利用电压测量定位配电馈线上的单线对地故障

R. Pereira, L. da Silva, M. Kezunovic, J. Mantovani
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引用次数: 12

摘要

本文提出了一种用于配电系统单线对地故障定位的专用算法。该算法采用变电站电压相和电流相量、支线部分母线电压量值、配电网络电气、运行和拓扑参数数据库以及故障仿真。电压测量可以使用已经安装在馈线上的电能质量设备或使用专用的故障定位电压测量设备来获得。利用所提出的算法,从结果中排除了地理上远离实际故障点的支线上的可能故障点。以238辆客车的实际馈线为例,对算法的效率进行了评价。结果表明,该算法具有较强的鲁棒性,能够快速、有效地定位需要电压测量装置覆盖小于5%接线母线的持续单线对地故障
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Location of Single Line-to-Ground Faults on Distribution Feeders Using Voltage Measurements
This paper proposes a dedicated algorithm for location of single line-to-ground faults in distribution systems. The proposed algorithm uses voltage and current phasors measured at the substation level, voltage magnitudes measured at some buses of the feeder, a database containing electrical, operational and topological parameters of the distribution networks, and fault simulation. Voltage measurements can be obtained using power quality devices already installed on the feeders or using voltage measurement devices dedicated for fault location. Using the proposed algorithm, likely faulted points that are located on feeder laterals geographically far from the actual faulted point are excluded from the results. Assessment of the algorithm efficiency was carried out using a 238 buses real-life distribution feeder. The results show that the proposed algorithm is robust for performing fast and efficient fault location for sustained single line-to-ground faults requiring less than 5% of the feeder buses to be covered by voltage measurement devices
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