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500kV输电线路中低零值绝缘子对长串绝缘子电位和电场分布的影响

DOI: 10.16188/j.isa.1003-8337.2015.03.006, PP. 29-34

Keywords: 有限元,零值绝缘子,低值绝缘子,电压,场强

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Abstract:

应用有限元软件Ansys分析了500kV输电线路中零值和低值绝缘子及其位置、片数不同对整串绝缘子电位和电场分布的影响。结果表明:零值绝缘子比低值绝缘子对绝缘子串的影响要大,离劣化绝缘子越近电压和电场的影响越大;劣化绝缘子位于导线端和横担端对绝缘子串电压和场强的影响,比位于中部的影响大;多片劣化绝缘子连续分布比不连续分布对绝缘子串电压和场强的影响大;按在线测量分布电压法来检测劣化绝缘子,此方法的误判率和漏检率都很高。

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