220kV合成绝缘子闪络特性的仿真计算分析  

Simulation Analysis of Flashover Characteristics of 220 kV Composite Insulator

作　　者：刘艳 雷鸣[2] 刘刚[2] 

机构地区：[1]广东威恒输变电工程有限公司,广东佛山528000 [2]华南理工大学电力学院,广东广州510640

出　　处：《广东电力》2009年第7期1-3,61,共4页Guangdong Electric Power

基　　金：国家重点基础研究发展计划(973计划)(2009CB724507)

摘　　要：针对用复合绝缘子代替玻璃绝缘子对线路的闪络特性存在争议的问题,从绝缘子闪络特性及放电机理着手,通过计算机仿真软件对加载的正极性直流电压绝缘子电场进行仿真,研究分析闪络电弧动态变化,结合气体放电理论推导绝缘子直流闪络过程。通过研究合成绝缘子不同区段电场大小和随时间变化的态势,对合成绝缘子各自闪络路径进行预测。在此基础上,建立电弧-空气闪络电路模型,进行微分计算求解最小闪络电压,最后结合试验进行验证。As the flashover characteristics are controversial while replacing the glass insulator with the composite insulator, based on the flashover characteristics and discharge mechanism of insulator, the insulator is loaded with positive-polarity direct voltage to simulate electric field by computer simulation software, so as to analyze the dynamic changes of flashover arc. The DC flashover process of insulator is deduced in combination with the gas discharge theory. By studying the electric field changes and the trend with time of different sections of composite insulators, each composite insulator flashover path is predicted. On this basis, the arc-air flashover circuit model is established to solve the minimum flashover voltage with differential computation, which is verified combined with tests.

关 键 词：冲击特性 气体放电 雷击闪络 闪络电压 闪络路径 电路模型 

分 类 号：TM852[电气工程—高电压与绝缘技术]