Synchronized Measurements-Based Algorithm for Short Transmission Line Fault Analysis
Synchronized Measurements-Based Algorithm for Short Transmission Line Fault Analysis
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DOI：
10.1109/tsg.2015.2436878
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发表时间：
2015-06
影响因子：
9.6
通讯作者：
V. Terzija;G. Preston;V. Stanojevic;N. Elkalashy;M. Popov
中科院分区：
文献类型：
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作者：
V. Terzija;G. Preston;V. Stanojevic;N. Elkalashy;M. Popov
本文提出了一种新的数值算法，用于分析短架空输电线路上的单线接地故障。它基于两个线路端口的同步采样，以及包括故障点的电弧现象和塔基电阻在内的精确故障模型。该算法的核心是一种高效的非递归参数估计方法。故障模型中包含动态电弧模型来表示电弧与外部电网的相互作用。该算法同时准确估计电弧电压幅值、塔基电阻和故障位置。该算法是在时域中推导出来的，并且基于同步采集两个线路终端的电流和电压。基于模拟数据的案例研究证明了新方法的有效性。特别是，通过集总、分布式、转置和非转置线路模型探讨了所提出的算法对同步误差、谐波、线路电容和故障电阻的敏感性。
A new numerical algorithm for the analysis of single line to ground faults on short overhead transmission lines is presented in this paper. It is based upon synchronized sampling at two line ports, and an accurate fault model including the arcing phenomena and tower footing resistance at the fault point. The core of the algorithm is an efficient nonrecursive parameter estimation method. A dynamic arc model is included in the fault model to represent the arc's interaction with the external power network. The algorithm accurately estimates the arc voltage amplitude, tower footing resistance, and the fault location, simultaneously. The algorithm is derived in the time domain, and is based on the synchronized acquisition of currents and voltages at both line terminals. Case studies based on simulated data are presented to demonstrate the effectiveness of the new method. In particular, the sensitivity of the proposed algorithm to synchronization errors, harmonics, line capacitance, and fault resistance were explored with lumped, distributed, transposed, and untransposed line models.