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案例推理式输电线单端电流行波故障测距

DOI: 10.13334/j.0258-8013.pcsee.2015.06.012, PP. 1379-1389

Keywords: 故障测距,行波,波头标定,距离折算系数,案例推理,波形匹配,数据驱动

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Abstract:

针对线路单端电流行波故障测距因波头标定困难所导致的测距可靠性不高、难自动执行等不足,提出基于历史数据进行案例推理的经验学习式改进思路。首先分析线路故障实录行波的形态特征和影响故障距离折算的因素。针对故障的复发性和多厂家、跨平台、不同电压等级线路故障波形的相似性,对测距过程中的波头标定和距离折算2个关键阶段进行参数化、案例化描述,根据相应特征属性于历史案例库搜索最相近样本进行算法参数复用从而实现智能测距。该方法能够对复发性故障实现测距结论复用,能够对高相似度故障样本实现测距方法复用,测距效果随历史故障样本积累而提升。不同厂家行波装置获得的大量故障实录数据表明该方法可行、有效。

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