WO2023117101A1 - Procédé de coupure d'un courant continu dans un système à courant continu à haute tension à bornes multiples - Google Patents

Procédé de coupure d'un courant continu dans un système à courant continu à haute tension à bornes multiples Download PDF

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Publication number
WO2023117101A1
WO2023117101A1 PCT/EP2021/087467 EP2021087467W WO2023117101A1 WO 2023117101 A1 WO2023117101 A1 WO 2023117101A1 EP 2021087467 W EP2021087467 W EP 2021087467W WO 2023117101 A1 WO2023117101 A1 WO 2023117101A1
Authority
WO
WIPO (PCT)
Prior art keywords
switch
hvdc
current
direct current
converter
Prior art date
Application number
PCT/EP2021/087467
Other languages
English (en)
Inventor
Sasitharan Subramanian
Ying-Jiang Hafner
Saurav ROY-CHOUDHURY
Original Assignee
Hitachi Energy Switzerland Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Energy Switzerland Ag filed Critical Hitachi Energy Switzerland Ag
Priority to PCT/EP2021/087467 priority Critical patent/WO2023117101A1/fr
Publication of WO2023117101A1 publication Critical patent/WO2023117101A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—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
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H02H7/268—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for dc systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/0074—Plural converter units whose inputs are connected in series
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/0077—Plural converter units whose outputs are connected in series
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/008—Plural converter units for generating at two or more independent and non-parallel outputs, e.g. systems with plural point of load switching regulators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/021—Details concerning the disconnection itself, e.g. at a particular instant, particularly at zero value of current, disconnection in a predetermined order
    • H02H3/023—Details concerning the disconnection itself, e.g. at a particular instant, particularly at zero value of current, disconnection in a predetermined order by short-circuiting
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/083—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the ignition at the zero crossing of the voltage or the current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
    • H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]

Definitions

  • the present disclosure relates to the field of multi-terminal high-voltage direct current systems, and more particularly to breaking direct current in such systems.
  • a multi-terminal high-voltage direct current (MT HVDC) system is a viable solution to transmit and distribute power over long distances by means of direct current (DC) at high voltages and high currents.
  • the MT HVDC system comprises AC/DC converters, which are connected to AC systems at separate sites, and which are interconnected via DC links.
  • the sites can be power generation sites and/or power consumption sites.
  • a DC breaker is able to break an online high direct current but is complex and expensive.
  • a high speed switch is similar to an ordinary AC breaker without DC current breaking capability. Similar to an AC breaker it is opened principally at zero current. A high speed switch is a cost-effective solution. Compared to a DC breaker, an HSS is a less complex, more reliable and matured device. However, there are certain difficulties in conjunction with opening an HSS in an MT HVDC system.
  • the present disclosure seeks to at least partly remedy the above discussed problems. To achieve this, a method of breaking a direct current and a power transfer system, as defined by the independent claims, are provided. Embodiments are provided in the dependent claims.
  • MT HVDC multi-terminal high-voltage direct current
  • HVDC high-voltage direct current
  • the generation of an alternating current comprises generating the alternating current by means of at least one of the first and second converter devices. In some embodiments the switching the switch to an open state is performed at a zero crossing of the resulting current through the switch.
  • the switching of the switch to an open state comprises detecting zero crossing of the resulting current and timely sending an opening command to the switch.
  • the timely sending of an opening command to the switch comprises estimating a zero crossing point of time when a zero crossing is going to occur, and sending the opening command a time period before the estimated zero crossing point of time, wherein the time period is based on a reaction time it takes from sending the opening command until the switch opens.
  • the minimizing of a direct current through the switch comprises minimizing power transfer between the first converter device and the second converter device.
  • an MT HVDC system comprising a first converter device, a second converter device, wherein the first and second converter devices are interconnected via HVDC links, and a switch, arranged in one of the HVDC links.
  • the MT HVDC system is arranged to break a direct current through the switch by minimizing the direct current through the switch, generating a alternating current circulating between the first converter device and the second converter device via the HVDC links and through the switch, wherein the alternating current is superimposed on the direct current thereby causing a resulting current, and has a magnitude being large enough to generate zero crossings of the resulting current through the switch, and, during the generation of the alternating current, switching the switch to an open state.
  • At least one of the first and second converter devices is arranged to generate the alternating current.
  • the switch is arranged to receive an opening command and to switch to an open state at a zero crossing of the resulting current.
  • the switch is an HSS.
  • the HVDC links comprise at least one pole bus and a neutral bus, which are used for circulating the alternating current.
  • the MT HVDC system is arranged in a bi-pole configuration, wherein said at least one pole bus comprises a positive pole bus comprising a first switch, and a negative pole bus comprising a second switch.
  • renewable power farm is to be understood as a power plant, such as a wind farm or solar farm, where several individual renewable power generators, e.g. wind turbines, solar panels, or wave power generators, are installed at one site.
  • renewable power generators e.g. wind turbines, solar panels, or wave power generators
  • switch includes any kind of switch that is applicable for the purposes as set forth herein, for instance the different breakers mentioned above.
  • Figure 1 schematically illustrates a block diagram of an MT HVDC system for executing the present method
  • Figure 2 schematically illustrates a block diagram, on a more detailed level, of an example of an MT HVDC system according to an aspect of the present disclosure
  • Fig. 3 is a schematic flow chart illustrating an embodiment of the method according to the present disclosure.
  • Fig. 1 most schematically illustrates an example of an MT HVDC system 1 , in which system the method may be performed.
  • the MT HVDC system 1 may comprise a plurality of converter stations 12, 13, 14, 15 being interconnected via HVDC links.
  • a first converter station 12 thereof may comprise a first converter device 2 and a second converter station 13 thereof may comprise a second converter device 3, which converter devices 2, 3 are interconnected via first and second HVDC links 4, 5.
  • the MT HVDC system 1 may comprise a switch arranged in one of the first and second HVDC links 4, 5.
  • the MT HVDC system 1 may comprise several switches. In the illustrated general example in figure 1 a first switch 6 is arranged in the first HVDC link 4 and a second switch 7 is arranged in the second HVDC link 5.
  • the method may comprise minimizing the direct current through the switch, step S1 in Fig. 3. For instance, the direct current is minimized in the first HVDC link 4 and, thus, through the first switch 6.
  • the method may further comprise generating an alternating current circulating between the first converter device 2 and the second converter device 3, via the HVDC links 4, 5 and through the first switch 6, step S2. Thereby, the alternating current is superimposed on the direct current of the first HVDC link 4, thereby causing a resulting current.
  • the magnitude of the alternating current is chosen large enough to generate zero crossings of the resulting current through the first switch 6. This means that the magnitude of the alternating current should be larger than the magnitude of the direct current after minimizing the direct current.
  • the method may comprise switching the first switch 6 to an open state during the generation of the alternating current, by sending an opening command to the first switch 6, step S3. Since the alternating current causes the resulting current to repeatedly be zero, the opening of the switch will occur at a zero crossing of the resulting current through the first switch 6, i.e. when the resulting current is approximately zero or a negligibly short time period before the resulting current becomes approximately zero. Since this method ensures that the current through the first switch 6 is small enough, the opening of the first switch 6 will be performed without any detrimental consequences. It is preferable that the measures are performed in the order presented above.
  • the generation of the alternating current may be performed by one or both of the first and second converter devices 2, 3.
  • the switching of the first switch 6 to an open state may comprise sending the opening command at a predetermined time after the generation of the alternating current has started. This means that the resulting current may not be approximately zero at the very opening moment. If the switch 6 is opened at a point of time where the resulting current is large enough to cause an arc, due to the alternating current the time will be short before the resulting current has reached a value close to zero and the arc will be automatically extinguished. From that point of time the switch be electrically open. By generating an alternating current which has a sufficiently high frequency the maximum possible duration of such an arc will be negligibly short, that is short enough not to cause any damage on the switch. A typical frequency may be , for example, 100-400 Hz.
  • the switching of the first switch 6 to an open state may comprise measuring the resulting current, detecting, or determining, zero crossings of the resulting current, and timely sending an opening command to the first switch 6.
  • the operation of timely sending an opening command to the switch may comprise estimating a future zero crossing point of time when a zero crossing is going to occur at the first switch 6, and sending the opening command a time period before the estimated zero crossing point of time. This time period is determined on basis of a known reaction time that it takes from sending the opening command until the first switch 6 actually opens. This timely sending of the opening command increases the probability that the resulting current through the first switch 6 at the very opening thereof is approximately zero or at least substantially lower than a current level where there is a risk of damaging the switch.
  • Reason for opening the switch may be e.g. a need for reconfiguring the MT HVDC system or a fault occurring in the MT HVDC system.
  • the magnitude of the circulated alternating current may be selected on basis of the accuracy of the device used for current measurements.
  • the minimizing of a direct current through the switch 6, 7 comprises minimizing power transfer between the first converter device 2 and the second converter device 3.
  • the first and second switches 6, 7 may be high speed switches (HSS) as described above.
  • HSS high speed switches
  • each converter station 12-15 may comprise a controller 8, 9, 16, 17, which controls the execution of the method.
  • the controller s, 9, 16, 17 may comprise a current measurement device 10, 11 , 18, 19 for performing the above-mentioned current measurements.
  • Each converter station 12-15 may be connected to an AC system, such as an AC grid.
  • the HVDC links 4, 5 of the MT HVDC system 1 comprise at least two HVDC links, one of which is a pole bus 4, and one of which is a neutral bus 5, or another pole bus.
  • the MT HVDC system 20 may be configured in a bipole configuration, as schematically illustrated in figure 2.
  • the exemplifying MT HVDC system 20 may generally comprise four terminals connected to different AC systems, and interconnected HVDC links constituted by a positive pole bus, a negative pole bus, and a neutral bus.
  • Each terminal of the MT HVDC system 20 comprises a converter station, which in turn comprises two converter devices.
  • the MT HVDC system 20 comprises a first converter station 21 comprising first and second converter devices 25a, 25b, a second converter station 22 comprising first and second converter devices 26a, 26b, a third converter station 23 comprising first and second converter devices 27a, 27b, and a fourth converter station 24 comprising first and second converter devices 28a, 28b.
  • the first and second converter stations 21 , 22 are interconnected via a first set of HVDC links 29, the first and third converter stations 21 , 23 are interconnected via a second set of HVDC links 30, and the second and fourth converter stations 22, 24 are interconnected via a third set of HVDC links 31 .
  • the first set of HVDC links 29 comprises a first HVDC link constituting a positive pole bus 32, a second HVDC link constituting a neutral bus 33, and a third HVDC link constituting a negative pole bus 34.
  • the other sets of HVDC links 30, 31 comprise corresponding buses.
  • the first converter devices 25a, 26a of the first and second converter stations 21 , 22 are connected to the positive pole bus 32, and to the neutral bus 33 of the first set of HVDC links 29, and the second converter devices 25b, 26b of the first and second converter stations 21 , 22 are connected to a negative pole bus 34 and to the neutral bus 33 of the first set of HVDC links 29.
  • the corresponding converter devices 27a, 27b, 28a, 28b of the third and fourth converter stations 23, 24 are correspondingly connected to corresponding buses 35, 36, 37, 38, 39, 40 of the second and third sets of HVDC links 30, 31 .
  • First and second pole switches 41 , 42 are arranged in the positive pole bus 32 of the first set of HVDC links 29, the first pole switch 41 being controlled from the first converter station 21 , and the second pole switch 42 being controlled from the second converter station 22.
  • third and fourth pole switches 43, 44 are arranged in the negative pole bus 34 of the first set of HVDC links 29.
  • Each one of the first and second converter stations 21 , 22 comprises a controller, which in turn comprises a current measurement device, however not shown in figure 2 for reasons of clarity of the figure. Reference is made to figure 1 in this respect.
  • the direct current through the first pole switch 41 is first minimized by rebalancing the power between the converter stations.
  • the rebalancing of power may be done by minimizing power transfer between the first converter station 21 and the second converter station 22 by transferring active power generated by the first converter station 21 to merely the third converter station 23, and correspondingly matching the transfer of active power from the second converter station 22 to the fourth converter station 24.
  • the controller of the first converter station 21 initiates the generation of an alternating current from the first converter station 21 via the positive pole bus 32, to the second converter station 22, and back through the neutral bus 33.
  • the alternating current is generated by the first converter device 25a of the first converter station 21 , or by the first converter device 26a of the second converter station 22, or both, and circulated via the positive pole bus 32 and the neutral bus 33.
  • the resulting current through the first pole switch 41 is measured, and an opening command is sent by the controller of the first converter station 21 as described in more detail above.
  • the second pole switch 42 may be opened in a similar way.
  • one of the third and fourth pole switches 43, 44 may be opened at about the same time as the first/second pole switch 41 , 42. That is done by generating an additional alternating current by either or both of the second converter devices 25b, 26b of the first and second converter stations 21 , 22 and circulating it through the neutral bus 33 and the negative pole bus 34 and opening the third or fourth switch 43, 44 when it is ascertained that the resulting current has zero crossings.
  • switches may be opened instead of the ones mentioned above.
  • a switch 45, 46 in the neutral bus 33 may be opened.
  • the AC systems may be, for example, AC grids, such as national transmission systems, power generation sites, such as offshore wind farms OWFs, land based WF, or any other kind of power generation site using the MT HVDC for long distance transmission of the generated power.
  • AC grids such as national transmission systems
  • power generation sites such as offshore wind farms OWFs, land based WF, or any other kind of power generation site using the MT HVDC for long distance transmission of the generated power.
  • a typical use, but still merely one of many different examples, of MT HVDC systems is to integrate separate power production sites and transmit the generated power to a central AC power transmission system.
  • HVDC systems can be used for integrating the OWFs and transmitting power to onshore power transmission systems.
  • the HVDC systems are interconnected to form multiterminal HVDC grids comprising several HVDC links, each link comprising several HVDC links extending between converter devices.
  • multiterminal HVDC grids comprising several HVDC links, each link comprising several HVDC links extending between converter devices.
  • the availability of renewable power during unforeseen converter trips increase in comparison to only point to point HVDC systems. If one part of the grid faults or requires maintenance, other HVDC links can be operated separately. There are many reconfiguration possibilities in the multi-terminal HVDC grid.

Abstract

La présente invention concerne un procédé de coupure d'un courant continu dans un système à courant continu à haute tension à bornes multiples (MT HVDC) comprenant un premier dispositif convertisseur (2), un second dispositif convertisseur (3), les premier et second dispositifs convertisseurs étant interconnectés par des liaisons à courant continu à haute tension (HVDC), et un commutateur (6), disposé dans l'une des liaisons HVDC. Le procédé consiste à : minimiser le courant continu à travers le commutateur, générer un courant alternatif circulant entre le premier dispositif convertisseur et le second dispositif convertisseur, par l'intermédiaire des liaisons CC et à travers le commutateur, le courant alternatif étant superposé au courant continu, provoquant ainsi un courant résultant, et ayant une magnitude suffisamment importante pour générer des passages à zéro du courant résultant à travers le commutateur ; et pendant la génération du courant alternatif, commuter le commutateur à l'état ouvert.
PCT/EP2021/087467 2021-12-23 2021-12-23 Procédé de coupure d'un courant continu dans un système à courant continu à haute tension à bornes multiples WO2023117101A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2021/087467 WO2023117101A1 (fr) 2021-12-23 2021-12-23 Procédé de coupure d'un courant continu dans un système à courant continu à haute tension à bornes multiples

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2021/087467 WO2023117101A1 (fr) 2021-12-23 2021-12-23 Procédé de coupure d'un courant continu dans un système à courant continu à haute tension à bornes multiples

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120201059A1 (en) * 2009-09-11 2012-08-09 Abb Research Ltd. Fault current limitation in dc power transmission systems
US20130193766A1 (en) * 2012-01-31 2013-08-01 Atlantic Grid Operations A., Llc Control and protection of a dc power grid
US20160105014A1 (en) 2014-10-10 2016-04-14 Lsis Co., Ltd Direct current circuit breaker and method using the same
GB2548915A (en) * 2016-04-01 2017-10-04 General Electric Technology Gmbh High voltage direct current switchgear

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120201059A1 (en) * 2009-09-11 2012-08-09 Abb Research Ltd. Fault current limitation in dc power transmission systems
US20130193766A1 (en) * 2012-01-31 2013-08-01 Atlantic Grid Operations A., Llc Control and protection of a dc power grid
US20160105014A1 (en) 2014-10-10 2016-04-14 Lsis Co., Ltd Direct current circuit breaker and method using the same
GB2548915A (en) * 2016-04-01 2017-10-04 General Electric Technology Gmbh High voltage direct current switchgear

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