覆冰绝缘子闪络动态特性数值模拟

Numerical Simulation of Flashover Dynamic Characteristics of Ice-covered Insulator

依据冰闪电弧模型,以MATLAB为计算平台,揭示了直流电压下覆冰绝缘子放电电弧的动态特性。仿真结果表明:覆冰绝缘子的泄漏电流和电弧传播速度极性效应明显。在整个闪络过程90%时间内,局部电弧发展缓慢,最后闪络阶段发展速度剧增。仿真结果和人工覆冰绝缘子闪络实验数据基本吻合。

According to the ice flashover model,this paper reveals the dynamic characteristics of arc discharge on the surface of ice-covered insulators under the direct voltage based on MATLAB platform.Simulation results show the obvious polarity effect of the leakage current and arc propagation velocity of iced insulators.In the 90 percent of the whole process of flashover,partial discharge develops slowly,but the development of flashover goes up dramatically at the final stage.The simulation results are accordant with the experimental data of man-made ice-covered insulators flashover under the same experimental conditions.