大气腐蚀性因子对陶瓷绝缘子闪络性能的影响

Influence of Atmospheric Corrosive Factors on Flashover Performance of Ceramic Insulators

针对工业大气腐蚀严重地区广泛服役的陶瓷绝缘子,考察了其运行环境和表面污秽成分,结合大气腐蚀数据并与其他同样污秽等级地区绝缘子污秽成分进行了对比。结果表明,处于大气腐蚀严重区域的绝缘子,发生污闪的可能性高于处于其他同样污秽等级地区绝缘子。空气中的腐蚀性因子即便在湿度不高的环境下,依然会在绝缘子表面形成富含电解质的薄液膜,配合金属微粒的作用,形成空气电离通道,最终发生了闪络。研究结果有助于优化现行的绝缘子选用策略,为该环境下绝缘子防污闪措施提供参考。

This paper aims at the ceramic insulators widely used in areas with severe industrial atmospheric corrosion to examine the operating environment and surface pollution components,and then combines with the atmospheric corrosion data and makes comparison with the pollution composition of insulators in other areas with the same pollution grade.The results are shown as follows:The insulators in areas with severe atmospheric corrosion are more likely to have pollution flashover than those in other areas with the same pollution level.The corrosive factor in the air,even in a low humidity environment,will still form a thin liquid film rich in electrolytes on the surface of the insulator,cooperating with the action of metal particles to form an air ionization channel,and eventually flashover occurs.The research results help to optimize the current insulator selection strategy and also provide reference for insulator anti-pollution flashover measures in this environment.