WO2014142974A1 - Procédés et systèmes de disjoncteur de courant continu - Google Patents

Procédés et systèmes de disjoncteur de courant continu Download PDF

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Publication number
WO2014142974A1
WO2014142974A1 PCT/US2013/032131 US2013032131W WO2014142974A1 WO 2014142974 A1 WO2014142974 A1 WO 2014142974A1 US 2013032131 W US2013032131 W US 2013032131W WO 2014142974 A1 WO2014142974 A1 WO 2014142974A1
Authority
WO
WIPO (PCT)
Prior art keywords
current
conductive path
gas tube
input portion
output portion
Prior art date
Application number
PCT/US2013/032131
Other languages
English (en)
Inventor
Timothy John Sommerer
James William Bray
Original Assignee
General Electric Company
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 General Electric Company filed Critical General Electric Company
Priority to PCT/US2013/032131 priority Critical patent/WO2014142974A1/fr
Publication of WO2014142974A1 publication Critical patent/WO2014142974A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
    • H01H9/547—Combinations of mechanical switches and static switches, the latter being controlled by the former
    • 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
    • H01H33/16—Impedances connected with contacts
    • H01H33/161—Variable impedances
    • 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
    • H01H33/596—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 for interrupting DC

Definitions

  • the field of the disclosure relates generally to circuit breakers and, more particularly, to direct current circuit breaker methods and systems.
  • Many known transmission and distribution systems include mechanical isolation devices, e.g., circuit breakers, to interrupt current flowing between two points of the system.
  • AC alternating current
  • the zero crossings of the current help prevent and/or extinguish an arc generated by opening the contacts of a circuit breaker.
  • DC direct current
  • opening of mechanical isolation devices in a DC distribution system produces a greater risk of arcing and a decrease of service life of the circuit breaker.
  • Some DC circuit breakers utilize semiconductor switches to interrupt the DC current flowing through the circuit breaker.
  • the open circuit standoff voltage of each semiconductor switch is relatively low (about 10 kilovolts or less) and many semiconductor switches must be stacked together to handle the high voltages (300-lOOOkV) present in a high voltage DC distribution system.
  • multiple stacks of series connected semiconductor switches are often coupled in parallel to create a circuit breaker capable of handling the currents in a high voltage DC distribution system.
  • a direct current (DC) circuit breaker includes a breaker assembly configured to interrupt a DC current, and a controller.
  • the breaker assembly includes an input portion, an output portion, and a gas tube switch coupled between the input portion and the output portion.
  • the gas tube switch includes an anode, a cathode, and a control grid.
  • the controller is configured to selectively operate the breaker assembly to interrupt the DC current between the input portion and the output portion.
  • a method for use in interrupting direct current (DC) between an input portion and an output portion of a breaker assembly includes detecting a fault condition, and interrupting, by a controller, a DC current between the input portion and the output portion of the breaker assembly in response to the detected fault condition by selective operation of a gas tube switch coupled between the input portion and the output portion.
  • the gas tube switch includes an anode, a cathode, and a control grid.
  • a breaker assembly for use in a direct current (DC) circuit breaker includes an input portion, an output portion, and a gas tube switch coupled between said input portion and said output portion.
  • the gas tube switch includes an anode, a cathode, and a control grid.
  • FIG. 1 is a block diagram of an exemplary gas tube switch.
  • FIG. 2 is a block diagram of an exemplary direct current (DC) circuit breaker including the gas tube switch shown in FIG. 1.
  • DC direct current
  • FIG. 3 is a block diagram of another exemplary DC circuit breaker including the gas tube switch shown in FIG. 1.
  • FIG. 4 is a flow diagram of an exemplary method for use in interrupting a DC current.
  • the exemplary DC circuit breakers provide an efficient method for providing circuit protection in DC power distribution systems.
  • the example embodiments include one or more gas tube switches, which are high voltage and high power capable gas tube switches.
  • the gas tube switches are capable of opening very quickly and can standoff hundreds of kilovolts (kV).
  • the tubes can be combined in series and/or parallel to increase the voltage and/or current carrying capacity of the DC circuit breakers.
  • FIG. 1 is a diagram of an exemplary gas tube switch 100.
  • Gas tube switch 100 includes a housing 102, an anode 104, cathode 106, and a control grid 108 (also referred to as a switching grid).
  • Anode 104, cathode 106, and control grid 108 are disposed within an interior portion 109 of housing 102.
  • Anode 104, cathode 106, and control grid 108 are sometimes referred to herein as electrodes.
  • Interior portion 109 is filled with a gas.
  • the gas is hydrogen at a pressure of 0.1-1 torr (13-133 Pascal) at ambient temperature.
  • gas tube switch 100 may be any other suitable gas, such as helium, or gases that enable operation of gas tube switch 100 as described herein.
  • gas tube switch includes one or more magnets (not shown) configured to generate a magnetic field (which may be constant or variable) to alter a current carrying capacity of gas tube switch 100.
  • gas tube switch 100 may include one or more additional electrodes, including for example one or more grids that maintain a weak ionized gas within gas tube switch 100 to facilitate closing gas tube switch 100 without, for example, use of an ignitor.
  • the exemplary gas tube switch 100 is a plane-parallel gas tube switch and cathode 106 is a planar cathode.
  • gas tube switch 100 and cathode 106 may have any suitable configuration enabling for operation as described herein.
  • cathode 106 is a liquid cathode.
  • Cathode 106 is liquid at its operating temperature.
  • cathode 106 is made of gallium metal, which is liquid above about thirty degrees centigrade (°C).
  • cathode 106 may be made of any other suitable liquid material that enables gas tube switch 100 to operate as described herein.
  • cathode 106 is made of bismuth, tin, lead, mercury, sodium and/or lithium.
  • cathode 106 is liquid at room temperature.
  • the exemplary gas tube switch 100 is a cold cathode gas tube switch and the cathode 106 is not heated to permit the gas tube switch 100 to operate.
  • cathode 106 may be heated to liquefy cathode 106 and/or otherwise permit operation of gas tube switch 100.
  • Anode 104 is a solid metal anode. In other embodiments, anode 104 is a liquid anode.
  • Control grid 108 is an electrode that is used to selectively control gas tube switch 100 through application, removal, and/or variation of a voltage applied control grid 108.
  • the exemplary embodiment includes a single control grid 108, other embodiments include more than one control grid 108.
  • gas tube switch is open (e.g., turned off, not conducting, etc.)
  • the hydrogen gas insulates anode 104 from cathode 106.
  • gas tube switch 100 When gas tube switch 100 is closed (e.g., turned on, conducting, etc.), the hydrogen gas within housing 102 becomes ionized (i.e., some portion of the hydrogen molecules are dissociated into free electrons, hydrogen molecular ions, hydrogen atoms, hydrogen atomic ions, etc.), resulting in an electrically conductive plasma. Electrical continuity is maintained between cathode 106 and the hydrogen gas through secondary electron emission by ion impact. Energetic (e.g., 100-200 electron volts (eV)) ions from the plasma are drawn to the surface of cathode 106 by a strong electric field. The impact of the ions on cathode 106 releases secondary electrons from the surface of cathode 106 into the gas phase.
  • eV electron volts
  • the material of cathode 106 does not evaporate to an extent that it substantially changes the properties of the hydrogen gas, either in its insulating state, or in its conducting state. Alternatively, there is some interaction between the gas and evaporated material from cathode 106.
  • FIG. 2 is a block diagram of an exemplary direct current (DC) circuit breaker 210 including gas tube switch 100.
  • circuit breaker 210 may include any other suitable gas tube switch 100 that permits operation of circuit breaker 210 as described herein.
  • Electrical current flows from power through DC circuit breaker 210, for example from a source to a load.
  • DC circuit breaker 210 includes a controller 215 and a breaker assembly 216.
  • Breaker assembly 216 has an input portion 218 for receiving DC current and an output portion 220 for outputting the received DC current.
  • DC current may flow in either direction between input portion 218 and output portion 220.
  • Gas tube switch 100 is coupled between input portion 218 and output portion 220.
  • Controller 215 is configured to selectively operate breaker assembly 216 to interrupt DC current between input portion 218 and output portion 220.
  • gas tube switch 100 When gas tube switch 100 is open, DC current cannot flow through breaker assembly 216. Conversely, when gas tube switch 100 is closed, DC current can flow through breaker assembly 216.
  • breaker assembly 216 may include more than one gas tube switch 100 coupled together in series and/or in parallel to increase the standoff voltage capacity and/or current capacity of breaker assembly 216.
  • a sensor 222 is coupled to input portion 218.
  • Sensor 222 is a current sensor, such as a current transformer, a Rogowski coil, a Hall-effect sensor, and/or a shunt that measures a current flowing through breaker assembly 216.
  • sensor 222 may include any other sensor that enables DC circuit breaker 210 to function as described herein.
  • Sensor 222 generates a signal representative of the measured or detected current (hereinafter referred to as "current signal”) flowing through breaker assembly 216.
  • sensor 222 transmits the current signal to controller 215.
  • Controller 215 is configured to control breaker assembly, and more particularly gas tube switch 100, to interrupt a DC current provided upon detection of a fault condition.
  • controller 215 determines that the current signal, and/or the current represented by the current signal, exceeds a current threshold, a fault condition is determined to exist and controller 215 opens gas tube switch 100 to interrupt the DC current.
  • DC circuit breaker 210 includes more than one sensor 222.
  • controller 215 is additionally or alternatively configured to interrupt a DC current in response to a signal other than the current signal, e.g., a control signal from another controller, a different sensor signal, etc.
  • Controller 215 includes a processor 224 and a memory device 226 coupled to processor 224. Based at least in part on the current data, processor 224 determines when the DC current through breaker assembly 216 exceeds a protection threshold and controls breaker assembly 216 to interrupt the DC current upon determining that the current exceeds the protection threshold.
  • processor refers generally to any programmable system including systems and microcontrollers, reduced instruction set circuits (RISC), application specific integrated circuits (ASIC), programmable logic circuits, and any other circuit or processor capable of executing the functions described herein. The above examples are exemplary only, and thus are not intended to limit in any way the definition and/or meaning of the term "processor.”
  • Memory device 226 stores program code and instructions, executable by processor 224, to control breaker assembly 216.
  • Memory device 226 may include, but is not limited to only include, non-volatile RAM (NVRAM), magnetic RAM (MRAM), ferroelectric RAM (FeRAM), read only memory (ROM), flash memory and/or Electrically Erasable Programmable Read Only Memory (EEPROM). Any other suitable magnetic, optical and/or semiconductor memory, by itself or in combination with other forms of memory, may be included in memory device 226.
  • Memory device 226 may also be, or include, a detachable or removable memory, including, but not limited to, a suitable cartridge, disk, CD ROM, DVD or USB memory.
  • FIG. 3 is a block diagram of an exemplary direct current (DC) circuit breaker 310 including gas tube switch 100.
  • DC circuit breaker 310 includes a controller 315 and a breaker assembly 316.
  • Breaker assembly 316 has an input portion 318 and an output portion 320.
  • DC current may flow in either direction between input portion 318 and output portion 320.
  • Gas tube switch 100 is coupled between input portion 318 and output portion 320.
  • Controller 315 is configured to selectively operate breaker assembly 316 to interrupt DC current between input portion 318 and output portion 320.
  • breaker assembly 316 may include more than one gas tube switch 100 coupled together in series and/or in parallel to increase the standoff voltage capacity and/or current capacity of breaker assembly 316.
  • Sensor 222 is coupled to input portion 318. Sensor 222 generates a signal (not shown) representative of the measured or detected current (hereinafter referred to as "current signal") flowing through breaker assembly 316 and transmits the current signal to controller 315. Controller 315 is configured to control breaker assembly 316 to interrupt the DC current upon detection of a fault condition. For example, if controller 315 determines that the current signal, and/or the current represented by the current signal, exceeds a current threshold, a fault condition is determined to exist and controller 315 operates breaker assembly 316 to interrupt the DC current.
  • DC circuit breaker 310 includes more than one sensor 222.
  • controller 315 is additionally or alternatively configured to interrupt the DC current in response to a signal other than the current signal, e.g., a control signal from another controller, a different sensor signal, etc.
  • Controller 315 includes a processor 324 and a memory device 326. Based at least in part on the current data, processor 324 determines when the DC current through breaker assembly 316 exceeds a protection threshold and controls breaker assembly 316 to interrupt the DC current upon determining that the current exceeds the protection threshold.
  • Memory device 326 stores program code and instructions, executable by processor 324, to control breaker assembly 316.
  • Memory device 326 may include, but is not limited to only include, non-volatile RAM (NVRAM), magnetic RAM (MRAM), ferroelectric RAM (FeRAM), read only memory (ROM), flash memory and/or Electrically Erasable Programmable Read Only Memory (EEPROM). Any other suitable magnetic, optical and/or semiconductor memory, by itself or in combination with other forms of memory, may be included in memory device 326.
  • Memory device 326 may also be, or include, a detachable or removable memory, including, but not limited to, a suitable cartridge, disk, CD ROM, DVD or USB memory.
  • Breaker assembly 316 includes a first conductive path 328 and a second conductive path 330 between input portion 318 and output portion 320.
  • Second conductive path 330 extends in parallel with first conductive path 328.
  • First conductive path 328 is configured to carry the DC current flowing through breaker assembly 316 under normal, i.e., non-fault, conditions.
  • second conductive path 330 carries a relatively small portion of the DC current flowing through breaker assembly 316 under normal conditions.
  • First conductive path 328 includes a switch 332 and a variable impedance device 334.
  • Switch 332 is a mechanical switch. In other embodiments, switch 332 is one or more semiconductor switches, or any other suitable switch or switches capable of carrying the DC current with relatively low losses when closed. In other embodiments, switch 332 is a vacuum or gas tube switch, such as gas tube switch 100. In the exemplary embodiment, switch 332 is more efficient (i.e., less lossy) when closed and conducting than gas tube switch 100.
  • Variable impedance device 334 may be any suitable device for providing variable impedance on first conductive path 328, such as a saturable reactor, a fault current limiter, a semiconductor device, etc.
  • Second conductive path 330 includes gas tube switch 100 coupled between input portion 318 and output portion 320.
  • first conductive path 328 has a low impedance (e.g., an impedance of about zero ohms) and second conductive path 330 has a very high impedance (e.g., an impedance about equal to an open circuit).
  • DC current entering input portion 318 will travel through the low impedance first conductive path 328 to output portion 320.
  • no current travels through second conductive path 330.
  • a relatively small amount of the DC current travels from input portion 318 to output portion 320 through second conductive path 330 under normal conditions.
  • controller 315 Upon detecting a fault condition, receiving an instruction to trip, or otherwise determining to trip, controller 315 diverts a portion of the DC current flowing between input portion 318 and output portion 320 from first conductive path 328 to second conductive path 330. More specifically, controller 315 increases the impedance of variable impedance device 334 and, at substantially the same time, closes the normally open gas tube switch 100. The impedance of first conductive path 328 is thus increased while the impedance of second conductive path 330 is greatly decreased. A portion of the DC current flowing from input portion 318 to output portion 320 now flows through second conductive path 330.
  • the portion of current diverted to second conductive path 330 is greater than or equal to an amount which will reduce the DC current in first conductive path 328 low enough to permit switch 332 to be opened without damage.
  • substantially all of the DC current is diverted to second conductive path 330.
  • less than substantially all of the DC current is diverted to second conductive path 330.
  • the amount of the DC current diverted to second conductive path 330 depends on the amount of time elapsed and the relative impedances of first conductive path 328 and second conductive path 330.
  • first conductive path 328 and second conductive path 330 each include one or more sensors (not shown) configured to detect the current in their respective first or second conductive paths 328 or 330 and provide the a signal representative of the detected current to controller 315.
  • controller 315 After controller 315 opens switch 332, the DC current flowing through first conductive path 328 will cease and all DC current flowing from input portion 318 to output portion 320 flows through second conductive path 330. Controller 315 next opens gas tube switch 100, thereby completing the interruption of DC current flowing between input portion 318 and output portion 320.
  • the determination by controller 315 of when to open gas tube switch 100 may be based on an elapsed time after opening switch 332, a measurement of the DC current through first conductive path 328, and/or any other suitable method for determining when to open gas tube switch 100.
  • variable impedance device 334 is reset to its lowest impedance state in anticipation of the closing of switch 332, when it is determined to resume normal operation.
  • FIG. 4 is a flow diagram of an exemplary method 436 for use in interrupting direct current between an input portion, such as input portion 218 or 318, and an output portion, such as output portion 220 or 320, of a breaker assembly, such as breaker assembly 216 or 316.
  • the method includes detecting 438 a fault condition and interrupting 440 a DC current between the input portion and the output portion of the breaker assembly in response to the detected fault condition by selective operation of a gas tube switch coupled between the input portion and the output portion and including a control grid.
  • the above-described DC circuit breakers provide an efficient method for providing circuit protection in DC power distribution systems.
  • the gas tube switch(es) used in the example embodiments are high voltage and high power capable gas tube switches.
  • the gas tube switches are capable of opening very quickly and can standoff hundreds of kilovolts.
  • the tubes can be combined in series and/or parallel to increase the voltage and/or current carrying capacity of the DC circuit breakers.
  • An exemplary technical effect of the methods, systems, and apparatus described herein includes at least one of: (a) detecting a fault condition; and (b) interrupting a DC current between an input portion and an output portion of a breaker assembly in response to a detected fault condition.
  • DC circuit breakers, breaker assemblies, and methods for interrupting direct current are described above in detail.
  • the DC circuit breakers, breaker assemblies, and methods for interrupting direct current are not limited to the specific embodiments described herein, but rather, components of systems and/or steps of the methods may be utilized independently and separately from other components and/or steps described herein.
  • the methods may also be used in combination with other systems and are not limited to practice with only the DC circuit breakers, breaker assemblies, and methods as described herein.
  • any feature of a drawing may be referenced and/or claimed in combination with any feature of any other drawing.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

L'invention porte sur des procédés et des systèmes de disjoncteur de courant continu (CC). Selon un exemple, un disjoncteur CC comprend un ensemble disjoncteur (316) configuré pour interrompre un courant CC, et un dispositif de commande (315). L'ensemble disjoncteur (316) comprend une partie d'entrée (318), une partie de sortie (320), et un commutateur à tube de gaz (100) couplé entre la partie d'entrée (318) et la partie de sortie (320). Le commutateur à tube de gaz (100) comprend une anode, une cathode, et une grille de commande. Le dispositif de commande (315) est configuré pour commander sélectivement l'ensemble disjoncteur (316) afin d'interrompre le courant CC entre la partie d'entrée (318) et la partie de sortie (320).
PCT/US2013/032131 2013-03-15 2013-03-15 Procédés et systèmes de disjoncteur de courant continu WO2014142974A1 (fr)

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PCT/US2013/032131 WO2014142974A1 (fr) 2013-03-15 2013-03-15 Procédés et systèmes de disjoncteur de courant continu

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Application Number Priority Date Filing Date Title
PCT/US2013/032131 WO2014142974A1 (fr) 2013-03-15 2013-03-15 Procédés et systèmes de disjoncteur de courant continu

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9520801B1 (en) 2015-08-12 2016-12-13 General Electric Company Method and system for a gas tube switch-based voltage source high voltage direct current transmission system
US9748857B2 (en) 2015-08-12 2017-08-29 General Electric Company Method and system for a gas tube-based current source high voltage direct current transmission system
EP3336869A1 (fr) * 2016-12-15 2018-06-20 General Electric Technology GmbH Appareil de commutation
US10256067B1 (en) 2018-01-02 2019-04-09 General Electric Company Low voltage drop, cross-field, gas switch and method of operation
EP3522194A1 (fr) * 2018-01-31 2019-08-07 General Electric Technology GmbH Appareil de commutation
EP3522196A1 (fr) * 2018-01-31 2019-08-07 General Electric Technology GmbH Appareil de commutation
US10403466B1 (en) 2018-03-23 2019-09-03 General Electric Company Low sputtering, cross-field, gas switch and method of operation
US10665402B2 (en) 2018-02-08 2020-05-26 General Electric Company High voltage, cross-field, gas switch and method of operation
WO2020190290A1 (fr) * 2019-03-20 2020-09-24 General Electric Company Systèmes et procédés pour disjoncteur à courant continu à commutation rapide
WO2021142283A1 (fr) * 2020-01-10 2021-07-15 General Electric Company Disjoncteur à courant continu à tube à décharge gazeuse
WO2021142265A1 (fr) * 2020-01-10 2021-07-15 General Electric Company Tube à décharge gazeuse bidirectionnel
CN114518533A (zh) * 2022-04-21 2022-05-20 山东科技大学 基于电磁场同步测量的混合直流断路器闭锁时刻测量方法

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DE1565993A1 (de) * 1965-05-26 1970-03-26 Asea Ab Gleichstromschalter
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Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9748857B2 (en) 2015-08-12 2017-08-29 General Electric Company Method and system for a gas tube-based current source high voltage direct current transmission system
US9520801B1 (en) 2015-08-12 2016-12-13 General Electric Company Method and system for a gas tube switch-based voltage source high voltage direct current transmission system
US11146043B2 (en) 2016-12-15 2021-10-12 General Electric Technology Gmbh Switching apparatus
EP3336869A1 (fr) * 2016-12-15 2018-06-20 General Electric Technology GmbH Appareil de commutation
WO2018108769A1 (fr) * 2016-12-15 2018-06-21 General Electric Technology Gmbh Appareil de commutation
CN110062949A (zh) * 2016-12-15 2019-07-26 通用电器技术有限公司 开关设备
US10256067B1 (en) 2018-01-02 2019-04-09 General Electric Company Low voltage drop, cross-field, gas switch and method of operation
EP3522194A1 (fr) * 2018-01-31 2019-08-07 General Electric Technology GmbH Appareil de commutation
CN111937110B (zh) * 2018-01-31 2023-03-10 通用电器技术有限公司 开关设备
WO2019149814A1 (fr) * 2018-01-31 2019-08-08 General Electric Technology Gmbh Appareil de commutation
CN111630620A (zh) * 2018-01-31 2020-09-04 通用电器技术有限公司 开关设备
CN111937110A (zh) * 2018-01-31 2020-11-13 通用电器技术有限公司 开关设备
CN111630620B (zh) * 2018-01-31 2023-08-04 通用电器技术有限公司 开关设备
WO2019149808A1 (fr) * 2018-01-31 2019-08-08 General Electric Technology Gmbh Appareil de commutation
US11088689B2 (en) 2018-01-31 2021-08-10 General Electric Company Switching apparatus
EP3522196A1 (fr) * 2018-01-31 2019-08-07 General Electric Technology GmbH Appareil de commutation
US11177099B2 (en) 2018-01-31 2021-11-16 General Electric Technology Gmbh Switching apparatus
US10665402B2 (en) 2018-02-08 2020-05-26 General Electric Company High voltage, cross-field, gas switch and method of operation
US10403466B1 (en) 2018-03-23 2019-09-03 General Electric Company Low sputtering, cross-field, gas switch and method of operation
WO2020190290A1 (fr) * 2019-03-20 2020-09-24 General Electric Company Systèmes et procédés pour disjoncteur à courant continu à commutation rapide
WO2021142265A1 (fr) * 2020-01-10 2021-07-15 General Electric Company Tube à décharge gazeuse bidirectionnel
US11482394B2 (en) 2020-01-10 2022-10-25 General Electric Technology Gmbh Bidirectional gas discharge tube
US11251598B2 (en) 2020-01-10 2022-02-15 General Electric Technology Gmbh Gas discharge tube DC circuit breaker
WO2021142283A1 (fr) * 2020-01-10 2021-07-15 General Electric Company Disjoncteur à courant continu à tube à décharge gazeuse
CN114518533A (zh) * 2022-04-21 2022-05-20 山东科技大学 基于电磁场同步测量的混合直流断路器闭锁时刻测量方法
CN114518533B (zh) * 2022-04-21 2022-07-01 山东科技大学 基于电磁场同步测量的混合直流断路器闭锁时刻测量方法

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