Detection and Electric Field Analysis of Surface Defects on Porcelain Post Insulator

ZHENG Zhong; FENG Wei; PAN Chunhui; ZHANG Changhong; LI Dong

doi:10.13296/j.1001-1609.hva.2015.12.007

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Detection and Electric Field Analysis of Surface Defects on Porcelain Post Insulator

更新时间：2025-04-26

- Detection and Electric Field Analysis of Surface Defects on Porcelain Post Insulator
- High VoltageApparatus Vol. 51, Issue 12, Pages: 38-42(2015)
- 作者机构：
  
  1. 华北电力大学新能源电力系统国家重点实验室
  2. 华北电力大学高电压与电磁兼容北京市重点实验室
  3. 深圳供电局有限公司
  4. 南方电网超高压输电公司检修试验中心
  5. 中国电力工程顾问集团华北电力设计院工程有限公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2015.12.007
  CLC： TM216
- Published：2015
- 稿件说明：
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[1]郑重,冯伟,潘春辉,张长虹,李冬.支柱瓷绝缘子表面缺陷的电场分析与检测[J].高压电器,2015,51(12):38-42.

ZHENG Zhong, FENG Wei, PAN Chunhui, et al. Detection and Electric Field Analysis of Surface Defects on Porcelain Post Insulator[J]. High voltageapparatus, 2015, 51(12): 38-42.
[1]郑重,冯伟,潘春辉,张长虹,李冬.支柱瓷绝缘子表面缺陷的电场分析与检测[J].高压电器,2015,51(12):38-42. DOI： 10.13296/j.1001-1609.hva.2015.12.007.

ZHENG Zhong, FENG Wei, PAN Chunhui, et al. Detection and Electric Field Analysis of Surface Defects on Porcelain Post Insulator[J]. High voltageapparatus, 2015, 51(12): 38-42. DOI： 10.13296/j.1001-1609.hva.2015.12.007.

摘要

高压支柱瓷绝缘子断裂而引发系统断电及设备损毁在电力系统中并不罕见。文中在充分统计故障规律的基础上

确定了断裂易发生位置

并针对断裂发生前期出现的表面缺陷状态进行了三维有限元分析

得出其表面电场变化的规律性

并依据该规律性设计了相应的故障检测方法。最后

文中讨论了该方法的灵敏度及抗干扰能力。

Abstract

The power grid has bad experiences with high voltage post insulator breakdown

which cause further power outage and equipment damage. The failure statistics shows the failure patterns and indicates the most vulnerable position along the pole. The precursory scenario of such breakdown

where a small groove appears at the bottom surface of the pole

is analyzed for the spatial electric field distribution using finite element method. The analyses show large electric field variation at the point of defect

which gives rise to an innovative approach to detect such defect prior to failures. The feasibility and sensitivity of such method is discussed and the online field interferences are cleaned.

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