EP3417468B1 - Circuit de commutation, convertisseur comportant une installation de commutation ainsi qu'un procédé de protection du circuit convertisseur - Google Patents

Circuit de commutation, convertisseur comportant une installation de commutation ainsi qu'un procédé de protection du circuit convertisseur Download PDF

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Publication number
EP3417468B1
EP3417468B1 EP16710145.0A EP16710145A EP3417468B1 EP 3417468 B1 EP3417468 B1 EP 3417468B1 EP 16710145 A EP16710145 A EP 16710145A EP 3417468 B1 EP3417468 B1 EP 3417468B1
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EP
European Patent Office
Prior art keywords
voltage
transformer
low
circuit breaker
converter
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Active
Application number
EP16710145.0A
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German (de)
English (en)
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EP3417468A1 (fr
Inventor
Roland Schuster
Michael HÖLZER
Ben RENNINGS
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Siemens Energy Global GmbH and Co KG
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Siemens AG
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Publication of EP3417468A1 publication Critical patent/EP3417468A1/fr
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H33/121—Load break switches
    • H01H33/125—Load break switches comprising a separate circuit breaker
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/59—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

Definitions

  • the invention relates to a switchgear assembly, comprising a first branch which connects a first electrical system to a second electrical system and has at least one series connection of a first disconnector and a first circuit breaker.
  • Such switchgear arrangements are usually used in electrical supply networks for the separable connection of several electrical systems.
  • the supply network can, for example, be a multi-phase AC voltage network.
  • the electrical systems can be, for example, high-voltage systems such as converters, power transformers or the like.
  • a hybrid switch for switching direct currents which comprises a semiconductor switch connected in parallel to a mechanical switch.
  • Another switching device is from the WO 01/37298 A1 known.
  • the object of the invention is to propose a switchgear assembly of the type that is as reliable as possible.
  • the object is achieved in a switchgear arrangement of the type which is set up for equipotential bonding between a first potential point between the first isolating switch and the first circuit breaker and a second potential point in the switchgear arrangement for voltage-free switching of the first isolating switch.
  • the isolating switch is de-energized or de-energized when it is switched over its isolating distance without voltage.
  • the first circuit breaker and then the first disconnector are opened. From our own investigations it follows that a line section of the first branch between the circuit breaker and the disconnector has a parasitic earth capacitance. This earth capacitance is reloaded several times when the disconnector is opened. In this way, an arc is formed in the disconnector, which breaks and re-ignites several times. This causes high-frequency currents in the MHz range that have an amplitude of over one kA and can flow into the system on the disconnector. At least this system can be damaged. In addition, the occurrence of arcing can damage the circuit breaker itself. This reduces its service life and thereby also the reliability of the entire switchgear arrangement. A similar problem can also occur when one of the systems is switched on, in which case the arc can occur when the disconnector is closed.
  • the switchgear arrangement further comprises a second branch, which connects the first plant to a third plant and has at least one series connection of a second disconnector and a second circuit breaker, the first and second branches being arranged in parallel to one another.
  • the first and second branches can be electrically coupled to one another by means of a coupling device, so that a potential equalization can be achieved between a first potential point between the first disconnector and the first circuit breaker and a second potential point between the second disconnector and the second circuit breaker.
  • equipotential bonding is made possible by an electrical connection between two parallel branches of the switchgear arrangement. In this case, the advantage of the invention for breaking the connections between the first and second systems and between the first and third systems can be achieved.
  • the coupling device comprises a first coupling transformer and a second coupling transformer as well as a line connecting the two coupling transformers.
  • the voltage on the side of the first coupling transformer is here preferably transformed to a lower voltage level by means of the first coupling transformer and to a higher voltage level again by means of the second coupling transformer vice versa).
  • the first and second coupling transformers are preferably power voltage transformers.
  • the coupling transformers are furthermore preferably connected via a capacitor.
  • the capacitor can be arranged in the line between the two coupling transformers. Stray reactances occurring at the coupling transformers can advantageously be compensated for by means of the capacitor.
  • the line preferably comprises one or more switches for interrupting the line.
  • the line can be safely interrupted by means of the switch, which is, for example, a load-break switch.
  • the switch can, for example, be a motorized low-voltage switch-disconnector.
  • the switchgear assembly is particularly suitable for use in conjunction with the converter assembly described below.
  • Such a converter arrangement is, for example, from WO 2012/103936 A1 known.
  • the converter arrangement is usually used to convert a direct voltage into an alternating voltage or vice versa.
  • the converter has flow control valves arranged between a DC voltage side and an AC voltage side.
  • the converter On the DC voltage side, the converter can correspondingly be connected to a DC voltage line or a DC voltage network.
  • the converter can be connected to an AC voltage network.
  • the converter of the known converter arrangement is a so-called modular multi-stage converter (MMC).
  • the converter is usually connected to the AC voltage network via a transformer.
  • a primary winding of the transformer can be connected to the AC voltage side of the converter and a secondary winding of the transformer can be connected to the AC voltage network.
  • the converter of the converter arrangement is suitably separated on the AC voltage side with a transformer parallel circuit, the transformer parallel circuit having a first transformer branch which connects the converter to a primary winding of a first transformer and comprises a series circuit of a first disconnector and a first circuit breaker, and one parallel to the first transformer branch having a second transformer branch which connects the converter to a primary winding of a second transformer and comprises a series connection of a second disconnector and a second circuit breaker, the first and the second transformer branch being connectable to each other by means of a low-voltage connection, the low-voltage connection having a first potential point between the first Disconnector and the first circuit breaker with a second potential point between the second disconnector and d em second circuit breaker connects. According to its function, the low-voltage connection corresponds to the coupling device.
  • the AC voltage side of the converter can be connected to the AC voltage network via two transformers connected in parallel. This has several advantages over a connection through a single transformer.
  • the use of two transformers creates redundancy in the system. If one of the transformers fails, the transmission of the electrical power can therefore continue, the connection between the converter and the defective transformer being disconnected.
  • the converter arrangement increases the reliability of the converter arrangement.
  • one of the transformers can be separated from the converter so that maintenance can be carried out more easily.
  • the reliability of the power transmission by means of the converter arrangement according to the invention can also be increased in this way.
  • the size of the first and the second transformer can be selected to be relatively small. This lowers the cost of the converter arrangement.
  • the converter is connected to the first or to the second transformer via a series connection of a circuit breaker and an isolating switch.
  • each of the phase branches has a corresponding series connection of circuit breaker and disconnector. If the electrical connection between the converter and one of the two transformers is to be interrupted, the circuit breaker is first opened in the transformer branch assigned to the respective transformer. When the current flow has stopped, the disconnector connected in series is opened.
  • the two transformer branches can be electrically connected to one another via a low-voltage connection.
  • the low-voltage connection can be used to avoid an error scenario in the converter arrangement described below. The description is based on the example of an interruption in the first transformer branch, but is to be applied in the same way to the second transformer branch.
  • disconnector any suitable disconnector, such as a mechanical disconnector or disconnector with a motor drive, can be used as the disconnector in connection with the invention.
  • any suitable alternating voltage circuit breaker such as a gas-insulated switchgear (GIS)
  • GIS gas-insulated switchgear
  • low voltage is understood to mean a voltage of less than 1 kV.
  • the design of the converter of the converter arrangement is basically arbitrary.
  • the converter can therefore be, for example, a line-commutated converter known to the person skilled in the art, in which thyristor valves are used, or a self-commutated converter with a voltage intermediate circuit or an MMC, also known to the person skilled in the art.
  • the transformer branches each being multi-phase, the converter arrangement comprises a plurality of low-voltage connections which are each assigned one-to-one to each phase.
  • Each phase of the transformer branches includes its own series circuit with one circuit breaker and one isolating switch, the potential points between the circuit breaker and isolating switch of each of the phases being able to be connected to corresponding potential points uniquely assigned to them in phases of the other transformer branch by means of a dedicated low-voltage connection.
  • the low-voltage connection preferably comprises a first and a second voltage converter and a low-voltage line connecting the two voltage converters. Therefore the first voltage converter is assigned to the first transformer branch and the second voltage converter is assigned to the second transformer branch.
  • the two transformer branches are multi-phase. The voltage on the side of the first transformer branch is transformed to low voltage by means of the first voltage converter and to high voltage again by means of the second voltage converter (or vice versa). In this way, a low-voltage connection that is technically easy to produce and control is provided.
  • the first and second voltage converters are preferably Power Voltage Transformers (PVT). Such voltage converters are especially designed and suitable for higher powers. For example, gas-insulated PVT can be used. The nominal power of the PVT can expediently be more than 100 kVA.
  • the low-voltage connection comprises a measuring device for detecting the current in the low-voltage line.
  • the measuring device is used to monitor and protect components of the converter arrangement, for example short-circuit current monitoring in the low-voltage connection.
  • the measuring device can comprise one or more measuring transducers.
  • the low-voltage connection has a low-voltage capacitor.
  • the low-voltage capacitor can be arranged in the low-voltage line between the two voltage converters. Stray reactances occurring at the voltage converters can advantageously be compensated for by means of the low-voltage capacitor.
  • a low-voltage capacitor with a capacitance between 1 mF and 6 mF is preferably used.
  • the low-voltage connection comprises a surge arrester, which is arranged in a parallel circuit with the low-voltage capacitor.
  • the surge arrester is used to protect the low-voltage capacitor in the event of overvoltages on the low-voltage capacitor in the event of a ground fault in the low-voltage line.
  • the surge arrester can be a metal oxide varistor, for example.
  • the low-voltage connection preferably has a discharge resistor.
  • the discharge resistor is expediently arranged in a parallel circuit to the low-voltage capacitor.
  • the discharge resistor is used to safely discharge the low-voltage capacitor after an interruption in the low-voltage connection. In this way, additional personal protection is provided when working on the low-voltage capacitor, for example.
  • the ohmic resistance value of the discharge resistor is preferably between 2 k ⁇ and 50 k ⁇ , particularly preferably between 5 k ⁇ and 30 k ⁇ .
  • the low-voltage connection preferably comprises at least one load break switch for interrupting the low-voltage connection.
  • the low-voltage connection can be safely interrupted using the switch-disconnector.
  • a suitable contactor can also be used.
  • the switch disconnector has the advantage that it generally does not require a permanent supply voltage.
  • the switch-disconnector can for example be a motorized low-voltage switch-disconnector.
  • several switch disconnectors can be provided in the low-voltage connection. For example, in the case of a three-phase design of the low-voltage connection, each of the three phase lines of the low-voltage connection expediently has one or more load-break switches.
  • a switch-on resistor is provided, which is arranged in the low-voltage line.
  • the switch-on resistor is suitably arranged between the two voltage converters and can be bridged by means of a bridging device.
  • the switch-on resistor is provided to minimize the risk of unfavorable saturation of one of the voltage converters, which can occur when the low-voltage connection is switched on if this is carried out with an unfavorable phase position of the voltage, for example when the voltage converter is applied with voltage at a voltage zero crossing becomes.
  • the resistor is expediently bridged by means of the bridging device after a certain time after the low-voltage connection has been switched on.
  • the low-voltage line is single-pole grounded.
  • a defined potential is advantageously established in the low-voltage connection by means of the grounding. If the low-voltage connection comprises three phases, then all three phase lines are expediently single-pole grounded.
  • the invention further relates to a method for protecting a converter arrangement with a converter which is connected on the AC voltage side to a transformer parallel circuit, the transformer parallel circuit having a first transformer branch which connects the converter to a primary winding of a first transformer and a series circuit comprising a first disconnector and a first Comprises circuit breaker, and has a second transformer branch parallel to the first transformer branch, which connects the converter to a primary winding of a second transformer and comprises a series connection of a second disconnector and a second power switch.
  • the object of the invention to be achieved here is to provide such a method which makes it possible to avoid damage to the converter arrangement when one of the two transformers is switched on or off.
  • the object is achieved according to the invention by a method in which a potential equalization between a first potential point between the first disconnector and the first circuit breaker and a second potential point between the second disconnector and the second circuit breaker is established by connecting the two potential points by means of a low-voltage connection before switching the first circuit breaker or the second circuit breaker are electrically connected to each other.
  • the method according to the invention achieves equipotential bonding between the two transformer branches, which avoids the ignition of arcs in the disconnector to be opened or closed due to the ground capacitance.
  • the disconnection process for one of the transformers can expediently be carried out as follows.
  • the two transformers are in an operating state in which both circuit breakers and both disconnectors are closed.
  • a corresponding procedure can also be used when establishing the electrical connection between one of the transformers and the converter.
  • the first circuit breaker and the first disconnector are closed, so that there is an electrical connection between the first transformer and the converter.
  • the second circuit breaker and the second disconnector are open. If the second transformer is to be switched on, the following procedure can be used. First, an equipotential bonding is established between the potential points between the switches in the transformer branches by means of the low-voltage connection.
  • the second disconnector is then closed, for example with a time delay, for example a delay of 1 s.
  • the second circuit breaker is then also closed, so that the electrical connection between the second transformer and the converter is established.
  • the method according to the invention can be carried out by means of all the previously described embodiment variants of the converter arrangement according to the invention.
  • FIG. 1 a switchgear assembly 200 is shown.
  • the switchgear assembly 200 connects a first electrical system 101 to a second electrical system 102 via a three-phase AC voltage line 4.
  • the switchgear assembly 200 comprises a first branch 51, which has a series connection of a first circuit breaker 81 and a first disconnector 91.
  • the circuit breaker 81 and the circuit breaker 91 can each by means of one in the Figure 1 control not shown graphically can be controlled.
  • the circuit breakers and disconnectors shown are arranged in each phase of the first branch 51 accordingly.
  • the switchgear assembly 200 further comprises a coupling device 104.
  • the coupling device 104 comprises a line 15 which extends between a potential point 41 between the first circuit breaker 81 and the first disconnector 91 and a potential point 421 between the first disconnector 91 and the first system 101 on the disconnector .
  • each phase line comprises its own line corresponding to the structure of the line 15.
  • the coupling device 104 comprises a first coupling transformer 11 and a second coupling transformer 12, which are set up for the transformation from a higher voltage level to a lower voltage level (or vice versa).
  • the line 15 can be interrupted by means of a switch 18.
  • a capacitor 25 is provided to compensate for stray reactances of the two coupling transformers 11 and 12.
  • the first isolating switch 91 When the first isolating switch 91 is to be opened or closed, the first potential point 41 and the second potential point 421 are electrically coupled to one another by closing the switch 18. In this way, potential equalization is generated on both sides of the first isolating switch 91, as a result of which the first isolating switch 91 can be opened or closed with almost no voltage, that is to say without voltage across the isolating gap.
  • a switchgear assembly 100 connects a first electrical system 101 via a three-phase AC voltage line 4 to a second electrical system 102 and a third electrical system 103.
  • the switchgear assembly 100 comprises a first branch 51 and a second branch 52 parallel to the first branch 51.
  • the first branch 51 has a series connection of a first circuit breaker 81 and a first disconnector 91.
  • the second branch 52 has a series circuit comprising a second circuit breaker 82 and a second isolating switch 92.
  • the circuit breakers 81, 82 and the circuit breakers 91, 92 can each by means of one in the Figure 2 control not shown graphically can be controlled.
  • the circuit breakers and disconnectors shown are arranged in each phase of the two branches 51, 52.
  • the switchgear assembly 100 further comprises a coupling device 104.
  • the coupling device 104 comprises a line 15 which extends between a potential point 41 between the first circuit breaker 81 and the first disconnector 91 and a potential point 42 between the second circuit breaker 82 and the second disconnector 92.
  • each phase line comprises its own line corresponding to the structure of the line 15.
  • the coupling device 104 comprises a first coupling transformer 11 and a second coupling transformer 12, which are set up for the transformation from a higher voltage level to a lower voltage level (or vice versa).
  • the line 15 can be interrupted by means of a switch 18.
  • a capacitor 25 is provided to compensate for stray reactances of the two coupling transformers 11 and 12.
  • FIG. 3 shows a converter arrangement 1.
  • the same and similar components are in the Figures 1 , 2 and 3 provided with the same reference numerals.
  • the converter arrangement 1 comprises a converter 2 for converting electrical power.
  • the converter 2 has a DC voltage side 21 for connection to a two-pole DC voltage line 3.
  • the converter 2 has an AC voltage side 22 which is set up for connection to a three-phase AC voltage line 4.
  • the AC voltage line 4 connects the converter 2 to a transformer-parallel circuit 5.
  • the transformer-parallel circuit 5 comprises a first transformer branch 51 and a second transformer branch 52, which are connected in parallel to one another.
  • the first transformer branch 51 connects the converter 2 to a primary winding 61 of a first transformer 6.
  • the second transformer branch 52 connects the converter 2 to a primary winding 71 of a second transformer 7.
  • a secondary winding 62 of the first transformer 6 and a secondary winding 72 of the second transformer 7 are each connected to an alternating voltage network 28.
  • the two primary windings 61, 71 are implemented as triangular windings in the exemplary embodiment shown.
  • the two secondary windings 62, 72 are implemented as star windings.
  • the first transformer branch 51 has a series connection of a first circuit breaker 81 and a first disconnector 91.
  • the second transformer branch 52 has a series circuit comprising a second circuit breaker 82 and a second disconnector 92.
  • the circuit breakers 81, 82 and the circuit breakers 91, 92 can each by means of one in the Figure 3 control not shown graphically can be controlled. It should be noted here that the representation of the Figure 3 shows only one of the three phases of the AC voltage line 4 explicitly. In the three-phase version of the converter arrangement 1, the circuit breakers and disconnectors shown are arranged in each phase accordingly.
  • the converter arrangement 1 also comprises a low-voltage connection 10.
  • the low-voltage connection 10 extends between a potential point 41 between the first circuit breaker 81 and the first disconnector 91 and a potential point 42 between the second circuit breaker 82 and the second disconnector 92.
  • each phase line comprises its own low-voltage connection corresponding to the structure of the low-voltage connection 10.
  • the function of the low-voltage connection 10 corresponds to that of the coupling device 104 Figures 1 and 2 .
  • the low-voltage connection 10 comprises a first voltage converter 11 and a second voltage converter 12, which are set up for the transformation from high voltage to low voltage (or vice versa).
  • a low-voltage line 15 extends between the first voltage converter 11 and the second voltage converter 12.
  • the low-voltage line 15 has a first grounding device 16 and a second grounding device 17. By means of the two grounding devices 16 and 17, the low-voltage line 15 can be grounded on one pole.
  • the low-voltage connection 10 can be separated by means of a first load-break switch 18 and a second load-break switch 19 by interrupting the low-voltage line 15.
  • the low-voltage connection 10 also includes an on-resistance 24 that can be bridged by means of a bridging device 23.
  • a low-voltage capacitor 25 is provided.
  • a discharge resistor 26, which is set up for the controlled discharge of the low-voltage capacitor 25, is arranged in a parallel connection to the low-voltage capacitance 25.
  • the low-voltage capacitance 25 is connected in parallel with an overvoltage arrester 27.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Gas-Insulated Switchgears (AREA)

Claims (15)

  1. Système (100, 200) d'installation de distribution ayant une première branche (51), qui connecte une première installation (101) électrique du côté d'un sectionneur à une deuxième installation (102) électrique et au moins un circuit série composé d'un premier sectionneur (91) et d'un premier disjoncteur (81),
    un dispositif (104) de connexion, qui est conçu pour la compensation de potentiel entre un premier point (41) de potentiel entre le premier sectionneur (91) et le premier disjoncteur (81) et un deuxième point (42) de potentiel dans le système (200) d'installation de distribution pour une fermeture sans tension du premier sectionneur (91), caractérisé en ce que
    le système (100) d'installation de distribution comprend, en outre, une deuxième branche (52), qui connecte la première installation (101) à une troisième installation (103) électrique et qui a au moins un circuit série composé d'un deuxième sectionneur (92) et d'un deuxième disjoncteur (82), les première et deuxième branches (51, 52) étant montées suivant un circuit en parallèle, l'une par rapport à l'autre, la première et la deuxième branche (51, 52) étant connectées électriquement entre elles au moyen du dispositif (104) de connexion, de manière à pouvoir obtenir une compensation de potentiel entre un premier point (41) de potentiel entre le premier sectionneur (91) et le premier disjoncteur (81) et un deuxième point (42) de potentiel entre le deuxième sectionneur (92) et le deuxième disjoncteur (82).
  2. Système (200) d'installation de distribution suivant la revendication 1, dans lequel le deuxième point (42) de potentiel est monté entre le deuxième sectionneur et le deuxième disjoncteur.
  3. Système (100) d'installation de distribution suivant l'une des revendications 1 ou 2, dans lequel le dispositif (104) de connexion comprend des premier et deuxième transformateurs (11, 12) de connexion, ainsi qu'une ligne (15) reliant les deux transformateurs (11, 12) de connexion.
  4. Système (100) d'installation de distribution suivant la revendication 3, dans lequel les premier et deuxième transformateurs (11, 12) de connexion sont des Power Voltage Transformer.
  5. Système (100) d'installation de distribution suivant l'une des revendications 3 ou 4, dans lequel les transformateurs (11, 12) de connexion sont reliés par un condensateur (25).
  6. Système (100) d'installation de distribution suivant l'une des revendications 3 à 5, dans lequel la ligne (15) comprend un ou plusieurs interrupteurs (18, 19) pour interrompre la ligne (15).
  7. Système d'installation de distribution suivant l'une des revendications précédentes, dans lequel
    la première installation est un onduleur,
    la deuxième installation est un premier transformateur,
    la troisième installation est un deuxième transformateur, les premier et deuxième transformateurs constituant un circuit de transformateur en parallèle,
    le dispositif de connexion comprend une liaison de basse tension,
    la première branche est une première branche de transformateur,
    la deuxième branche est une deuxième branche de transformateur, l'onduleur (2) étant connecté, avec possibilité de coupure, du côté de la tension alternative, à un circuit (5) parallèle de transformateur, dans lequel le circuit (5) parallèle de transformateur
    - comporte la première branche (51) de transformateur, qui relie l'onduleur (2) à un enroulement (61) primaire du premier transformateur (6) et comprend
    - un circuit série composé du premier sectionneur (91) et du premier disjoncteur (81), et
    - comporte la deuxième branche (52) de transformateur, qui est parallèle à la première branche (51) de transformateur, qui relie l'onduleur (2) à un enroulement (71) primaire du deuxième transformateur (7) et qui comprend un circuit série composé du deuxième sectionneur (92) et du deuxième disjoncteur (82), dans lequel
    les première et deuxième branches (51, 52) de transformateur peuvent être reliées l'une à l'autre au moyen de la liaison (10) de basse tension, la liaison (10) de basse tension reliant le premier point (41) de potentiel, entre le premier sectionneur (91) et le premier disjoncteur (81), au deuxième point (42) de potentiel entre le deuxième sectionneur (92) et le deuxième disjoncteur (82).
  8. Système d'installation de distribution suivant la revendication 7, dans lequel la liaison (10) de basse tension comprend des premier et deuxième transformateurs (11, 12) de tension, ainsi qu'une ligne (15) de basse tension reliant les deux transformateurs (11, 12) de tension.
  9. Système d'installation de distribution suivant la revendication 8, dans lequel les premier et deuxième transformateurs (11, 12) de tension sont des Power Voltage Transformer.
  10. Système d'installation de distribution suivant l'une des revendications 8 ou 9, dans lequel la liaison (10) de basse tension comprend un système (13, 14) de mesure pour relever le courant dans la ligne (15) de basse tension.
  11. Système d'installation de distribution suivant l'une des revendications 8 à 10, dans lequel la liaison (10) de basse tension a un condensateur (25) de basse tension.
  12. Système d'installation de distribution suivant la revendication 11, dans lequel la liaison (10) de basse tension comprend un parafoudre (27), qui est monté suivant un circuit en parallèle au condensateur (25) de basse tension.
  13. Système d'installation de distribution suivant l'une des revendications 11 ou 12, dans lequel la liaison (10) de basse tension a une résistance (26) de décharge.
  14. Système d'installation de distribution suivant l'une des revendications 7 à 13, dans lequel la liaison (10) de basse tension comprend au moins un sectionneur (18, 19) en charge pour interrompre la liaison (10) de basse tension.
  15. Procédé de protection d'un système d'installation de distribution suivant l'une des revendications 7 à 14, dans lequel
    on produit une compensation de potentiel entre
    - le premier point (41) de potentiel entre le premier sectionneur (91) et le premier disjoncteur (81) et
    - le deuxième point (42) de potentiel entre le deuxième sectionneur (92) et le deuxième disjoncteur (82)
    en reliant entre eux, d'une manière conductrice de l'électricité, les deux points (41, 42) de potentiel au moyen de la liaison (10) de basse tension, avant une fermeture du premier sectionneur (91) ou du deuxième sectionneur (92).
EP16710145.0A 2016-03-11 2016-03-11 Circuit de commutation, convertisseur comportant une installation de commutation ainsi qu'un procédé de protection du circuit convertisseur Active EP3417468B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2016/055333 WO2017152999A1 (fr) 2016-03-11 2016-03-11 Système de commutation, dispositif convertisseur muni d'un système de commutation et procédé de protection du dipositif convertisseur

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EP3417468A1 EP3417468A1 (fr) 2018-12-26
EP3417468B1 true EP3417468B1 (fr) 2020-11-18

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WO (1) WO2017152999A1 (fr)

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SE517814C2 (sv) * 1999-11-18 2002-07-16 Abb Ab Elektrisk kopplare, användning av en kopplare, anläggning för ett flerfasnät, ställverk och förfarande för brytning av en strömväg
EP2671297B1 (fr) 2011-02-01 2018-05-02 Siemens Aktiengesellschaft Méthode pour éliminer un défaut sur une ligne haute tension à courant continu, dispositif pour la transmission d'un courant électrique sur une ligne haute tension à courant continu et convertisseur
DE102014008706A1 (de) * 2014-06-18 2015-12-24 Ellenberger & Poensgen Gmbh Trennschalter zur Gleichstromunterbrechung

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EP3417468A1 (fr) 2018-12-26
WO2017152999A1 (fr) 2017-09-14

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