覆冰复合绝缘子污秽模拟方法对交流闪络电压影响的等价性

Equivalence of Pollution Simulation Methods for AC Flashover Performance of Iced Composite Insulator

以FXBW-10/70型和FXBW-35/70型2种复合绝缘子为试品,在人工气候室模拟覆冰并进行试验,根据试验结果,基于污秽和覆冰的共同作用对绝缘子冰闪电压影响的结果一致的原则,提出了固体层法和覆冰水电导率法模拟污秽具有等价性并揭示了二者的等价关系。结果表明,固体层法与覆冰水电导率法对绝缘子冰闪影响的等价性与绝缘子结构和覆冰程度有关,不同污秽模拟方法得到的冰闪电压具有对应关系。

Ice-covered FXBW-10/70 and FXBW-35/70 insulators were taken as specimen and tested in the artificial climate chamber, and based on the supposition that the influence of icing on the flashover voltage of composite insulators is in accordance with that of pollution, an equivalence relationship between the solid-layer method and the icing-water-conductivity method in terms of impact on the flashover voltage of ice-covered composite insulators is proposed in this paper. The results show that the equivalence of the two methods in respect of influencing the flashover voltage of ice-covered composite insulators is determined by the configuration of insulators as well as the icing degree, and the flashover voltage of the ice-covered insulator tested with one pollution simulation method is coincident with another method for the same pollution level.