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电网技术  2007 

华东电网500 kV线路历年污闪事故分析及外绝缘配置优化研究

, PP. 47-51

Keywords: 输电线路,外绝缘,污闪,积污特性,绝缘配合,爬距

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Abstract:

对华东电网500kV线路发生的污闪事故分析表明,爬距不足和绝缘子伞型不合理是造成线路污闪的最主要原因。根据污闪事故分析,以及为确认线路的安全运行状况,对不同串型、不同形式500kV线路绝缘子串进行了不同污秽度下的污秽试验,得到了不同试品的污耐压曲线,试验结果为500kV线路的污秽外绝缘配置以及正确选型提供参考依据。在此基础上,通过总结华东电网超高压线路的运行经验,并结合试验研究和实际工程应用的基础,研究了各种绝缘子积污特性和爬距有效利用系数,对华东电网500kV线路提出了合理的外绝缘配置。

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