Research on zero-value detection on 220 kV double-string porcelain insulators based on the spatial electric field

郝金鹏; 霍耀佳; 侯凯; 柳皓; 王一波; 李泽成

doi:10.3969/j.issn.1672-3643.2025.06.005

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Research on zero-value detection on 220 kV double-string porcelain insulators based on the spatial electric field

更新时间：2026-01-09

- Research on zero-value detection on 220 kV double-string porcelain insulators based on the spatial electric field
- Ningxia Electric Power Issue 6, (2025)
- 作者机构：
  
  宁夏电力能源科技有限公司,宁夏,银川,750011
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.1672-3643.2025.06.005
  CLC：
- Published Online：22 December 2025，
  
  Published：22 December 2025
- 稿件说明：
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郝金鹏, 霍耀佳, 侯凯, et al. Research on zero-value detection on 220 kV double-string porcelain insulators based on the spatial electric field[J]. Ningxia Electric Power, 2025, (6).
DOI：

郝金鹏, 霍耀佳, 侯凯, et al. Research on zero-value detection on 220 kV double-string porcelain insulators based on the spatial electric field[J]. Ningxia Electric Power, 2025, (6). DOI： 10.3969/j.issn.1672-3643.2025.06.005.

摘要

绝缘子是输电线路的重要组成部分，瓷质绝缘子在线路中的应用尤为广泛。当瓷质绝缘子串中存在零值绝缘子时，其污闪概率和过电压下的闪络概率会显著增加，严重威胁电网安全。本文通过建立有限元电场仿真模型，分析了220 kV双联瓷绝缘子串完好和存在劣化时的电场分布特性，并通过实际带电线路实测验证了基于空间电场分布判断220 kV双联瓷绝缘子中零值缺陷的可行性。研究结果表明，沿绝缘子串的空间电场幅值出现明显“跌落”时，可判别对应测量时刻绝缘子片出现零值或劣化现象。利用绝缘子的空间电场分布，可以实现220 kV双联瓷绝缘子的零值检测。

Abstract

Insulators are essential components of transmission lines

and porcelain insulators are particularly widely used.When a zero-value insulator is present in a porcelain insulator string

the risk of pollution flashover and overvoltage flashover increases significantly

posing a severe threat to the safety of the power grid.In this study

a finite-element simulation model of the electric field for 220 kV double-string porcelain insulator was established to analyze the spatial electric field distribution under both normal and degraded conditions.The feasibility of detecting zero-value defects based on spatial electric field characteristics was verified through live-line measurements.The results show that when a pronounced “drop” in the spatial electric field amplitude occurs along the insulator string

a corresponding insulator unit can be identified as zero-value or deteriorated.Therefore

by analyzing the spatial electric field distribution

zero-value detection of 220 kV double-string porcelain insulators can be effectively achieved.

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