强电磁干扰环境下隔离开关回路电阻测量方法的优化
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摘要
根据一例隔离开关回路电阻试验,分析试验场地的电磁环境,通过计算试验环境的电磁场及试验回路中的感应电压,得到强电磁干扰为造成隔离开关回路电阻测量数据失真的重要原因之一的结论。通过优化隔离开关测量回路接线方式,减小变电站中强磁场对隔离开关测量回路电阻的影响,使隔离开关回路电阻测量值更加准确可靠,从而提高电网隔离开关回路电阻测试的准确性和隔离开关检修的生产效率。
According to a disconnector circuit resistance test,electromagnetic environment of the test site is analyzed. By calculating the electromagnetic field in the test environment and the induced voltage in the test circuit,the electromagnetic interference has been proved to be an important reason for the distortion of the disconnector circuit resistance. By improving the wiring method of disconnector measuring circuit,the influence of electromagnetic interference on measuring the resistance of the disconnector is reduced. The measured value of disconnector circuit resistance is more accurate and reliable,which improves the accuracy while testing disconnector circuit resistance and the production efficiency during grid maintenance.
According to a disconnector circuit resistance test,electromagnetic environment of the test site is analyzed. By calculating the electromagnetic field in the test environment and the induced voltage in the test circuit,the electromagnetic interference has been proved to be an important reason for the distortion of the disconnector circuit resistance. By improving the wiring method of disconnector measuring circuit,the influence of electromagnetic interference on measuring the resistance of the disconnector is reduced. The measured value of disconnector circuit resistance is more accurate and reliable,which improves the accuracy while testing disconnector circuit resistance and the production efficiency during grid maintenance.
引文
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[8]Project UHV.Transmission line reference book:345 k V and above[M].California,USA:Electric Power Research Institute,1975.
[2]王富勇,陈华桂.基于电热场影响的户外隔离开关触头发热分析[J].高压电器,2011,47(11):81-86.
[3]电力设备预防性试验规程:DL/T 596—2015[S].
[4]李春松.高压断路器回路电阻测试数据分析及处理措施[J].湖南水利水电,2011(5):69-70,72.
[5]鲜青龙,李梅.回路电阻测试仪工作原理及常见故障处理[J].科技信息,2013(6):494-494.
[6]刘立刚,崔贺平,王士化.断路器导电回路直流电阻测试数据分析[J].华北电力技术,2012(6):20-22.
[7]韩宇南,吕英华,杜鹃,等.高压输电线磁感应强度对人体感应电流的计算[C]//中国通信学会.第十五届全国电磁兼容学术会议论文集,2005:76-79.
[8]Project UHV.Transmission line reference book:345 k V and above[M].California,USA:Electric Power Research Institute,1975.