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高压直流输电的发展对绝缘子抗污闪性能提出了更高的要求,研究直流电压下绝缘子污闪特性能够为高压直流外绝缘设计提供理论指导.本文综述了国内外近年来绝缘子直流污闪特性方面的研究成果,从直流污秽性质、直流污闪特性、直流污闪试验方法以及直流污闪模型等方面总结了绝缘子直流污闪的各种影响机理,并归纳出海拔高度、污秽度以及绝缘子的类型、形状参数和悬挂方式等因素对绝缘子直流污闪电压的影响规律,最后提出了直流污闪研究方向以及防治建议.

The development of HVDC transmission has proposed higher requirements for the anti-pollution flashover characteristics of insulators,and the study on pollution flashover characteristics of insulators under DC voltage will provide theoretical guidance for the design of HVDC external insulation.In this paper,the domestic and overseas researches on DC pollution flashover characteristics of insulators in recent years were reviewed.The impact mechanism on DC pollution flashover of insulators was summarized from DC pollution property,DC pollution flashover characteristics,DC pollution flashover experimental methods,and DC pollution flashover model,and then the influence rule of altitude,pollution,and the type,shape parameters,and suspension modes of insulators on DC pollution flashover voltage were concluded.Finnally,the advices on study and prevention of DC pollution flashover were proposed.