primary point, to the intermediate point and to the other terminal of the main resonator; the changeover switch can switch at least between three direct, inverting and isolated states.
H01H 33/59 - Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the AC cycle
H01H 9/54 - Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
14.
Current cut-off device for high-voltage direct current with adaptive oscillatory circuit, and control method
A current cut-off device for high-voltage direct current, includes: at least one primary mechanical switch placed in a main line between a primary point and a secondary point; a primary surge arrester arranged in parallel with the primary switch; and an oscillatory circuit arranged electrically in parallel with the primary switch and electrically in parallel with the primary surge arrester. The oscillation circuit includes, electrically in series, at least an inductance, a capacitance and an oscillation trigger. The device has, in the oscillation circuit, a controllable device for varying the resistance value inserted in series into the oscillation circuit.
H02H 7/26 - Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occurred
15.
Electrical insulation material and manufacturing process
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS) (France)
UNIVERSITE CLAUDE BERNARD LYON 1 (France)
INSTITUT NATIONAL DES SCIENCES APPLIQUEES DE LYON (France)
UNIVERSITE JEAN MONNET SAINT ETIENNE SAINT (France)
Inventor
Lefort, Thibaut
Bachellerie, Damien
Pruvost, Sébastien
Duchet, Jannick
Livi, Sébastien
Abstract
The invention relates to an electrically insulating composite material (1) comprising a polyepoxide matrix (2) of cycloaliphatic type or of diglycidyl ether type in a content of less than 40% by mass, from 20 to 75% by mass of one or several micrometric and/or mesometric filler(s) (3), and from 0.1 to 20% by mass of at least one ionic liquid (4), the masses being expressed relative to the total mass of the electrically insulating composite material (1). The invention also relates to a method for manufacturing such an electrically insulating composite material (1), as well as its use for an electrically insulating support (9) in a metal-enclosed substation (5).
C08K 5/5313 - Phosphinic compounds, e.g. R2=P(:O)OR'
H01B 3/40 - Insulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances plasticsInsulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances resinsInsulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances waxes epoxy resins
A high-voltage direct current cut-off device, includes: a primary mechanical switch and a secondary mechanical switch placed successively between a primary point and a secondary point but either side of an intermediate point, a primary surge arrester arranged parallel with the primary switch, a secondary surge arrester arranged electrically parallel with the secondary switch. The secondary surge arrester is arranged electrically between the intermediate point and the secondary point, and in that the device comprises a capacitive buffer circuit electrically in parallel with the assembly formed by the primary switch and the secondary switch, and electrically in parallel with the assembly formed by the primary surge arrester and the secondary surge arrester, wherein the capacitive buffer circuit comprises an activation switch and a buffer capacitance.
H02H 9/04 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
H02H 3/20 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess voltage
H02H 9/00 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
17.
Superconducting current limiter with electroconductive spacer
A superconducting current limiter having at least one superconducting conductor (3) wound so as to form a coil (2) extending in a single plane and connecting a first electrical connection terminal to a second electrical connection terminal, an electrically insulating spacer (8) being arranged between two turns of the coil. The superconducting conductor (3) consists of at least two separate superconducting cables (5) wound in parallel and whose ends are electrically connected by the first electrical connection terminal and by the second electrical connection terminal, respectively. An electrically conductive spacer (12) is arranged between two of said separate superconducting cables (5), this electrically conductive spacer (12) being able to be traversed by a cooling fluid.
A power flow control device intended to be used in a mesh network. The device includes a first voltage source connected between a first terminal (B1) and a third terminal (B3). A second voltage source is connected between a second terminal (B2) and the third terminal (B3). A current source is connected alternately to the first voltage source and the second voltage source and configured to ensure a transfer of energy between the first voltage source and the second voltage source. A switching means is arranged to allow the current source to be connected alternately in parallel with the first voltage source or in parallel with the second current source.
The present invention relates to a device (1) for measuring a magnetic field (B) and/or an electric field (E) comprising:—a measurement cell (3) enclosing a gas that is sensitive to the Zeeman effect and/or to the Stark effect, a polarised light source (7) the wavelength of which is tuned to an absorption line of the gas that is sensitive to the Zeeman effect and/or to the Stark effect,—at least one polarimetry system (11) configured to measure a first parameter corresponding to the rotation by a polarisation angle caused by the passage of the beam (9) through the measurement cell (3) enclosing a gas that is sensitive to the Zeeman effect and/or to the Stark effect,—a system (13) for measuring absorption, configured to measure a second parameter corresponding to the absorption of the beam (9) by the gas that is sensitive to the Zeeman effect and/or to the Stark effect in the measurement cell (3), and a processing unit (15) configured to combine the measurement of the first parameter corresponding to the rotation by the polarisation angle and the absorption measurement in order to extract therefrom a third and/or fourth parameter corresponding respectively to an electric field (E) and/or a magnetic field (B) to be measured.
Disclosed is a device for controlling a terminal connected in a multi-terminal high-voltage direct current transmission facility, the terminal being able to provide or draw power on the DC part of the facility comprised between an upper power limit and a lower power limit, the device further comprising at least one regulation circuit configured to vary the power provided or drawn by the terminal on the DC part of the facility, as a function of a voltage variation on the DC part of the facility, the device further comprising a limitation circuit configured to limit the variation of the power provided or drawn by the terminal, for a given voltage variation, when the power difference between the power provided or drawn by said terminal and the upper power limit or the lower power limit becomes smaller than a determined value.
A superconducting current limiting dipole (L6), comprising a superconducting conductor (F6) wound so as to form a two-wire coil extending in a single plane, a layer of insulator (E1 to E11, H1) being arranged between two turns of said coil. The superconducting conductor (C1 to C6) consists of at least four separate superconducting cables (C1 to C6) wound in parallel and arranged in at least two pairs, each of the pairs being formed by two of said superconducting cables (C1 to C6) that are electrically connected to one another in a first connection area, and, in a second connection area, one of the superconducting cables of one pair is electrically connected to one of the superconducting cables of the other pair, the other superconducting cable of each pair being connected to an electrical connection terminal (T1, T2) or to an additional pair.
The invention relates to a multi-level modular converter provided with a control circuit comprising a computer to calculate an internal control setpoint of the converter and an energy management circuit allowing a power setpoint to be determined that is to be transmitted to the alternating electrical power supply network, the control circuit being configured to regulate the voltage at the point of connection of the converter to the direct electrical power supply network and to regulate the voltage at the terminals of each capacitor modelled as a function of the internal control setpoint and of the power setpoint to be transmitted to the alternating electrical power supply network.
H02M 7/48 - 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
H02M 7/483 - Converters with outputs that each can have more than two voltage levels
H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
H02M 1/10 - Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from AC or DC
H02M 7/217 - Conversion of AC power input into DC 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
A method of protecting a high-voltage network comprising the steps for maintaining first controlled switches closed and second controlled switches open; measuring voltage and current on high-voltage interfaces; communicating the direction of the current to the other end of a high-voltage line; for each node: identifying a fault; verifying that the current is lower than the current interruption capability of the high-voltage interface switch and opening this switch.
H02J 3/36 - Arrangements for transfer of electric power between ac networks via a high-tension dc link
H01H 33/59 - Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the AC cycle
H01L 39/16 - Devices switchable between superconductive and normal states
H02H 7/26 - Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occurred
H02H 7/28 - Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occurred for meshed systems
H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
The invention proposes a high-voltage direct current cut-off device, comprising: in series, a cut-off device and a current limiter; an accumulation line in parallel with the current limiter, an oscillating circuit, in parallel with the cut-off apparatus, comprising an oscillation control switch and having an inductance wherein the accumulation line includes at least two accumulation capacitors, and in that the oscillation line extends from a branch connection point of the accumulation line situated between the two accumulation capacitors, determining a secondary segment of the accumulation line connected to the main conduction line between the current limiter and the main cut-off apparatus so as to form part of the oscillating circuit.
H02H 3/087 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current for DC applications
H02H 3/02 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection Details
H02H 3/20 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess voltage
26.
Electronic power module comprising a dielectric support
Institut National Des Sciences Appliquees De Lyon (France)
Centre National De La Recherche Scientifique (France)
Inventor
Buttay, Cyril
Abstract
A power electronic module (1) including at least one semiconductor (5) that is connected to connection conductors (6, 7), and including a dielectric carrier (10) having both a fixed layer (9), on which at least one of said connection conductors (6) is mounted, and a movable layer (11), the fixed layer (9) and the movable layer (11) exhibiting similar dielectric permittivities and being superposed along at least one surface facing the at least one connection conductor (6).
H01L 23/427 - Cooling by change of state, e.g. use of heat pipes
H01L 23/22 - Fillings characterised by the material, its physical or chemical properties, or its arrangement within the complete device liquid at the normal operating temperature of the device
H01L 23/24 - Fillings characterised by the material, its physical or chemical properties, or its arrangement within the complete device solid or gel, at the normal operating temperature of the device
H01L 23/473 - Arrangements for cooling, heating, ventilating or temperature compensation involving the transfer of heat by flowing fluids by flowing liquids
27.
Mechanical cut-off apparatus for a high-voltage or very high-voltage electric circuit with splitting device
A mechanical breaker apparatus for breaking an electric circuit comprises two electrodes that are movable relative to each other, and including an electric arc splitter device having a multitude of distinct conductive elements that are spaced apart and electrically insulated relative to one another. The splitter device has a first portion and a second portion that are movable relative to each other between: an electrical contact position; and a spaced-apart position of the two portions. The splitter device has at least one series of the distinct conductive elements that, in an electrically closed position of the electrodes of the mechanical apparatus, are arranged along the continuous electrically-conductive path for the nominal electric current through the apparatus as defined by the two portions of the splitter device in the electrical contact position.
An undersea connection system for connecting together at least three high voltage or very high voltage undersea electric cables comprises an outer cage defining a connection space; and a connection fitting comprising a conductive connection electrode that presents a junction node from which there extend at least three branches. Each of the at least three branches of the conductive electrode includes a male terminal portion that is connected to a respective one of the electric cables in a connection zone about which there is mounted a connection sleeve made of pre-molded insulating material that receives, via its ends, firstly the male terminal portion of one of the branches of the conductive electrode, and secondly the connection end of one of the electric cables.
H02G 15/14 - Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes for incorporating transformers, loading coils or amplifiers specially adapted for submarine cables
H02G 15/188 - Cable junctions protected by sleeves, e.g. for communication cable with devices for relieving electrical stress connected to cable shield only
H01R 13/523 - Dustproof, splashproof, drip-proof, waterproof, or flameproof cases for use under water
H01R 31/02 - Intermediate parts for distributing energy to two or more circuits in parallel, e.g. splitter
H02G 15/184 - Cable junctions protected by sleeves, e.g. for communication cable with devices for relieving electrical stress
H02G 15/115 - Boxes split perpendicularly to main cable direction
H02G 15/113 - Boxes split longitudinally in main cable direction
29.
Method for controlling an installation allowing DC current to be transmitted in a network while protecting said network from a short circuit fault
A control method allows the control of an installation for transmitting electricity comprising a DC transmission network including a group of electricity transmission lines that are linked to one another. The method allows the opening of at least one N-1 safety system, for each safety system being opened, the contribution to the flow of current through the group of transmission lines, originating from the converter station associated with the safety system that is opened, is removed. Furthermore, the method also allows a search for the short-circuit fault in order to identify the faulty transmission line, and an operation, implemented after identification of the faulty transmission line by the search step, of isolating the faulty transmission line by opening the line circuit breakers of the faulty transmission line.
H02H 7/26 - Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occurred
H02H 3/30 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to difference between voltages or between currentsEmergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus using pilot wires or other signalling channel
H02H 7/122 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for convertersEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for rectifiers for static converters or rectifiers for inverters, i.e. DC/AC converters
H02H 7/28 - Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occurred for meshed systems
H02H 1/00 - Details of emergency protective circuit arrangements
H02J 3/36 - Arrangements for transfer of electric power between ac networks via a high-tension dc link
H02H 7/125 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for convertersEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for rectifiers for static converters or rectifiers for rectifiers
30.
Module for controlling the internal energy of a converter
The invention relates to a modular multilevel converter (10) including a control module (12) for regulating the internal energy stored in the capacitors of the submodules of an arm of the converter, the control module being suitable for limiting the internal energy to below an upper limit and/or to above a lower limit, by using parameters measured on the DC power supply network (110) and on the AC power supply network (120) together with setpoints for the operating power of the converter.
An item of interconnection equipment for a high-voltage DC grid includes first and second terminals for connection to first and second lines of a high-voltage DC grid, a third terminal for connection to a local station or a line of the high-voltage grid, a node connected to the first to third terminals, a first superconductor current limiter and a first controlled switch connected in series between the first terminal and the node, a second superconductor current limiter and a second controlled switch connected in series between the second terminal and the node, a third superconductor current limiter and a third controlled switch connected in series between the third terminal and the node, and a current injector configured to inject an electrical current into the node.
H02H 7/26 - Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occurred
H02H 7/28 - Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occurred for meshed systems
H02J 3/36 - Arrangements for transfer of electric power between ac networks via a high-tension dc link
G01R 19/165 - Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
H01H 33/59 - Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the AC cycle
32.
Mechanical cut-off apparatus for a high-voltage or very high-voltage electric circuit with splitting device
A mechanical breaker apparatus for breaking an electric circuit comprises two electrodes that are movable relative to each other, and including an electric arc splitter device having a multitude of distinct conductive elements that are spaced apart and electrically insulated relative to one another. The splitter device has a first portion and a second portion that are movable relative to each other between: an electrical contact position; and a spaced-apart position of the two portions. The splitter device has at least one series of the distinct conductive elements that, in an electrically closed position of the electrodes of the mechanical apparatus, are arranged along the continuous electrically-conductive path for the nominal electric current through the apparatus as defined by the two portions of the splitter device in the electrical contact position.
INSTITUT NATIONAL DES SCIENCES APPLIQUEES DE LYON (France)
CENTRALESUPELEC (France)
Inventor
Shinoda, Kosei
Benchaib, Abdelkrim
Guillaud, Xavier
Dai, Jing
Abstract
The invention relates to a modular multilevel converter (2) having a control module (4) and a computer (10) for computing a setpoint for the internal energy of the converter stored in the capacitors of the submodules of the arms. The control module is configured to deduce, from the setpoint for the internal energy of the converter, a setpoint for the voltage across the terminals of each modeled capacitor, which setpoint is used for regulating the voltage across the points of common coupling between the converter and the DC power supply network and the voltage across the terminals of each modeled capacitor.
H02M 7/483 - Converters with outputs that each can have more than two voltage levels
H02M 7/217 - Conversion of AC power input into DC 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
A current-breaking device for high-voltage direct current includes a main conduction-line and a secondary conduction-line connected in parallel between its terminals. The main conduction-line comprises a first controlled-switch and a circuit connected in series. The circuit comprises a first current-limiter and a first capacitor connected in parallel. The secondary conduction-line comprises a second controlled-switch. These conduction lines cooperate to form an oscillating circuit that oscillates with an amplitude that is at least equal to limiting current passing through the current limiter.
H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
H02H 3/087 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current for DC applications
H01H 9/56 - Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere for ensuring operation of the switch at a predetermined point in the AC cycle
H01H 33/59 - Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the AC cycle
35.
Vacuum-insulated switch enabling testing of the vacuum, switch assembly, and testing method
A medium- or high-voltage switch (10), comprising a high-vacuum enclosure (111); first and second contacts (121, 122) that are mounted to be movable in translation relative to each other inside the enclosure (111) between an open position in which the first and second contacts (121, 122) are spaced apart; and a closed position in which the first and second contacts (121, 122) are in electrical contact. The switch (10) further comprises a conductor (210, 220, 230) arranged inside the enclosure (111) in such a manner that there exists a pressure threshold inside the enclosure (111) from which partial discharges are generated by said conductor, at least when the first and second contacts (121, 122) are in the closed position and the medium or high voltage is applied to the switch (10). The invention further relates to a switch assembly and to a method of testing such a switch.
There is provided a vacuum switching assembly for switching an AC or DC current. The vacuum switching assembly comprises a vacuum switch. The vacuum switch includes: first and second electrodes (20, 22) located in a vacuum tight enclosure, the vacuum tight enclosure containing a gas or gas mixture, the first and second electrodes (20, 22) defining opposed electrodes being separated by a gap, each of the first and second electrodes (20,22) being connectable to a respective electrical circuit carrying an AC or DC voltage; and a pressure controller (36) configured to control an internal pressure of the vacuum tight enclosure, wherein the pressure controller (36) is configured to selectively switch the internal pressure of the vacuum tight enclosure between: a first vacuum level that permits formation and maintenance of a glow discharge in the vacuum tight enclosure to allow a current to flow between the first and second electrodes (20, 22) via the glow discharge so as to turn on the vacuum switch; and a second vacuum level that inhibits formation and maintenance of a glow discharge in the vacuum tight enclosure to prevent a current from flowing between the first and second electrodes (20, 22) via the glow discharge so as to turn off the vacuum switch.
H01J 17/26 - Means for producing, introducing, or replenishing gas or vapour during operation of the tube
H01J 17/22 - Means for obtaining or maintaining the desired pressure within the tube
H01J 17/44 - Cold-cathode tubes with one cathode and one anode, e.g. glow tubes, tuning-indicator glow tubes, voltage-stabiliser tubes or voltage-indicator tubes having one or more control electrodes
H01J 17/14 - Magnetic means for controlling the discharge
H01H 33/59 - Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the AC cycle
37.
VACUUM-INSULATED SWITCH ENABLING TESTING OF THE VACUUM, SWITCH ASSEMBLY, AND TESTING METHOD
The invention relates to a medium- or high-voltage switch (10) comprising: - a secondary vacuum chamber (111); - a first and second contact (121, 122), mounted such as to be movable relative to one another in the chamber (111) between an open position, wherein the first and second contacts (121, 122) are not connected to each other, and a closed position, wherein the first and second contacts (121, 122) are in electrical contact with each other. The switch (10) also comprises a conductor (210, 220, 230) that is arranged in the chamber (111) such that there is a pressure threshold in the chamber (111) beyond which partial discharges are generated by said conductor, at least when the first and second contact (121, 122) are in the closed position, and such that the high or medium voltage is applied to said switch (10). The invention also relates to a switch assembly and to a method for testing such a switch.
There is provided a vacuum switching assembly for switching an AC or DC current. The vacuum switching assembly comprises a vacuum switch. The vacuum switch includes: first and second electrodes (20, 22) located in a vacuum tight enclosure, the vacuum tight enclosure containing a gas or gas mixture, the first and second electrodes (20, 22) defining opposed electrodes being separated by a gap, each of the first and second electrodes (20,22) being connectable to a respective electrical circuit carrying an AC or DC voltage; and a pressure controller (36) configured to control an internal pressure of the vacuum tight enclosure, wherein the pressure controller (36) is configured to selectively switch the internal pressure of the vacuum tight enclosure between: a first vacuum level that permits formation and maintenance of a glow discharge in the vacuum tight enclosure to allow a current to flow between the first and second electrodes (20, 22) via the glow discharge so as to turn on the vacuum switch; and a second vacuum level that inhibits formation and maintenance of a glow discharge in the vacuum tight enclosure to prevent a current from flowing between the first and second electrodes (20, 22) via the glow discharge so as to turn off the vacuum switch.
H01J 17/44 - Cold-cathode tubes with one cathode and one anode, e.g. glow tubes, tuning-indicator glow tubes, voltage-stabiliser tubes or voltage-indicator tubes having one or more control electrodes
patents
