CN203813428U - Detonation device of 110kV voltage-class short circuit current limiter - Google Patents
Detonation device of 110kV voltage-class short circuit current limiter Download PDFInfo
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- CN203813428U CN203813428U CN201420204034.8U CN201420204034U CN203813428U CN 203813428 U CN203813428 U CN 203813428U CN 201420204034 U CN201420204034 U CN 201420204034U CN 203813428 U CN203813428 U CN 203813428U
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- 238000005474 detonation Methods 0.000 title abstract 6
- 239000003990 capacitor Substances 0.000 claims abstract description 27
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 17
- 239000010703 silicon Substances 0.000 claims abstract description 17
- 239000013307 optical fiber Substances 0.000 claims abstract description 14
- 230000003287 optical effect Effects 0.000 claims abstract description 6
- 230000037452 priming Effects 0.000 claims description 18
- 230000008054 signal transmission Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 12
- 238000004146 energy storage Methods 0.000 abstract description 10
- 230000005611 electricity Effects 0.000 abstract 1
- 239000002360 explosive Substances 0.000 abstract 1
- 238000004880 explosion Methods 0.000 description 17
- 238000005516 engineering process Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 238000002955 isolation Methods 0.000 description 8
- 230000001052 transient effect Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000005288 electromagnetic effect Effects 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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Abstract
The utility model provides a detonation device of a 110kV voltage-class short circuit current limiter. The detonation device comprises a first photoelectric converter, a second photoelectric converter, a silicon controlled rectifier, an energy storage capacitor and a short circuit current limiter. The short circuit current limiter is formed by multiple high-voltage current-carrying bridges which are connected in series. The first photoelectric converter is connected with the second photoelectric converter through an optical fiber. The second photoelectric converter is connected with the silicon controlled rectifier. The silicon controlled rectifier, the energy storage capacitor and the short circuit current limiter are connected in series to form a closed loop. The first photoelectric converter converts a received open circuit control signal into an optical signal and transmits the optical signal to the second photoelectric converter through the optical fiber. The second photoelectric converter converts the optical signal into an electrical signal. The silicon controlled rectifier receives the electrical signal and triggers the conduction of the closed loop. The energy storage capacitor discharges electricity to detonate an explosive part of the high-voltage current-carrying bridge so as to cut off the short circuit current. According to the detonation device of the 110kV voltage-class short circuit current limiter, the high-voltage region and the low-voltage region are isolated, a problem of electromagnetic influence is prevented, and a detonation method that is easy to use with a small-sized detonation device is proposed.
Description
Technical field
The utility model relates to power technology, is a kind of priming device of fault current limiter of 110 kilovoltage grades concretely.
Background technology
At present, along with developing rapidly of national economy, electric power system capacity and scale constantly expand, and distributed power generation resource accesses in a large number, make grid short circuit electric current increasing, and the problem being caused by it highlights gradually.On the one hand, the increase of grid short circuit electric current, causing electric equipment (as circuit breaker and isolating switch) in electrical network to cut-off capacity does not mate with the capacity of short circuit of system gradually, the rupturing capacity of circuit breaker and other equipment and short circuit dynamic stability can not meet system requirements, there is but will be replaced by the circuit breaker that cut-offs more greatly capacity, manufacture difficulty is large, and cost is very high, is not a kind of economically viable, blanket method.On the other hand, the opening time of general circuit breaker is 20～150ms, the standard-sized sheet break time at least needs a few tens of milliseconds, and the peak-peak of fault current often appears at the first half-wave, peak value of short to sending out, the impact of electric power that converting equipment causes and thermal effect is very large, anti-short circuit capability to the equipment such as generator, transformer is had higher requirement, and in accounting system, the maximum of existing some transformers tolerance short circuit current design load can not meet the demands.Therefore, restriction system short circuit current has become a major issue urgently to be resolved hurrily.
Fault current limiter (fault current limiter) is a kind of device of quick fault current limiting, operate time is in 5ms, just form product (the Is-quick current-limiting device of ABB AB) abroad as far back as the fifties, start a large amount of occur in document at home and abroad the seventies, but really coming into one's own with fast development is after flexible AC transmission technology proposes, the fault current limiter from the development of past ten years with higher maturity and practicality is the mixing type current-limiting device that adopts explosion switch and current limiting fuse to compose in parallel, and only obtain application comparatively widely in 10kV system at present.
110kV is a main electric pressure of China's electrical network, and along with the sharply increase of electric load, 110kV short circuit current is also increasing, under short-circuit current rush and that the accident that deformation of transformer winding damages occurs is of common occurrence.Conventional current-limiting method is to adopt series connection current limiting reactor at present, although this technology can play certain limiting short-circuit current effect, but cannot fundamentally solve the harm of short circuit current, also can bring the unfavorable factors such as direct active loss, the decline of band burden with power ability, bus pressure drop, stray field simultaneously.Because 110kV voltage gradation is high, compared with the current limiting technique of 10kV system, all need to redesign especially detonating technique aspect at the aspect such as technology and technique.In addition, it is very large that the electric current of 110kV electric pressure cut-offs spacing, with current high pressure current-carrying pontic technology, adopts single high pressure current-carrying pontic to realize difficulty very big, and safety and reliability are all difficult to ensure.
Utility model content
Cannot meet the conditional request of 110kV grade explosion type fault current limiter for solving existing relevant detonating technique, a kind of applicable, reliable 110kV explosion type fault current limiter is provided.
The utility model provides a kind of priming device of fault current limiter of 110 kilovoltage grades, device comprises: the first optical-electrical converter, the second photovoltaic converter, controllable silicon, storage capacitor and fault current limiter, fault current limiter is in series by multiple high pressure current-carrying pontics, described the first optical-electrical converter is connected with described the second optical-electrical converter by optical fiber, the second described optical-electrical converter is connected with controllable silicon, and described controllable silicon, storage capacitor and fault current limiter are connected into a closed-loop path;
The control signal that opens circuit receiving is converted to light signal by the first described optical-electrical converter, and by optical fiber by described optical signal transmission to described the second optical-electrical converter, described light signal is converted to the signal of telecommunication by the second optical-electrical converter, described controllable silicon receives closed-loop path described in signal of telecommunication triggering and conducting, and storage capacitor discharges electric weight ignites firer's parts interrupting short circuit of described high pressure current-carrying pontic.
Preferably, the priming device in the utility model embodiment also comprises:
Photovoltaic charger, is connected with described storage capacitor, for being that electric energy is that described storage capacitor charges by transform light energy.
Preferably, the priming device in the utility model embodiment also comprises:
High-voltage and current-limitation fuse and voltage limiter, in parallel with described high pressure current-carrying pontic respectively.
Preferably, the priming device in the utility model embodiment also comprises:
Current limiting reactor, in parallel with described high-voltage and current-limitation fuse, for maintain current conductive state after described high-voltage and current-limitation fuse fusing.
The utility model has solved a key technology difficult problem in the time of research and design 110kV electric pressure fault current limiter at present, cleverly by high-low pressure zone isolation, avoid electromagnetic effect problem, proposed a kind of volume little, realize little, the practicable method of ignition of difficulty, useful technological means is provided can to application and the popularization of 110kV explosion type fault current limiter.
For above and other object of the present utility model, feature and advantage can be become apparent, preferred embodiment cited below particularly, and coordinate appended graphicly, be described in detail below.
Brief description of the drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the schematic diagram of the priming device of the fault current limiter of a kind of 110 kilovoltage grades of the utility model;
Fig. 2 is the schematic diagram of the priming device of the fault current limiter of a kind of 110 kilovoltage grades of the utility model;
Fig. 3 is the schematic diagram of the utility model one embodiment;
Fig. 4 is the schematic diagram of the utility model one embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1, the utility model provides a kind of priming device of fault current limiter of 110 kilovoltage grades, device comprises: the first optical-electrical converter 101, the second photovoltaic converter 102, controllable silicon 103, storage capacitor 104 and fault current limiter 105, the first optical-electrical converter 101 is connected with the second optical-electrical converter 102 by optical fiber, the second optical-electrical converter 102 is connected with controllable silicon 103, and controllable silicon 103, storage capacitor 104 and fault current limiter 105 are connected into a closed-loop path;
The control signal that opens circuit receiving is converted to light signal by the first optical-electrical converter 101, and by optical fiber by described optical signal transmission to the second optical-electrical converter 102, light signal is converted to the signal of telecommunication by the second optical-electrical converter 102, controllable silicon 103 receives closed-loop path described in signal of telecommunication triggering and conducting, and storage capacitor discharges electric weight ignites firer's parts interrupting short circuit of the high pressure current-carrying bridge in fault current limiter.
Meanwhile, as shown in Figure 2, priming device also comprises:
Photovoltaic charger 106, is connected with storage capacitor 104, for being that electric energy is that storage capacitor 104 charges by transform light energy.
Below in conjunction with concrete execution mode, the technical solution of the utility model is described in further detail:
Figure 3 shows that the schematic diagram of the utility model one embodiment, comprise high pressure current-carrying pontic 401, high-voltage and current-limitation fuse 402, voltage limiter 403, transient current transformer 404, control unit 405, photoelectric sensor 406, optical fiber 407, photovoltaic charger 408, energy storage capacitor 409, controllable silicon unit 410.Carry out mutually the explanation of utility model content below as example taking one in electrical network three-phase, the utility model content of other phases is mutually identical therewith.
After high pressure current-carrying pontic 401, high-voltage and current-limitation fuse 402 and voltage limiter 403, seal in the position that needs quick-speed turning on-off in 110kV lead-in wire (wire).
High pressure current-carrying pontic 401 is a kind of explosion type switching devices that are made by the metal material of high conductivity (T2 copper), inside is provided with firer's parts, have that ampacity is large, the feature of blast quick action, but large electric current breaking capacity is very poor, therefore its effect is normal condition download stream, fast transfer short circuit current under short-circuit conditions.Cut-off required distance in order to reach 110kV, adopt the form of multiple high pressure current-carrying pontic series connection.Each pontic is provided with firer's parts, but owing to there are differences unavoidably in technique, operating characteristics also can exist certain difference, therefore adopts the ignition signal that is connected into closed-loop path to ignite series connection firer parts.Explosion switch in 110kV explosion type fault current limiter is to be made by pure copper material, be provided with in the middle electronics firer parts, when normal, resistance is minimum, have very strong current capacity, while work at ordinary times, electric current all passes through from this explosion switch, in the time that system is short-circuited fault, explosion switch disconnects immediately, resistance increases rapidly, and short circuit current is transformed in jumbo current limiting fuse fast, by current limiting fuse, short circuit current is carried out to disjunction.
High-voltage and current-limitation fuse 402 has very strong current breaking capacity and good I/s characteristic, under short circuit current effect, its melt can melt very soon, vaporizes, produces electric arc, sets up arc voltage, extinguish arcs, finally realize cut-offfing of electric current, but high-voltage and current-limitation fuse rated current is less, current capacity is limited, and therefore its effect is to stay out of under normal circumstances, under short-circuit conditions, cut-offs short circuit current.
The effect of voltage limiter 403 is to absorb high-voltage and current-limitation fuse to cut-off the arc energy of generation and the energy that power supply injects, and makes its smooth blow-out, and the overvoltage Limiting during by disconnection is in allowed band.
Current limiting reactor 411 adopts mode in parallel to access, for maintain current conductive state after high-voltage and current-limitation fuse fusing, blow-out, play the effect of limiting short-circuit current simultaneously, current limiting reactor also can be selected not connect, and after fault current limiter action, 110kV lead-in wire 412 (wire) disconnects.
Transient current transformer 404 is for isolating 110kV high pressure, detect short circuit current signal access control unit, transient current transformer also can be substituted and be used by conventional current instrument transformer, and pulse signal decay and phase shift that conventional current instrument transformer exists can be calculated compensation by control unit.Control unit is for collection, calculating, judgement, driving and the communication of short circuit current signal.Photoelectric sensor and optical fiber transfer to controllable silicon unit for the control signal that control unit is sent, and the anti-jamming effectiveness of Optical Fiber Transmission is good, have avoided complicated high pressure isolation.
In the embodiment of the present invention, ignition signal is sent by control system, control system is microelectronic device, and explosion switch is to be applied on the major loop of electric power system, therefore ignition signal must carry out high pressure isolation, avoid high-voltage electromagnetic to disturb control system is impacted, cause misoperation or tripping.In 10kV system, because voltage is lower, relatively easily realize, be generally to adopt special transient state pulse transformer to isolate.And 110kV voltage is too high, adopt transformer isolation very unactual, not only volume is large, cost is high, key is that signal attenuation is serious, and electromagnetic compatibility is extremely difficult, and especially ignition signal is a pulse, transmit a pulse signal with 110kV isolating transformer, not only signal intensity attenuation is serious, and the waveform steepness of pulse signal will be weakened greatly, can not meet the igniting requirement of firer's parts.And the present invention adopts firer's parts that photovoltaic charger and storage capacitor are explosion type fault current limiter that initiation energy is provided in 110kV equipotential region, realize the isolation between high-low pressure by Optical Fiber Transmission control signal, got rid of the interference of electromagnetic field to control signal completely.
Photovoltaic charger 408, for sunlight is converted to direct current, charges to energy storage capacitor 409, stops charging while being charged to setting voltage.This energy storage capacitor 409 is connected into a closed-loop path by controllable silicon unit 410 and the priming device of all high pressure current-carrying pontic firer parts.This part, all in 110kV voltage equipotential region, has therefore been simplified the consideration to insulation, without carrying out high pressure isolation.
Workflow of the present utility model is:
In the time of normal operation, the carrying of high pressure current-carrying pontic is whole operating currents almost, and high-voltage and current-limitation fuse and voltage limiter are not worked; Sunlight is converted to direct current by photovoltaic charger, and energy storage capacitor is charged, and stops charging while being charged to setting voltage.
When the fault that is short-circuited in 110kV system, short circuit current is detected by transient current transformer, after transferring to control unit and identifying, send control signal, be converted to light signal by optical-electrical converter, through Optical Fiber Transmission to high-pressure area, be converted to the signal of telecommunication through optical-electrical converter again, trigger controllable silicon cell conduction, energy storage capacitor discharges rapidly electric weight, ignites high pressure current-carrying pontic firer parts simultaneously, pontic cut-offs immediately, its resistance rises rapidly, and short circuit current is transferred in high-voltage and current-limitation fuse, and under voltage limiter acting in conjunction, electric current is cut-off.
If do not adopt current limiting reactor, short circuit current is disconnected; If employing current limiting reactor, short circuit current is transferred to current limiting reactor, and short circuit current level reduces greatly.
Key problem in technology of the present utility model is: adopt firer's parts that photovoltaic charger and storage capacitor are explosion type fault current limiter that initiation energy is provided in 110kV equipotential region, realize the isolation between high-low pressure by Optical Fiber Transmission control signal, got rid of the interference of electromagnetic field to control signal completely.
As shown in Figure 4, taking a capacity 180MVA in a 220kV transformer station, connect group YNyn0d11 220kV transformer as embodiment (only taking one in electrical network three-phase mutually as example, other are mutually identical therewith mutually).The outlet of transformer medium voltage side is through extremely middle pressure bus of isolating switch, current limiting reactor 501, circuit breaker, isolating switch; explosion type fault current limiter 503 access in parallel with current limiting reactor 501; when normal operation; the running current explosion type fault current limiter of almost all flowing through; in the time breaking down, explosion type fault current limiter disconnects, the short circuit current current limiting reactor 501 of flowing through; play limiting short-circuit current, the effect of protection transformer medium voltage side winding.
In this embodiment:
(1) 110kV explosion type fault current limiter adopts the high pressure current-carrying pontic series connection of 8 10kV, the clear distance cut-offfing after each pontic action is more than 120mm, more than clear distance after 8 series connection pontics cut-off will reach 960mm, this cut-offs apart from meeting 110kV system and cut-offs requirement.
(2) firer's parts that conventional products adopts are at present low-tension ignition technology.Electric detonator adopts exploding bridge wire, and with ignition charge, susceptibility is very high, and higher to manufacture craft and shielding measure requirement etc., fail safe is relatively poor, is difficult for keeping, and the danger that maintenance is measured is at ordinary times large, and the life-span is shorter, generally can more than ten year.Therefore, it is high pressure plasma spark that firer's parts of high pressure current-carrying pontic inside need adopt the detonator of passivation, the sparking mode of detonator, is directly produced by the capacitor that charges to 800V.
(3) due to 10kV high-voltage and current-limitation fuse comparatively generally at present, therefore 110kV high-voltage and current-limitation fuse needs specific customization, and parameter meets rated voltage 110kV, specified drop-out current 6kA.Voltage limiter can be selected and will cut-off overvoltage Limiting at 2.5 times of zinc oxide valve plates below horizontal of specified phase voltage.
(4) transient current transformer can save, directly from the secondary terminals number of winning the confidence of 110kV side current transformer 502 in transformer station, and the acquisition port of access control unit.Control unit can adopt the mode of logical circuit and microcomputer detecting control system use, adopts the quick computing module of DSP in signaling interface, and CPU adopts the pic chip of Wei Xin company of the U.S., realizes good interference free performance.Wherein logical circuit and microsystem can work alone, when normal operation, microsystem is also carried out analysis management to logic short circuit, to prevent erroneous judgement, ensure high reliability and stability, configuration energy-storage travelling wave tube in checkout gear, the charged initial stage charges, even if short-time loss of power supply appears in device, can ensure the normal work of device in 2s.
(5) photovoltaic charger is generally made up of solar photovoltaic cell panel and voltage and current detection circuit, charging circuit, overcharge protection circuit, power 80～100W, output 800V voltage.Adopt rated voltage 800V, the electrolytic capacitor of capacity 1nF carries out energy storage, and controllable silicon unit adopts high-pressure thyristor, also can adopt light-operated high-pressure thyristor, does not connect optical-electrical converter in the fibre-optic terminus of high-pressure area, directly accesses light-operated high-pressure thyristor.
Along with grid short circuit levels of current is increasing, in power industry, safe and reliable, energy-conservation effective 110kV electric pressure short-circuit current limitation method and apparatus is proposed to increasing demand at present, and mechanism and the enterprise of the exploration that conducts a research in this respect are at present still less, also rarely has relevant technological achievement.Proposition of the present utility model, solve a key technology difficult problem in the time of research and design 110kV electric pressure fault current limiter at present, by high-low pressure zone isolation, avoided electromagnetic effect problem cleverly, proposed a kind of volume little, realize little, the practicable method of ignition of difficulty.Therefore the utility model provides useful technological means can to application and the popularization of 110kV explosion type fault current limiter.
In the utility model, applied specific embodiment principle of the present utility model and execution mode are set forth, the explanation of above embodiment is just for helping to understand method of the present utility model and core concept thereof; , for one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model meanwhile.
Claims (4)
1. the priming device of the fault current limiter of a kilovoltage grade, it is characterized in that, described device comprises: the first optical-electrical converter, the second photovoltaic converter, controllable silicon, storage capacitor and fault current limiter, described fault current limiter is in series by multiple high pressure current-carrying pontics, described the first optical-electrical converter is connected with described the second optical-electrical converter by optical fiber, the second described optical-electrical converter is connected with controllable silicon, and described controllable silicon, storage capacitor and fault current limiter are connected into a closed-loop path;
The control signal that opens circuit receiving is converted to light signal by the first described optical-electrical converter, and by optical fiber by described optical signal transmission to described the second optical-electrical converter, described light signal is converted to the signal of telecommunication by the second optical-electrical converter, described controllable silicon receives closed-loop path described in signal of telecommunication triggering and conducting, and storage capacitor discharges electric weight ignites firer's parts interrupting short circuit of described high pressure current-carrying pontic.
2. the priming device of the fault current limiter of 110 kilovoltage grades as claimed in claim 1, is characterized in that, described priming device also comprises:
Photovoltaic charger, is connected with described storage capacitor, for being that electric energy is that described storage capacitor charges by transform light energy.
3. the priming device of the fault current limiter of 110 kilovoltage grades as claimed in claim 1, is characterized in that, described priming device also comprises:
High-voltage and current-limitation fuse and voltage limiter, in parallel with described fault current limiter respectively.
4. the priming device of the fault current limiter of 110 kilovoltage grades as claimed in claim 3, is characterized in that, described priming device also comprises:
Current limiting reactor, in parallel with described high-voltage and current-limitation fuse, for maintain current conductive state after described high-voltage and current-limitation fuse fusing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420204034.8U CN203813428U (en) | 2014-04-24 | 2014-04-24 | Detonation device of 110kV voltage-class short circuit current limiter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420204034.8U CN203813428U (en) | 2014-04-24 | 2014-04-24 | Detonation device of 110kV voltage-class short circuit current limiter |
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| Publication Number | Publication Date |
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| CN203813428U true CN203813428U (en) | 2014-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420204034.8U Expired - Lifetime CN203813428U (en) | 2014-04-24 | 2014-04-24 | Detonation device of 110kV voltage-class short circuit current limiter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024368A (en) * | 2014-04-24 | 2015-11-04 | 国家电网公司 | 110kV voltage class short-circuit current-limiting device detonation device and system |
| CN106026139A (en) * | 2016-07-04 | 2016-10-12 | 广西电网有限责任公司贺州供电局 | Method for preventing power system from oscillation |
| CN111697532A (en) * | 2020-05-22 | 2020-09-22 | 华为技术有限公司 | Disconnection method and disconnection system of fuse |
-
2014
- 2014-04-24 CN CN201420204034.8U patent/CN203813428U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024368A (en) * | 2014-04-24 | 2015-11-04 | 国家电网公司 | 110kV voltage class short-circuit current-limiting device detonation device and system |
| CN106026139A (en) * | 2016-07-04 | 2016-10-12 | 广西电网有限责任公司贺州供电局 | Method for preventing power system from oscillation |
| CN111697532A (en) * | 2020-05-22 | 2020-09-22 | 华为技术有限公司 | Disconnection method and disconnection system of fuse |
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