Calculation and Analysis on Main Insulation Flashover Fault of Circuit Breaker Caused by Lightning Overvoltage

LI Shuang; GENG Lina; ZHONG Yafeng; HAN Honggang

doi:10.13296/j.1001-1609.hva.2015.02.013

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Calculation and Analysis on Main Insulation Flashover Fault of Circuit Breaker Caused by Lightning Overvoltage

更新时间：2025-04-26

- Calculation and Analysis on Main Insulation Flashover Fault of Circuit Breaker Caused by Lightning Overvoltage
- High VoltageApparatus Vol. 51, Issue 2, Pages: 84-87+93(2015)
- 作者机构：
  
  国网辽宁省电力有限公司电力科学研究院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2015.02.013
  CLC： TM561
- Published：2015
- 稿件说明：
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[1]李爽,耿莉娜,钟雅风,韩洪刚.雷电过电压引起断路器主绝缘闪络故障计算与分析[J].高压电器,2015,51(02):84-87+93.

LI Shuang, GENG Lina, ZHONG Yafeng, et al. Calculation and Analysis on Main Insulation Flashover Fault of Circuit Breaker Caused by Lightning Overvoltage[J]. High voltageapparatus, 2015, 51(2): 84-87+93.
[1]李爽,耿莉娜,钟雅风,韩洪刚.雷电过电压引起断路器主绝缘闪络故障计算与分析[J].高压电器,2015,51(02):84-87+93. DOI： 10.13296/j.1001-1609.hva.2015.02.013.

LI Shuang, GENG Lina, ZHONG Yafeng, et al. Calculation and Analysis on Main Insulation Flashover Fault of Circuit Breaker Caused by Lightning Overvoltage[J]. High voltageapparatus, 2015, 51(2): 84-87+93. DOI： 10.13296/j.1001-1609.hva.2015.02.013.

摘要

为了更明晰地描述雷电故障的暂态过程

笔者根据故障的实际情况

利用EMTP中的models语言

建立了断路器盆式绝缘子闪络的暂态数学模型

模型中考虑了线路在高频下的频关效应和集肤效应

并从盆式绝缘子发生闪络和不发生闪络2种情况来分析雷电过电压的暂态特性。另外

研究了计及冲击电晕时的雷电暂态特性

对比了不考虑冲击电晕时的雷电暂态特性。研究表明

断路器断口处雷电过电压的幅值超过了雷电冲击耐受电压是其击穿的主要原因;反击雷电过电压幅值低于绕击过电压;当计及冲击电晕时

雷电波形的幅值会下降

阻尼增大

波速降低。

Abstract

To clearly discribe the transient process of lightning fault in a circuit breaker

a transient mathematical flashover model of basin-type insulator is constructed with the programing language models in EMTP

in which frequency effect and skin effect of overhead line in high-frequency domain are considered.The transient characteristics of lightning are analyzed for basin-type insulator with and without flashover.Moreover

the transient characteristics considering impulse corona are analyzed

and compared with those without considering impulse corona. The results illustrate that: 1 the breakdown of the circuit breaker is mainly due to the amplitude of lightning overvoltage on basin-type insulator exceeding its withstand limit（1 050 kV）; 2 the amplitude of back flash overvoltage is lower than that of the shielding failure overvoltage; and 3 when impulse corona is taken into account

the amplitude of lightning waveform decreases

the damping increases

and the wave volecity slows.

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