典型表面状态下的绝缘子空间电场特性研究  

Electric field characteristics of polluted insulator space under typical surface state

作　　者：黄宵宁[1] 刘锦 杨成顺[1] 毕晓甜 高嵩 张东东 HUANG Xiaoning;LIU Jin;YANG Chengshun;BI Xiaotian;GAO Song;ZHANG Dongdong(School of Electric Power Engineering,Nanjing Institute of Technology,Nanjing 211167,China;State Grid Jiangsu Electric Power Co.,Ltd.Research Institute,Nanjing 211103,China;State Key Laboratory of Power Transmission Equipment and System Security and New Technology(Chongqing University),Chongqing 400044,China)

机构地区：[1]南京工程学院电力工程学院,江苏南京211167 [2]国网江苏省电力有限公司电力科学研究院,江苏南京211103 [3]输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆400044

出　　处：《电力工程技术》2020年第3期144-150,共7页Electric Power Engineering Technology

基　　金：国家重点研发计划资助项目(2016YFB0900904);江苏省自然科学基金资助项目(BK20181021)。

摘　　要：目前通常依靠监测绝缘子表面泄漏电流来实现污闪预警,该方法作为一种接触式在线监测手段,在可靠性、便捷性等方面仍有很大的提升空间,且已有研究指出可通过非接触方式进行有效监测。因此,文中研究典型表面状态下绝缘子空间电场分布特性,利用有限元仿真软件建立了普通支柱绝缘子的静电场仿真模型,对比分析了干燥、湿润、放电情况下的绝缘子周围空间电场的幅值大小及变化规律;利用人工污秽试验验证仿真结果。研究结果表明,不同表面状态下的绝缘子空间电场所反映的幅值大小差异明显,在表面湿润及有电弧爬电的情况下,空间电场垂直分量分别增长近50%和20%。研究结果可为输配电外绝缘的状态监测提供新思路。At present,it usually relies on monitoring the surface leakage current of the insulator to realize the flashover warning.As a contact online monitoring method,it still has much room for improvement in terms of reliability and convenience.However,studies have indicated that it can be effectively monitored in a non-contact manner.Therefore,the electric field distribution characteristics of insulator space under typical surface conditions are studied.Firstly,the electrostatic field simulation model of common post insulators is established by using finite element simulation software.The magnitude of the electric field around the insulator under dry,wet and discharge conditions and the law of change are compared and analyzed.Finally,the artificial contamination test is used to verify the simulation results.The results show that the magnitude of the amplitude reflected by the insulator space in different surface states is obvious.Under the condition of surface wetting and arc creepage,the vertical component of the spatial electric field increases by nearly 50%and 20%,respectively.The research results can provide new ideas for condition monitoring of transmission and distribution external insulation.

关 键 词：绝缘子 污闪 有限元 空间电场 运行状态 

分 类 号：TM216.1[一般工业技术—材料科学与工程]