Study on Closing Inrush Current of Double Break Vacuum Circuit Breaker with Equalizing Capacitors

CHEN Hechong; CHEN Xuanshu; LIU Bo; DU Wei

doi:10.13296/j.1001-1609.hva.2020.04.005

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Study on Closing Inrush Current of Double Break Vacuum Circuit Breaker with Equalizing Capacitors

更新时间：2025-04-26

- Study on Closing Inrush Current of Double Break Vacuum Circuit Breaker with Equalizing Capacitors
- High VoltageApparatus Vol. 56, Issue 4, Pages: 29-34(2020)
- 作者机构：
  
  国网电力科学研究院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2020.04.005
  CLC： TM561.2
- Published：2020
- 稿件说明：
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[1]陈鹤冲,陈轩恕,刘波,杜玮.双断口真空断路器投入电容器的合闸涌流的研究[J].高压电器,2020,56(04):29-34.

CHEN Hechong, CHEN Xuanshu, LIU Bo, et al. Study on Closing Inrush Current of Double Break Vacuum Circuit Breaker with Equalizing Capacitors[J]. High voltageapparatus, 2020, 56(4): 29-34.
[1]陈鹤冲,陈轩恕,刘波,杜玮.双断口真空断路器投入电容器的合闸涌流的研究[J].高压电器,2020,56(04):29-34. DOI： 10.13296/j.1001-1609.hva.2020.04.005.

CHEN Hechong, CHEN Xuanshu, LIU Bo, et al. Study on Closing Inrush Current of Double Break Vacuum Circuit Breaker with Equalizing Capacitors[J]. High voltageapparatus, 2020, 56(4): 29-34. DOI： 10.13296/j.1001-1609.hva.2020.04.005.

摘要

考虑到双断口真空断路器存在操作分散性

一个断口先动作时

另一个断口上的均压电容会与该先动作的断口形成通路;同时均压电容上若提前储存有能量

是否会对涌流产生影响目前尚无研究。为解决该问题

文中展开了相关研究。首先通过建模

再进行数学公式推导并利用PSCAD/EMTDC软件进行仿真计算

分析了在此过程中

均压电容储存有能量的前提下

均压电容对涌流的抑制作用。并分析了后动作的断口的合闸相位对合闸涌流的幅值的影响。结果表明:在不考虑预计穿的情况下

合闸涌流的幅值由最后完成合闸动作的断口的合闸相位决定的;且涌流存在着稳态分量和高频暂态分量。运用选相合闸技术只能控制涌流的稳态分量的幅值

而高频暂态分量的振荡频率无法通过选相合闸技术进行控制。

Abstract

Considering the operational dispersion of double break vacuum circuit breaker

when one fracture moves first

the voltage-sharing capacitance on the other fracture will form a path to the fracture surface of the first action.At the same time

if there is energy stored ahead of time on the capacitance

whether it will affect the inrush current has not been studied.This paper deduces the formula and makes use of the PSCAD/EMTDC software to carry on the simulation calculation.In this paper

the effect of voltage equalizing capacitance on inrush current is analyzed under the condition that the average voltage capacitance has energy stored in the process.The effect of closing phase on the amplitude of closing inrush current is analyzed.It is concluded that the amplitude of closing inrush current is determined by the closing phase of the final closing operation without considering the predicted penetration.The paper also puts forward some suggestions on how to use phase selection and closing technology to restrain the closing inrush when the capacitor is put into the capacitor.

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