我国电网防污闪措施的回顾和总结

Historical Review and Summary on Measures Against Pollution Flashover Occurred in Power Grids in China

阐述了我国电网的主要污闪事故以及大面积污闪的危害。总结了各个历史阶段我国在抗污闪方面的措施,提出绝缘子防冰闪、大型套管的防雨闪和复合绝缘子防鸟啄等都是防污闪工作的重要内容,最后指出,应在"绝缘到位,留有裕度"的基本原则下,制定电网灾害事故等级划分标准、绘制相应的灾害等级分布图、提高事故多发地区的设防标准,这对于防污闪工作具有重要意义。

The main pollution flashover faults occurred in power system in China and the harm of large-area pollution flashover are expounded. The measures against pollution flashover adopted by domestic power systems in different historical stages are summarized. It is pointed out that the measures against flashover, including anti-ice flashover of insulators, anti-wet flashover of large-sized bushings and anti-bird pecking of composite insulators, are important contents in this field. Finally, it is also pointed out that to draft the standard to graduate the class of power system accidents caused by natural disasters under the principle of “ensuring sufficient insulation level and reserving margin” and to draw corresponding distribution map of disaster class as well as to enhance the preventing level have great significance for the prevention of pollution flashover.