CN201877823U - Capacitor for direct-current circuit breaker - Google Patents

Capacitor for direct-current circuit breaker Download PDF

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Publication number
CN201877823U
CN201877823U CN2010206212754U CN201020621275U CN201877823U CN 201877823 U CN201877823 U CN 201877823U CN 2010206212754 U CN2010206212754 U CN 2010206212754U CN 201020621275 U CN201020621275 U CN 201020621275U CN 201877823 U CN201877823 U CN 201877823U
Authority
CN
China
Prior art keywords
circuit breaker
direct
capacitor
current
current circuit
Prior art date
Application number
CN2010206212754U
Other languages
Chinese (zh)
Inventor
王崇祜
熊黄海
张献伟
Original Assignee
上海思源电力电容器有限公司
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 上海思源电力电容器有限公司 filed Critical 上海思源电力电容器有限公司
Priority to CN2010206212754U priority Critical patent/CN201877823U/en
Application granted granted Critical
Publication of CN201877823U publication Critical patent/CN201877823U/en

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Abstract

A capacitor for a direct-current circuit breaker is applied to direct-current power transmission system, the capacitor and a reactor are connected in series to form a resonance branch having the capacitor connected with an inductor, and the resonance branch is connected in parallel with the direct-current circuit breaker. Compared with the prior art, the resonance branch is connected in parallel with the direct-current circuit breaker, the resonance branch can generate resonant current during on and off of the direct-current circuit breaker, and the resonant current flows through the direct-current circuit breaker, so that a zero crossing point is formed in synthetic current flowing through the circuit breaker, the direct-current circuit breaker can realize arc welding or disconnection, the problem that a body of the direct-current circuit breaker is unable to realize on and off of direct current is solved, and the loop on and off structure of the direct-current circuit breaker is simplified.

Description

The dc circuit breaker capacitor

Technical field

The utility model relates to a kind of capacitor, particularly a kind of dc circuit breaker capacitor.

Background technology

At present, the blow-out of AC circuit breaker utilizes alternating current self zero crossing to realize, adopts various arc blow-out cooling meanss to finish the blow-out of AC circuit breaker in arc gap.But in DC transmission system, transmission current is a direct current, does not have the process of alternation, and electric current zero crossing can not occur, only can't realize cut-offfing of direct current by dc circuit breaker itself.

The utility model content

The utility model purpose is to provide a kind of dc circuit breaker capacitor, to solve existing DC transmission system in the present technology, transmission current is a direct current, the process that does not have alternation, electric current zero crossing can not occur, only can't realize the technical matters of cut-offfing of direct current by dc circuit breaker itself.

A kind of dc circuit breaker capacitor is applied in the DC transmission system, constitutes the resonance branch road of electric capacity and inductance series connection after described capacitor is connected with a reactor, and this resonance branch road and dc circuit breaker are connected in parallel.

Preferably, a described resonance branch road and a protection branch road are connected in parallel.

Preferably, described protection branch road comprises a nonlinear resistance at least.

Compared with prior art, resonance branch road and dc circuit breaker that the utility model constituted are connected in parallel, this resonance branch road can produce resonance current in the interrupting process of dc circuit breaker, this resonance current dc circuit breaker of flowing through, make the resultant current of the circuit breaker of flowing through zero crossing occur, thereby make the dc circuit breaker can realize blow-out and disconnect, solved the problem of cut-offfing that dc circuit breaker itself can't be realized direct current, simplified the structure that dc circuit breaker cut-offs the loop.

Description of drawings

Fig. 1 is a circuit connection diagram of the present utility model.

Embodiment

Below in conjunction with accompanying drawing, describe the utility model in detail.

See also Fig. 1, a kind of dc circuit breaker capacitor, be applied in the DC transmission system, after connecting with a reactor, capacitor constitutes the resonance branch road 2 of electric capacity and inductance series connection, resonance branch road 2 comprises an electric capacity 21 and an inductance 22, electric capacity 21 and inductance 22 are connected in series, and resonance branch road 2 is connected in parallel with dc circuit breaker 3.A resonance branch road 2 and a protection branch road are connected in parallel, and the protection branch road comprises a nonlinear resistance 4.Dc circuit breaker 3 also is connected with a control system 1.

When dc circuit breaker 3 is disconnected, control system 1 is sent open command to dc circuit breaker 3, dc circuit breaker 3 receives the instruction back and produces electric arc, electric arc makes capacitor produce resonance current, this resonance current dc circuit breaker 3 of flowing through, make the resultant current of the dc circuit breaker 3 of flowing through zero crossing occur, thereby make dc circuit breaker 3 can realize blow-out and disconnection.After dc circuit breaker 3 disconnects; the voltage at capacitor two ends can raise moment; when the voltage at capacitor two ends is increased to the stop voltage of nonlinear resistance; the automatic conducting of nonlinear resistance 4 circuit; make electric current pass through nonlinear resistance 4; the voltage at limiting capacitance device two ends, thus play the effect of capacitor for voltage protection.

More than disclosed only be several specific embodiments of the application, but the application is not limited thereto, any those skilled in the art can think variation, all should drop in the application's the protection range.

Claims (3)

1. a dc circuit breaker capacitor is applied to it is characterized in that in the DC transmission system, constitutes the resonance branch road of electric capacity and inductance series connection after described capacitor is connected with a reactor, and this resonance branch road and dc circuit breaker are connected in parallel.
2. dc circuit breaker capacitor as claimed in claim 1 is characterized in that, a described resonance branch road and a protection branch road are connected in parallel.
3. dc circuit breaker capacitor as claimed in claim 2 is characterized in that, described protection branch road comprises a nonlinear resistance at least.
CN2010206212754U 2010-11-24 2010-11-24 Capacitor for direct-current circuit breaker CN201877823U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010206212754U CN201877823U (en) 2010-11-24 2010-11-24 Capacitor for direct-current circuit breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010206212754U CN201877823U (en) 2010-11-24 2010-11-24 Capacitor for direct-current circuit breaker

Publications (1)

Publication Number Publication Date
CN201877823U true CN201877823U (en) 2011-06-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010206212754U CN201877823U (en) 2010-11-24 2010-11-24 Capacitor for direct-current circuit breaker

Country Status (1)

Country Link
CN (1) CN201877823U (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103117528A (en) * 2013-01-17 2013-05-22 国网智能电网研究院 Series capacitor type high-voltage direct current breaker and control method thereof
CN103280763A (en) * 2013-02-27 2013-09-04 国网智能电网研究院 Direct current circuit breaker and realization method thereof
CN106921148A (en) * 2017-04-25 2017-07-04 安徽伊格瑞德电气设备有限公司 A kind of direct current on-off device based on LC in parallel
CN107210598A (en) * 2015-01-30 2017-09-26 通用电器技术有限公司 The DC breakers generated with reverse current
CN110190589A (en) * 2019-04-25 2019-08-30 国家电网有限公司 A kind of mode of resonance mixed style direct current switch

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103117528A (en) * 2013-01-17 2013-05-22 国网智能电网研究院 Series capacitor type high-voltage direct current breaker and control method thereof
CN103117528B (en) * 2013-01-17 2015-12-02 国网智能电网研究院 One seals in capacitive high voltage DC circuit breaker and control method thereof
CN103280763A (en) * 2013-02-27 2013-09-04 国网智能电网研究院 Direct current circuit breaker and realization method thereof
CN107210598A (en) * 2015-01-30 2017-09-26 通用电器技术有限公司 The DC breakers generated with reverse current
CN107210598B (en) * 2015-01-30 2019-06-25 通用电器技术有限公司 The DC breaker generated with reverse current
US10811864B2 (en) 2015-01-30 2020-10-20 General Electric Technology Gmbh DC circuit breaker with counter current generation
CN106921148A (en) * 2017-04-25 2017-07-04 安徽伊格瑞德电气设备有限公司 A kind of direct current on-off device based on LC in parallel
CN110190589A (en) * 2019-04-25 2019-08-30 国家电网有限公司 A kind of mode of resonance mixed style direct current switch

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Granted publication date: 20110622