绝缘子覆冰闪络的主要影响因素分析  

Analysis on Main Influencing Factors of Icing Flashover of Insulators

作　　者：周华敏[1] 彭向阳[2] 毛先胤[2] 姚森敬[2] 贾志东[3] 

机构地区：[1]广东电网公司,广东广州510600 [2]广东电网公司电力科学研究院,广东广州510080 [3]清华大学深圳研究生院,广东深圳518055

出　　处：《广东电力》2011年第11期11-15,共5页Guangdong Electric Power

基　　金：国家自然科学基金项目(51077081)

摘　　要：根据覆冰闪络发展过程中泄漏电流的变化情况,阐述了绝缘子覆冰闪络的形成过程,并根据绝缘子覆冰闪络机理,从覆冰类型、覆冰量、污秽度、覆冰水电导率以及绝缘子串类型、海拔高度等主要影响因素对绝缘子覆冰闪络电压进行分析,认为雨凇、混合凇和硬雾凇是造成绝缘子覆冰闪络的主要原因。实验结果表明,覆冰水电导率对绝缘子冰闪电压的影响很大,具有憎水性和电热性能的绝缘子表面对提高绝缘子冰闪性能有一定的效果。In accordance to change of leakage current in development of icing flashover, the paper expounds formation process of icing flashover of insulators; besides, in the light of mechanism of flashover of icing flashover of insulators, it analyzes icing flashover voltage in respects of icing types, icing quantity, pollution grade, freezing water conductivity as well as types of insulator string, altitude and so forth. The paper believes that silver thaw, mixed-phase ice and hard rime are main causes for icing flashover. The experiment result shows that icing flashover voltage of insulators is influenced by freezing wa- ter conductivity to great extent and insulator surface with hydrophobic behavior and electrothermal property is helpful to improve icing flashover performance of insulators.

关 键 词：输电线路 绝缘子 覆冰闪络 影响因素 分析 

分 类 号：TM216[一般工业技术—材料科学与工程]