Simulation of Radial Breakdowns on the Breaker Grading Capacitor of 500 kV AC Filter

HUANG Heyan; LI Weiguo; LU Wenhao; ZHANG Changhong; CHEN Weimin; ZHOU Haibin

doi:10.13296/j.1001-1609.hva.2018.12.009

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Simulation of Radial Breakdowns on the Breaker Grading Capacitor of 500 kV AC Filter

更新时间：2025-04-26

- Simulation of Radial Breakdowns on the Breaker Grading Capacitor of 500 kV AC Filter
- High VoltageApparatus Vol. 54, Issue 12, Pages: 56-62(2018)
- 作者机构：
  
  南方电网超高压输电公司检修试验中心
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2018.12.009
  CLC： TM561
- Published：2018
- 稿件说明：
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[1]黄和燕,黎卫国,卢文浩,张长虹,陈伟民,周海滨.500 kV交流滤波器断路器均压电容器径向击穿仿真分析[J].高压电器,2018,54(12):56-62.

HUANG Heyan, LI Weiguo, LU Wenhao, et al. Simulation of Radial Breakdowns on the Breaker Grading Capacitor of 500 kV AC Filter[J]. High voltageapparatus, 2018, 54(12): 56-62.
[1]黄和燕,黎卫国,卢文浩,张长虹,陈伟民,周海滨.500 kV交流滤波器断路器均压电容器径向击穿仿真分析[J].高压电器,2018,54(12):56-62. DOI： 10.13296/j.1001-1609.hva.2018.12.009.

HUANG Heyan, LI Weiguo, LU Wenhao, et al. Simulation of Radial Breakdowns on the Breaker Grading Capacitor of 500 kV AC Filter[J]. High voltageapparatus, 2018, 54(12): 56-62. DOI： 10.13296/j.1001-1609.hva.2018.12.009.

摘要

为查明某换流站交流滤波器断路器均压电容器径向击穿的故障原因

利用ATP/EMTP对换流站第四大组交流滤波器进行建模

同时考虑均压电容器电容分布及外部污秽的影响

计算故障均压电容器绝缘筒内外壁电位差、故障点与断路器静触头电位差。仿真结果表明:均压电容器壁厚不足和外部污秽是导致径向击穿的根本原因。最后

采用三维有限元法仿真计算均压电容器内外电场分布

提出增加均压电容器壁厚或改用瓷外套均压电容器的整改方案。

Abstract

In order to find out the cause of radial breakdown on the breaker grading capacitor of 500 kV AC filter in a converter station

the simulation model of the fourth group AC filter of converter station is set up by ATP/EMTP.Taking into account the influence of the capacitance distribution and external contamination of the grading capacitor

the potential differences are studied within different positions

such as internal and external surface of the fault grading capacitor

the fault place and the static contact.The calculation results show that the main causes of radial breakdowns are insufficiency of wall thickness of the breaker grading capacitor and external pollution.Finally

the internal and external electric field distributions of the grading capacitor are analyzed by three-dimensional finite element method.The improvement program including increasing the thickness of the grading capacitor or changing into the porcelain grading capacitor are put forward.

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