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±500kV直流输电线路自然积污规律分析研究

DOI: 10.16188/j.isa.1003-8337.2015.04.006, PP. 25-31

Keywords: ±kV直流输电线路,绝缘子污秽,积污特性,离子成分,等值盐密

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Abstract:

为研究高压直流输电线路积污特性,准确设计线路绝缘配置,通过对兴安±500kV直流输电线路沿线具有代表性、典型性的运行绝缘子串开展人工污秽度取样与测量,对绝缘子自然积污特性及污秽化学成分的来源开展研究。结果表明:±500kV直流输电线路绝缘子串积污情况受大气环境的影响,影响的大小随着离污染源距离的变化而变化;不同污染源生成的污染物不同,对绝缘子表面积污情况的影响也不同;各因素中,材质对积污的影响最大,其次是污染源,最后是直流极性的影响;而同一环境下,直流线路直流极类型对绝缘子污秽度基本没有影响。文章同时分析了±500kV直流输电线路污秽物阴阳离子成分,研究成果可指导运行部门优化架空输电线路的外绝缘配置、制定运行维护策略。

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