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电网技术  2014 

邻近线路对皖电东送特高压线路工频参数测试的影响

DOI: 10.13335/j.1000-3673.pst.2014.05.006, PP. 1162-1168

Keywords: 皖电东送,特高压,同塔双回,工频参数,测试干扰,感应电压

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Abstract:

调查了1000kV皖电东送特高压输电线路邻近线路分布情况,提出了邻近线路在特高压线路上产生感应电压的计算方法,分析了土壤电阻率及平行接近距离对交流线路产生感应电压的影响规律,仿真计算得到了邻近线路在特高压线路上产生的感应电压值,并与现场测试结果进行了对比分析。结果表明皖电东送特高压同塔双回交流输电线路跨越、平行于多条±800、±500kV直流及500kV交流线路;特高压线路上的容性感应电压和感性感应电压均随着平行接近距离的增加而减小;容性感应电压的减小速率较快,感性感应电压的减小速率相对缓慢。土壤电阻率的变化对特高压线路上的容性感应电压几乎没有影响;而感性感应电压值随着土壤电阻率的增加而增大。皖电东送特高压线路上感应电压具有“静电感应电压较高,电磁感应电压相对较低”的特点。

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