Firstly, some basic theories and on-line detecting measures existed of insulator contamination flashover are studied and analyzed, and the drawbacks are pointed out as well.

• 首先本文对绝缘子污闪机理进行仔细研究与分析,并对国内外现有的防污措施和在线监测方法进行了探讨,指出存在的不足之处。