Research on 40.5 kV Two-break Vacuum Circuit Breaker for Switching Capacitor Banks

GENG Yingsan; CHEN Yuxiu; SUN Chao; YAN Jing; YAN Liping; QIN Chengwei; WANG Quan

doi:10.13296/j.1001-1609.hva.2016.08.005

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Research on 40.5 kV Two-break Vacuum Circuit Breaker for Switching Capacitor Banks

更新时间：2025-04-26

- Research on 40.5 kV Two-break Vacuum Circuit Breaker for Switching Capacitor Banks
- High VoltageApparatus Vol. 52, Issue 8, Pages: 24-28(2016)
- 作者机构：
  
  1. 西安交通大学电力设备电气绝缘国家重点实验室
  2. 麦克奥迪(厦门)电气股份有限公司
  3. 西安高压电器研究院有限责任公司
  4. 山东泰开真空开关有限公司
  5. 陕西宝光真空电器股份有限公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2016.08.005
  CLC： TM561.2
- Published：2016
- 稿件说明：
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[1]耿英三,陈榆秀,孙超,闫静,颜莉萍,秦成伟,王荃.40.5kV投切电容器组用双断口真空断路器的研究[J].高压电器,2016,52(08):24-28.

GENG Yingsan, CHEN Yuxiu, SUN Chao, et al. Research on 40.5 kV Two-break Vacuum Circuit Breaker for Switching Capacitor Banks[J]. High voltageapparatus, 2016, 52(8): 24-28.
[1]耿英三,陈榆秀,孙超,闫静,颜莉萍,秦成伟,王荃.40.5kV投切电容器组用双断口真空断路器的研究[J].高压电器,2016,52(08):24-28. DOI： 10.13296/j.1001-1609.hva.2016.08.005.

GENG Yingsan, CHEN Yuxiu, SUN Chao, et al. Research on 40.5 kV Two-break Vacuum Circuit Breaker for Switching Capacitor Banks[J]. High voltageapparatus, 2016, 52(8): 24-28. DOI： 10.13296/j.1001-1609.hva.2016.08.005.

摘要

针对40.5 k V真空断路器投切电容器组时重击穿概率高这一亟待解决的技术难题

利用串联断口技术实现电容器组电流开合

提出了40.5 k V双断口真空断路器的设计方案并进行了深入研究

以满足电力系统的要求。建立了由高频涌流振荡回路和工频振荡回路组成的容性电流开合试验回路

在试验样机上完成了多组背对背电容器组开合试验

表明双断口真空断路器可显著降低投切电容器组时的重击穿概率。采用合成试验方法对该样机进行了短路电流开合试验

表明双断口真空断路器具有足够的短路开断能力。为保证每个断口的工作负荷相近

对并联均压电容数值的选取进行了试验研究并确定了样机的优选值为400 p F。因此

文中提出的用于投切电容器组的40.5 k V双断口真空断路器设计方案是完全可行的。

Abstract

Restrike during interrupting capacitor banks with vacuum circuit breakers may lead to severe switching overvoltage. Reducing the probability of restrike during capacitive current breaking is the ultimate solution to suppress overvoltage. In this paper

a new design of vacuum circuit breaker with a very low probability of restrike was proposed based on the analysis of restrike mechanism. A two-break vacuum circuit breaker was presented to carry out the duty of capacitor bank switching

and further meet the requirement of power system. A capacitive current switching test circuit has been designed

which consists of a high frequency inrush current circuit and a power frequency circuit

to perform back-to-back capacitor banks switching test. The test result shows that twobreak vacuum circuit breakers can reduce the probability of restrike significantly. Short-circuit making and breaking capacity of the vacuum circuit breaker was validated by synthetic test. The optimum value of the shunt grading capacitor is 400 p F to ensure the stress of each break is approximately equal. So the design scheme of40.5 k V two-break vacuum circuit breaker for switching capacitor banks is completely feasible.

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