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电网技术  2014 

基于分布参数的同杆双回线跨线及接地故障单端定位方法

DOI: 10.13335/j.1000-3673.pst.2014.09.033, PP. 2525-2531

Keywords: 同杆双回线,故障定位函数,分布参数,跨线故障,单端量

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Abstract:

提出一种考虑分布参数的同杆双回线跨线及接地故障单端定位方法。首先在考虑双回线线间耦合的分布参数线路模型中，借助同向零序补偿系数以及反向零序补偿系数，定义精确的补偿电压。然后，根据测量端反向序电流与故障处反向序电流相位的关系，推算故障处电压相位及幅值。最后，利用测量电压、电流以及推算故障处的电压构造故障定位函数，并通过求解相位突变点识别故障位置。仿真结果表明，该方法适用于多种跨线及接地故障，无需其他变电站的信息，且受故障位置、过渡电阻、相序排列等因素的影响小，定位精度高，易于实现。

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