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雷击暂态全响应监测系统在直流输电线路故障诊断中的应用

DOI: 10.16188/j.isa.1003-8337.2015.06.028, PP. 142-147

Keywords: 跳闸故障,雷击,行波电流,原因辨识,故障定位

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Abstract:

运行中的输电线路极易遭受各种自然因素的影响而导致跳闸故障,严重威胁电力系统的安全运行与可靠供电,其中雷害是造成输电线路跳闸故障的最主要原因。因此,准确判断输电线路雷击故障,并找出其发生的具体位置,有助于维护人员及时发现故障并制定相应的针对性措施,对输电线路安全运行具有重要意义。以国家电网500kV直流江城线雷击跳闸故障为例,介绍了雷击暂态全响应监测系统在故障定位和故障原因辨识中的应用。该系统采用分布式监测技术,依据行波电流进行精确定位,根据行波电流脉宽智能辨识故障原因,通过理论分析以及实际巡线结果论证了分布式故障监测系统的高效性、准确性。

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