Inaccuracy of Insulation Coordination for MOA of Step-down Operation AC Overhead Transmission Line

LIU Jing; ZHANG Mingxiang; WANG Qingjun; CHENG Dengfeng

doi:10.13296/j.1001-1609.hva.2014.06.021

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Inaccuracy of Insulation Coordination for MOA of Step-down Operation AC Overhead Transmission Line

更新时间：2025-04-26

- Inaccuracy of Insulation Coordination for MOA of Step-down Operation AC Overhead Transmission Line
- High VoltageApparatus Vol. 50, Issue 6, Pages: 128-132(2014)
- 作者机构：
  
  1. 安徽省电力科学研究院
  2. 安徽省电力设计研究院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2014.06.021
  CLC： TM863
- Published：2014
- 稿件说明：
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[1]刘静,张名祥,王庆军,程登峰.降压运行交流架空输电线路出线避雷器绝缘配合问题[J].高压电器,2014,50(06):128-132.

LIU Jing, ZHANG Mingxiang, WANG Qingjun, et al. Inaccuracy of Insulation Coordination for MOA of Step-down Operation AC Overhead Transmission Line[J]. High voltageapparatus, 2014, 50(6): 128-132.
[1]刘静,张名祥,王庆军,程登峰.降压运行交流架空输电线路出线避雷器绝缘配合问题[J].高压电器,2014,50(06):128-132. DOI： 10.13296/j.1001-1609.hva.2014.06.021.

LIU Jing, ZHANG Mingxiang, WANG Qingjun, et al. Inaccuracy of Insulation Coordination for MOA of Step-down Operation AC Overhead Transmission Line[J]. High voltageapparatus, 2014, 50(6): 128-132. DOI： 10.13296/j.1001-1609.hva.2014.06.021.

摘要

某省某降压运行线路

因遭受远区雷击发生跳闸事故

线路绝缘未闪络

站内避雷器损坏。通过对线路雷击跳闸分析、避雷器解体检查以及仿真计算

判断线路出线避雷器损坏的原因是降压运行线路因线路参数发生变化

在特殊工况下承受较大操作冲击电流

超过避雷器所能承受能量

使避雷器击穿。通过理论和电磁暂态仿真计算

提出降压运行线路

应校核避雷器标称放电电流和线路放电等级

合理选择避雷器的技术参数

提高线路运行可靠性和避雷器使用寿命。

Abstract

In this paper

starting form an accident of step-down operation line

which MOA in substation damaged but line insulation not flashover during a lightning shield failure occurred far from substation.Through the analysis of the shield failure accident

disintegration of MOA

via simulating calculation

conclude that MOA breakdown when it can’t withstand the power under special conditions. Through theoretical and simulation calculation

it suggest that discharge current of arrester and transmission line discharge class of step-down operation line should be checked to improve the reliability of transmission line and service life of MOA.

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