CN101604835B - Fault current limiter based on fast switch and triggered vacuum switch - Google Patents

Fault current limiter based on fast switch and triggered vacuum switch Download PDF

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Publication number
CN101604835B
CN101604835B CN2009100436062A CN200910043606A CN101604835B CN 101604835 B CN101604835 B CN 101604835B CN 2009100436062 A CN2009100436062 A CN 2009100436062A CN 200910043606 A CN200910043606 A CN 200910043606A CN 101604835 B CN101604835 B CN 101604835B
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China
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current
switch
triggered vacuum
short circuit
vacuum switch
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CN101604835A (en
Inventor
陆佳政
方针
张红先
蒋正龙
赵纯
李波
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State Grid Corp of China SGCC
State Grid Hunan Electric Power Co Ltd
Disaster Prevention and Mitigation Center of State Grid Hunan Electric Power Co Ltd
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Hu'nan Huicui Electric Power Technology Co Ltd
HUNAN INSTITUTE OF POWER Co EXPERIMENT
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Abstract

A fault current limiter based on a fast switch and a triggered vacuum switch is disclosed, which comprises a fast switch (1) and a current limiting resistor (2) which are connected in parallel, wherein, a first pulse capacitor (3), a first inductor (4) and a first triggered vacuum switch (5) are connected in series between two ends of the fast switch (1); a second pulse capacitor (6), a second inductor (7) and a second triggered vacuum switch (8) are connected in series between two ends of the current limiting resistor (2). The invention: 1) enables short circuit current to be incapable of reaching a first current peak value in a state of infinite current; 2) causes arc current of the fast switch to achieve fast zero crossing and then arc blowout; 3) can pass through large pulse current at high triggering speed and can achieve arc blowout at the time of the zero crossing of the pulse current; 4) can rapidly inhibit the short circuit current; 5) and automatically limits current subsequent to the short circuit of a system to ensure quality of power supply and save establishment expenditure of network.

Description

A kind of fault current limiter based on high-speed switch and Triggered Vacuum Switch
Technical field
The invention belongs to the electrical engineering technical field, relate in particular to a kind of fault current limiter based on high-speed switch and Triggered Vacuum Switch, this flow restricter is applicable to the current limliting processing fast automatically when electric power system is short-circuited fault.
Background technology
In recent years, the short circuit current failure rate of China's electric power system sharply rises along with the expansion of the growth of power supply capacity and scale of power, and generator and main transformer are when the near region short circuit takes place, and short circuit current can meet or exceed 80～100kA level.And existing circuit breaker exposes following problem in the face of big short circuit current like this through practice test:
(1), rated short circuit drop-out current is less than 63kA, connecting-disconnecting function can not meet the demands;
(2), do not possess current-limiting function, the standard-sized sheet break time reaches 60～200ms.Before cut-offfing, generator and transformer Chang Yin cannot stand the electric power of first cycle of short circuit current and impact promptly by its damage.
The major measure of limiting short-circuit current adopts current limiting reactor in addition at present, employing high-impedance transformer or change operational mode, but all these measures all exist or increase energy consumption or reduce the quality of power supply or defectives such as reduction power supply capacity and power supply reliability difference.
Summary of the invention
The technical problem to be solved in the present invention is, defective at known current limiting technique existence, design a kind of fault current limiter based on high-speed switch and Triggered Vacuum Switch, use this flow restricter can realize short-circuit fault of power system automatic current limiting processing, the quality of power supply when making it to guarantee the quality of power supply with normal power supply is identical, short circuit current is reduced at utmost the infringement of electric equipment in the time of guaranteeing the short trouble generation again, thereby the safe and stable operation that helps electric power system can also be saved for electrical network simultaneously and build spending.
Technical solution of the present invention is that described fault current limiter based on high-speed switch and Triggered Vacuum Switch as shown in Figure 1, includes high-speed switch 1 and current-limiting resistance 2 in parallel.Be serially connected with first pulsed capacitance 3, first inductor 4 and first Triggered Vacuum Switch 5 between the two ends of wherein said high-speed switch 1 successively; Be serially connected with second pulsed capacitance 6, second inductor 7 and second Triggered Vacuum Switch 8 between the two ends of described current-limiting resistance 2 successively.
Operation principle of the present invention is: this flow restricter is serially connected on the circuit of electric power system, and first pulsed capacitance 3 and second pulsed capacitance 6 are pressed the polarity of voltage pre-charge shown in Fig. 1.During normal power supply, high-speed switch 1 is in closure state, and the line current of electric power system flows through high-speed switch 1, and flow restricter produces energy consumption hardly.When electric power system was short-circuited fault, line current increased rapidly, and when electric current during greater than preset threshold, high-speed switch 1 cut-offs rapidly, but short circuit current still exists with the form of arc current; This moment is according to the actual direction of short circuit current in the high-speed switch 1, corresponding first Triggered Vacuum Switch 5 of triggering and conducting or second Triggered Vacuum Switch 8, pass through first inductor 4 or second inductor, 7 resonant discharge by first pulsed capacitance 3 or second pulsed capacitance 6, provide one with high-speed switch 1 in the pulse current of short circuit current opposite in direction, thereby realize the rapid zero passage of short circuit current in the high-speed switch 1 and blow-out, so the major part of short circuit current is also transferred to the branch road of corresponding first pulsed capacitance 3 or the branch road of second pulsed capacitance 6 by high-speed switch 1, fraction is transferred to current-limiting resistance 2; Flow through the short circuit current of first pulsed capacitance 3 or second pulsed capacitance 6, make the oppositely resonant charging rapidly of this pulsed capacitance, reach higher back-pressure.Accordingly, first Triggered Vacuum Switch 5 or second Triggered Vacuum Switch 8 also can the blow-outs owing to current over-zero, thereby short circuit current all is transferred in the current-limiting resistance 2, and current-limiting resistance 2 can promptly suppress the short circuit current on the circuit.Finish in several ms of whole current limliting process after fault takes place, the fault current of electric power system is got off by flow restrictors limit.
The invention has the beneficial effects as follows:
1), use high-speed switch, switch off time is not more than 2ms, makes short circuit current can not reach first current peak under the no current limliting situation;
2), use the pulsed capacitance discharge of pre-charge, reverse pulse current is provided, make the rapid zero passage of arc current of high-speed switch and blow-out;
3), use Triggered Vacuum Switch control impuls capacitance discharges, can guarantee that triggering speed is fast, can pass through big pulse current again, can also blow-out when the pulse current zero passage;
4), the sealing in of current-limiting resistance, can promptly suppress the short circuit current on the circuit;
5), the automatic current limiting of using this device can realize that electric power system is short-circuited after the fault is handled, the quality of power supply in the time of can guaranteeing normal power supply, can when short trouble takes place, reduce the infringement of short circuit current to a great extent again, thereby help the safe and stable operation of electric power system electric equipment.And less short circuit current can be selected the circuit breaker that uses rupturing capacity less, the spending of saving lectotype selection and power grid construction thus.
Description of drawings
Fig. 1 is the circuit diagram of a specific embodiment of the present invention, is denoted as among the figure:
The 1-high-speed switch,
The 2-current-limiting resistance,
3-first pulsed capacitance,
4-first inductor,
5-first Triggered Vacuum Switch,
6-second pulsed capacitance,
7-second inductor,
8-second Triggered Vacuum Switch.
Embodiment
Figure 1 shows that the specific embodiment of fault current limiter that the present invention is based on high-speed switch and Triggered Vacuum Switch.High-speed switch 1 among this embodiment, adopt KSKG-10 type 10kV, the 2000A electromagnetic repulsion force high-speed switch of the development of high-voltage engineering system of the Chinese Wuhan City Central China University of Science and Technology, the TD-12/2500-40 vacuum interrupter that this switch adopts the Kai Saier Electronics Co., Ltd. in Chengdu, Sichuan to produce, rated voltage 12kV, rated current 2500A, rated short circuit drop-out current 40kA, utilization passes to that the electromagnetic repulsion force between the eddy current is as actuating force in the sandwich wound coil of pulse current and the metal dish, and the full stroke time when cut-offfing operation can be controlled in 2ms.Current-limiting resistance 2 adopt Wuhan City to continue DZ-3000A/2 Ω type resistance that new extraordinary electric limited company produces, single-phase resistance 2 Ω, rated voltage 6kV, rated current 3kA, nominal operation time 1s allow temperature rise 300K.The MKMJ30-60 type pulse capacitor that first pulsed capacitance 3 and second pulsed capacitance 6 adopt Shangyu, Zhejiang China wound electrical technology Co., Ltd to produce, this capacitor is the metalized film self healing capacitor, rated voltage 30kV, rated capacitance 60 μ F.The wire-wound inductor device that first inductor 4 and second inductor 7 adopt the extraordinary electrical equipment of xianning,hubei sunlight company to produce, specified inductance value 10 μ H.The ZKTC100/50 type Triggered Vacuum Switch that first Triggered Vacuum Switch 5 and second Triggered Vacuum Switch 8 adopt Zhuhai, Guangdong space Photoelectron Corp. to produce, rated voltage 10kV can be by the pulse current of 70kA.Above-mentioned high-speed switch 1, current-limiting resistance 2, first pulsed capacitance 3, first inductance 4, first Triggered Vacuum Switch 5, second pulsed capacitance 6, second inductance 7, second Triggered Vacuum Switch 8 are that circuit shown in the accompanying drawing 1 connects according to above-mentioned technical solution, and it is in parallel with current-limiting resistance 2 to be about to high-speed switch 1.First pulsed capacitance 3, first inductor 4 and first Triggered Vacuum Switch 5 are serially connected with between the two ends of high-speed switch 1 successively; Second pulsed capacitance 6, second inductor 7 and second Triggered Vacuum Switch 8 are serially connected with between the two ends of current-limiting resistance 2 successively.
The fault current limiter based on high-speed switch and Triggered Vacuum Switch of the present invention of said structure, on probation to be proved to be current limitation effect good through manufacturing experimently, and working stability, safe and reliable reaches designing requirement fully.

Claims (1)

1. fault current limiter based on high-speed switch and Triggered Vacuum Switch, it is characterized in that, it includes high-speed switch (1) and current-limiting resistance (2) in parallel, is serially connected with first pulsed capacitance (3), first inductor (4) and first Triggered Vacuum Switch (5) between the two ends of wherein said high-speed switch (1) successively; Be serially connected with second pulsed capacitance (6), second inductor (7) and second Triggered Vacuum Switch (8) between the two ends of described current-limiting resistance (2) successively.
CN2009100436062A 2009-06-05 2009-06-05 Fault current limiter based on fast switch and triggered vacuum switch Active CN101604835B (en)

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Families Citing this family (10)

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Publication number Priority date Publication date Assignee Title
CN102353455B (en) * 2011-06-30 2013-04-17 河南省电力公司郑州供电公司 Electrical equipment overheating fault previewing apparatus
CN103117538B (en) * 2013-02-06 2015-04-08 中国科学院电工研究所 Resonance type current limiter based on insulator-metal phase change resistor
CN103325638B (en) * 2013-05-24 2016-05-04 西安交通大学 A kind of HVDC gas-break switch
CN104617567A (en) * 2015-01-13 2015-05-13 中国矿业大学 Novel short circuit current limiter
EP3059827A1 (en) * 2015-02-20 2016-08-24 ABB Technology Ltd Switching system for breaking a current and method of performing a current breaking operation
CN106207949A (en) * 2016-08-23 2016-12-07 温新正 A kind of method protecting charging current limiter resistance
CN109188251B (en) * 2018-10-16 2020-10-16 南京南瑞继保电气有限公司 Fault current limiter test circuit and control method
CN110416985B (en) * 2019-07-26 2020-11-10 湖南大学 Fault current leakage device with arc extinction protection function and control method thereof
CN110783151B (en) * 2019-10-31 2021-11-19 南京亚派科技股份有限公司 Simple instantaneous and rapid breaking structure of miniature circuit breaker
CN113285433B (en) * 2021-01-27 2022-01-04 安徽一天电气技术股份有限公司 Short circuit current peak-limiting current-limiting system

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Assignee: Hunan Focus Environmental Protection Technology Co.,Ltd.

Assignor: The Scientific Research Institute of Hunan Province|Hunan province electric power company huicui Power Technology Co. Ltd.

Contract record no.: 2011430000135

Denomination of invention: Fault current limiter based on fast switch and triggered vacuum switch

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Address after: 410007 No. 79 hydroelectric power street, east pond, Hunan, Changsha

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Correct: Research Institute of Hunan province electric power company| 410007 Hunan province Changsha Dong Tang hydropower Street No. 79|Hunan huicui Electric Power Technology Co. Ltd.|Power Grid Corp

False: Research Institute of Hunan province electric power company| 410007 Hunan province Changsha Dong Tang hydropower Street No. 79|Hunan huicui Electric Power Technology Co. Ltd.| Power Grid Corp

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