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首页> 外文期刊>Electric Power Components and Systems >Accurate Transmission Line Fault Location Considering Shunt Capacitances Without Utilizing Line Parameters
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Accurate Transmission Line Fault Location Considering Shunt Capacitances Without Utilizing Line Parameters

机译：在不利用线路参数的情况下考虑并联电容的精确传输线故障定位

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摘要

This article describes a novel and accurate algorithm to determine the fault location on power transmission lines without requiring line parameters. Voltage and current measurements at the two ends of the transmission line during the fault are utilized for fault location, and no pre-fault data are needed. In the past, a two-terminal method has been proposed based on a simplified transmission line model with no shunt capacitances. This article presents a new and accurate method considering line shunt capacitances for unbalanced faults. In deriving the unknown fault location, the line parameters, including series impedance and shunt capacitance, are treated as unknown variables as well. Approaches based on both synchronized and unsynchronized measurements are described. Since there is not enough information in three-phase balanced fault cases, shunt capacitances are not considered for balanced faults; however, the method for balanced faults still proves to be quite accurate. The chief merit of the algorithm is that only voltage and current measurements during the fault are required, and there is no need to worry about line parameters in order to pinpoint the fault location. Evaluation studies based on simulated data have indicated that the new approaches yield quite accurate results.
机译：本文介绍了一种新颖且准确的算法，无需线路参数即可确定输电线路上的故障位置。在故障期间，使用传输线两端的电压和电流测量值来进行故障定位，并且不需要故障前数据。过去，已经提出了一种基于简化的传输线模型而没有分流电容的两端方法。本文提出了一种新的，准确的方法，该方法考虑了针对不平衡故障的线路并联电容。在推导未知故障位置时，还将包括串联阻抗和并联电容在内的线路参数也视为未知变量。描述了基于同步和非同步测量的方法。由于在三相平衡故障情况下没有足够的信息，因此在平衡故障中不考虑并联电容。然而，平衡故障的方法仍然被证明是非常准确的。该算法的主要优点是仅需要在故障期间进行电压和电流测量，并且无需担心线路参数即可确定故障位置。基于模拟数据的评估研究表明，新方法产生了相当准确的结果。

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