摘要
绝缘子表面污秽颗粒的粒径分布规律对研究绝缘子的污闪特性具有重要意义。文中通过开展自然积污试验,研究了不同类型绝缘子的积污颗粒粒径分布特性,重点分析复合绝缘子的积污过程,建立了颗粒物在硅橡胶表面沉降积聚的物理模型,并借助仿真软件分析了复合绝缘子表面粒径分布规律的形成机理,同时讨论了电荷积聚效应对积污的影响。结果表明,复合绝缘子表面沉积污秽颗粒的平均粒径略大于陶瓷和玻璃绝缘子,且粒径分布呈现对数正态分布规律,在20〜30μ m范围内表现出集中性。此外,若伞裙表面存在积聚电荷,则对大尺寸颗粒的吸附能力将会增加,从而表面积污量和颗粒平均粒径均会变得更大。
The particle size distribution of the contaminated particles on the surface of the insulator is of great significance for the study of pollution flashover characteristics of the insulator. In this paper,the particle size distribution characteristics of contaminated particles of different types of insulators are studied by way of carrying out natural contamination test. The process of contamination accumulation of the composite insulators is analyzed emphatically. The physical model of deposition and accumulation of particulate matters on the surface silicon rubber is set up. The formation mechanism of particle distribution on the surface of composite insulator is analyzed by means of simulation software and,at the same time,the influence of charge accumulation effect on contamination is also discussed. The results show that the average size of the contaminated particles on the surface of composite insulators is slightly larger than that of porcelain and glass insulators and the particle size distribution shows the law of log-normal distribution,showing the concentration within the range of 20~30 μm. In addition,in case of existing accumulated charge on the shed surface,the ability to absorb large-size particles will increase,thus the amount of surface contamination and average size of particles will become larger.
作者
江渺
姜昀芃
卢明
李黎
JIANG Miao;JIANG Yunpeng;LU Ming;LI Li(State Key Laboratory of Advanced Electromagnetic Engineering and Technology,Huazhong University of Science&Technology,Wuhan 430074,China;State Grid Henan Electric Power Research Institute,Zhengzhou 450052,China)
出处
《高压电器》
CAS
CSCD
北大核心
2021年第12期17-24,共8页
High Voltage Apparatus
基金
国家自然科学基金资助项目(51777082)。
关键词
复合绝缘子
自然积污试验
污秽颗粒
粒径分布
电荷积聚
composite insulator
natural contamination test
contaminated particle
particle size distribution
charge accumulation
作者简介
江渺(1997-),男,硕士研究生,研究方向为高电压与绝缘技术;通信作者:李黎(1976-),男,博士,教授,研究方向为高电压与绝缘技术、输变电设备智能运维等(E-mail:leeli@hust.edu.cn)。
