运行工况下交流GIS绝缘子表面微金属颗粒运动诱发沿面闪络的研究  

Study on the Development of Surface Flashover Induced by the Motion of Micro-metal Particle on the Surface of AC GIS Spacers Under Operation Condition

作　　者：许渊 刘卫东[2] 陈维江 李星 殷禹 毕建刚 崔博源 牛勃 XU Yuan;LIU Weidong;CHEN Weijiang;LI Xing;YIN Yu;BI Jiangang;CUI Boyuan;NIU Bo(School of Electrical&Electronic Engineering,North China Electric Power University,Changping District,Beijing 102206,China;Department of Electrical Engineering,Tsinghua University,Haidian District,Beijing 100084,China;State Grid Corporation of China,Xicheng District,Beijing 100031,China;China Electric Power Research Institute,Haidian District,Beijing 100192,China;State Grid Ningxia Electric Power Research Institute,Yinchuan 750011,Ningxia Hui Autonomous Region,China)

机构地区：[1]华北电力大学电气与电子工程学院,北京市昌平区102206 [2]清华大学电机工程与应用电子技术系,北京市海淀区100084 [3]国家电网有限公司,北京市西城区100031 [4]中国电力科学研究院有限公司,北京市海淀区100192 [5]国网宁夏电力有限公司电力科学研究院,宁夏回族自治区银川市750011

出　　处：《电网技术》2020年第4期1596-1602,共7页Power System Technology

基　　金：国家电网公司科技项目(5442GY180033)。

摘　　要：近年来,GIS绝缘故障频发,为降低GIS故障率,保障供电安全,亟需解决GIS绝缘子沿面闪络诱因问题。根据以往研究,GIS绝缘子沿面闪络诱因主要怀疑是绝缘子表面微金属颗粒,但至今仍未发现运行工况下微金属颗粒诱发沿面闪络的放电机制和放电发展过程。为此建立了GIS绝缘子表面微金属颗粒运动和高灵敏脉冲电流局部放电观测实验平台,以5mm微金属颗粒为对象,实验发现运行工况下微金属颗粒运动诱发沿面闪络的现象,并观测到其局部放电发展过程,通过电场仿真、力学分析和实验研究了闪络机制,揭示了一种微金属颗粒诱发GIS绝缘子沿面闪络的诱因。In recent years, GIS insulation faults occur frequently. In order to reduce GIS failures and ensure power grid safety, it is urgent to find out the causes of flashover of GIS spacers along surfaces. In previous studies, the cause of surface flashover of GIS spacers is mainly suspected to be metal particles on spacer surface. However, the discharge mechanism and discharge development process of the surface flashover induced by micro-metal particles under operating conditions were not found. Therefore, an experimental platform for observation of micro-metal particle motion and high-sensitivity pulse current partial discharge on GIS spacer surface was established. Taking 5 mm micro-metal particles as the object, the phenomenon of surface flashover induced by micro-metal particles under operating conditions was found. And the development process of its partial discharge was observed. The flashover mechanism was studied with electric field simulation, mechanical analysis and experiment, and the cause of a micro-metal particle induced flashover on the surface of GIS spacer was revealed.

关 键 词：运行工况 GIS 绝缘子表面 微金属颗粒 运动 沿面闪络 局部放电 

分 类 号：TM721[电气工程—电力系统及自动化]