Modeling of Insulator DC Pollution Flashover Under Windward/Leeward Side Non-uniform Pollution

ZHANG Dongdong; NI Xijun; WANG Shuzheng; HAO Sipeng; ZHANG Zhijin

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Modeling of Insulator DC Pollution Flashover Under Windward/Leeward Side Non-uniform Pollution

更新时间：2025-12-08

- Modeling of Insulator DC Pollution Flashover Under Windward/Leeward Side Non-uniform Pollution
- Vol. 46, Issue 8, Pages: 2880-2889(2020)
- 作者机构：
  
  1. 南京工程学院江苏省配电网智能技术与装备协同创新中心
  2. 重庆大学输配电装备及系统安全与新技术国家重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：31 August 2020，
  
  Published：2020
- 稿件说明：
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ZHANG Dongdong, NI Xijun, WANG Shuzheng, et al. Modeling of Insulator DC Pollution Flashover Under Windward/Leeward Side Non-uniform Pollution[J]. 2020, 46(8): 2880-2889.
DOI：

ZHANG Dongdong, NI Xijun, WANG Shuzheng, et al. Modeling of Insulator DC Pollution Flashover Under Windward/Leeward Side Non-uniform Pollution[J]. 2020, 46(8): 2880-2889. DOI：

摘要

绝缘子表面不均匀积污会影响其电气特性。运行环境下绝缘子串迎风面和背风面污层分布不均匀

且根据人工污秽试验结果

这会导致绝缘子闪络耐受梯度降低。在此基础上

文中提出了考虑绝缘子迎/背风面不均匀污层的计算剩余污层电阻方法

并建立了相应的直流污闪动态电弧模型

同时开展了人工污秽模拟验证试验;继而

基于动态闪络模型

对不同不均匀染污程度下的绝缘子表面泄漏电流、剩余污层电阻进行了计算及分析

揭示了迎/背风侧不均匀污秽对绝缘子直流污闪的影响。研究结果表明

迎/背风侧不均匀污层造成污闪过程中的绝缘子剩余污层电阻减小

减小幅度可达50%;背风侧面积比例T对绝缘子直流污闪过程的影响小于迎/背风面染污不均匀度J。研究结果可以为复杂环境下的架空线路外绝缘配置及选型提供参考。

Abstract

Non-uniform pollution on insulator surface affects its electric properties. In field operating conditions

the pollution on insulator surface may distribute non-uniformly between windward and leeward sides

leading to a lower flashover voltage gradient according to artificial pollution tests. Thereby

we proposed a calculation method for the residual pollution layer resistance of windward/leeward side non-uniform polluted insulator

established a dynamic model for the corresponding insulator dc flashover

and experimentally carried out verification. Then

using this model

we calculated and analyzed the leakage current as well as dynamic residual pollution layer resistance under different pollution non-uniformity. Research results indicate that

during insulator dc flashover

the residual pollution layer resistance can be lowered by 50% under windward/leeward side non-uniform pollution compared with that under uniform pollution condition. The effect of leeward side area ratio T is less than that of windward/leeward side non-uniform ratio J on insulator dc flashover process. Research results can provide certain references for the better configuration and selection of transmission line external insulation.

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Related Institution

State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University

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Graduate School at Shenzhen, Tsinghua University

Shanxi Electric Power Research Institute

State Key Laboratory of Control and Simulation of Power System and Generation Equipment, Tsinghua University

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