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电网技术  2014 

直流输电线路单极接地双端故障测距

DOI: 10.13335/j.1000-3673.pst.2014.08.039, PP. 2268-2273

Keywords: 高压直流输电线路,故障测距,分布参数,时域,麦夸特法

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Abstract:

基于考虑多阶距离无穷小的高压直流输电线路分布参数时域模型,提出了一种高压直流输电线路单极接地双端故障测距方法。利用粒子群算法来搜索整条线路沿线电压分布差值最小的对应距离,即为实际故障距离;为便于高阶求导和平滑数据中的扰动,采用麦夸特法来拟合直流故障暂态数据。与Bergeron模型进行对比,结果表明所提方法对采样率要求低,抗噪声能力强,测距结果平稳,可以实现直流输电线路全线范围内的准确定位,且测距结果不受过渡电阻和故障位置的影响。

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