Influence of Pollution Components on Surface Electric Field of Composite Insulators

Sihua WANG; Junjun WANG; Lei ZHAO; Long CHEN

doi:10.11930/j.issn.1004-9649.202011094

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Influence of Pollution Components on Surface Electric Field of Composite Insulators

Power System | 更新时间：2025-06-18

- Influence of Pollution Components on Surface Electric Field of Composite Insulators
- Electric Power Vol. 54, Issue 7, Pages: 149-157(2021)
- 作者机构：
  
  1.兰州交通大学自动化与电气工程学院，甘肃兰州　730070
  2.甘肃省轨道交通电气自动化工程实验室（兰州交通大学），甘肃兰州　730070
- 作者简介：
- 基金信息：
  
  This work is supported by National Natural Science Foundation of China (Research on Dynamic Pollution Accumulator Law and Pollution Flashover Prediction Method of Ocs Insulators in Saline Dust Area, No.51767014; Research on Dancing Discharge Characteristics and Prevention Technology of Additional Wire of Ocs of Lanzhou-Xinjiang High-Speed Railway under Wind and Sand Environment, No.51867013) and the Science and Technology Research and Development Program of China Railway Corporation (Study on Dynamic Contamination of Insulator in Saline Dust Area and its Prevention and Control Technology, No.2017010-C).
- DOI：10.11930/j.issn.1004-9649.202011094
  CLC：
- Received：20 November 2020，
  
  Revised：2020-12-18，
  
  Published：05 July 2021
- 稿件说明：
移动端阅览
Sihua WANG, Junjun WANG, Lei ZHAO, et al. Influence of Pollution Components on Surface Electric Field of Composite Insulators[J]. Electric power, 2021, 54(7): 149-157.
DOI：

Sihua WANG, Junjun WANG, Lei ZHAO, et al. Influence of Pollution Components on Surface Electric Field of Composite Insulators[J]. Electric power, 2021, 54(7): 149-157. DOI： 10.11930/j.issn.1004-9649.202011094.

摘要

绝缘子表面积污是造成污闪事故的主要原因，污秽成分对绝缘子电气性能产生不同的影响。为研究污秽成分对绝缘子表面电场的影响，以青藏铁路沿线格尔木市作为绝缘子实际运行环境，构建复合绝缘子简化模型。经过仿真发现，污秽干燥时对绝缘子表面电场的影响程度由高到低的次序为CaSO

、KNO

、NaNO

、K

、NaCl、MgSO

，主要由介质的相对介电常数决定；当污秽湿润时对绝缘子表面电场的影响程度由高到低的次序为氯化钠、硝酸盐、硫酸盐，各污液的电导率成为影响电场分布的主要因素。而憎水性的有无也会影响绝缘子的电场分布，有干燥带的绝缘子整体场强高于没有干燥带存在的绝缘子，通过仿真结果与试验结果比较得以验证。该结论从电场分布的角度解释了污秽成分对绝缘子绝缘性能的影响，为地区污秽等级划分和实验室绝缘子积污试验提供了新的思路。

Abstract

Surface pollution of insulators is the main cause of pollution flashover

and the pollution components have different effects on the electrical performances of insulators. In order to study the influence of pollution components on the surface electric field of insulators

a simplified model of composite insulators was established by taking Golmud city along the Qinghai-Tibet Railway as the actual operation environment of insulators. It is found through simulation that when the contaminants are dry

their influence on the surface electric field of insulator follows the tendency from high to low as CaSO

＞KNO

＞NaNO

＞K

＞NaCl＞MgSO

which is mainly determined by the relative dielectric constant of the medium; when the contaminants are wet

their influence follows the tendency as sodium chloride ＞ nitrate ＞ sulfate

and the conductivity of each polluted liquid becomes the main factor affecting the electric field distribution. The hydrophobicity also affects the electric field distribution of insulators

and the overall electric intensity of insulator with drying zone is higher than that without drying zone. The simulation results were verified by the experimental results. The conclusion explains the influence of pollution components on insulator’s insulation performance from the perspective of electric field distribution

and can provide a new idea for regional pollution classification and insulator contamination test in laboratory.

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Keywords

references

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