通过研究相同结构高度、不同伞裙结构的复合绝缘子对耐污闪电压的影响，发现复合绝缘子的耐污闪电压不随其爬电距离的增加而线性增大。基于兰州特殊的地理环境，分析了不同伞裙结构复合绝缘子的耐污闪性能，认为五伞结构的复合绝缘子耐污闪性能较好，能够满足兰州地区110 kV线路外绝缘的配置要求。
In order to increase the anti-pollution flashover performance of 110 kV line, Lanzhou Power Supply Company proposed the higher allocation requirements of external insulation. Through studying the effect of different umbrella structure of the composite insulators with the same structural height on the pollution flashover voltage, it is discovered that the pollution flashover voltage does not linear increase with the increase of creepage distance. Based on the special geographical environment of Lanzhou, the an-ti-pollution flashover performance of the composite insulators with different umbrella structure was ana-lyzed. The results show that the anti-pollution flashover performance of the composite insulators with five-umbrella structure is the best, which can satisfy the allocation requirements of external insulation of 110 kV line in Lanzhou area.
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