Closing Switching Overvoltage Analysis of 220 kV Power Cable Transmission Lines

ZHENG Yiming; LIU Shi; LIU Haojun; CAO Junping; LI Chen; JIANG Peng; YANG Yong

doi:10.13296/j.1001-1609.hva.2020.04.024

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Closing Switching Overvoltage Analysis of 220 kV Power Cable Transmission Lines

更新时间：2025-04-26

- Closing Switching Overvoltage Analysis of 220 kV Power Cable Transmission Lines
- High VoltageApparatus Vol. 56, Issue 4, Pages: 153-158(2020)
- 作者机构：
  
  国网浙江省电力公司电力科学研究院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2020.04.024
  CLC： TM75
- Published：2020
- 稿件说明：
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[1]郑一鸣,刘石,刘浩军,曹俊平,李晨,蒋鹏,杨勇.220 kV电力电缆线路合闸操作过电压分析[J].高压电器,2020,56(04):153-158.

ZHENG Yiming, LIU Shi, LIU Haojun, et al. Closing Switching Overvoltage Analysis of 220 kV Power Cable Transmission Lines[J]. High voltageapparatus, 2020, 56(4): 153-158.
[1]郑一鸣,刘石,刘浩军,曹俊平,李晨,蒋鹏,杨勇.220 kV电力电缆线路合闸操作过电压分析[J].高压电器,2020,56(04):153-158. DOI： 10.13296/j.1001-1609.hva.2020.04.024.

ZHENG Yiming, LIU Shi, LIU Haojun, et al. Closing Switching Overvoltage Analysis of 220 kV Power Cable Transmission Lines[J]. High voltageapparatus, 2020, 56(4): 153-158. DOI： 10.13296/j.1001-1609.hva.2020.04.024.

摘要

在一侧断路器断开状态下

某220 kV电缆线路线遥控合闸后两套纵联保护动作事故跳闸。巡检发现

该电力电缆C相接头击穿。为探究电力电缆在合闸过程中的过电压情况

分析事故原因

对修复后的电缆线路进行与事故情况同一状态下的线路投切试验

监测投切过程中的电压和电流情况。同时

针对线路空载合闸过程中电缆沿线各处可能存在的过电压情况

采用电磁暂态计算程序PSCAD

对该电缆线路合闸过电压进行仿真分析计算。最后

针对实测和仿真结果提出了运维对策。

Abstract

Two sets of longitudinal protections tripped after a 220 kV cable line was closed by one side circuit breaker with the disconnection of the other side circuit breaker.It was found by inspection that the connector of C phase power cable was broken down.In order to investigate the closing overvoltage of the power cables and analyze the cause of this breakdown

the repaired cable line was tested in line with the accident status

and the voltage and current in the switching process were monitored.At the same time

considering the overvoltage that may exist in the cable along the line during the no-load switching

the electromagnetic transient calculation program PSCAD was adopted to simulate and analyze the overvoltage of the cable.Finally

according to the measured and simulation results

the operation and maintenance countermeasures were put forward.

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