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An Initial Investigation for Locating Self-Clearing Faults in Distribution Systems

机译：定位配电系统自清除故障的初步研究

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摘要

An approach of inverse time-domain transient analysis is devised as a possible method of locating self-clearing, sub-cycle incipient faults in distribution systems. Simplified modeling and formulation of a fault distance calculation from a substation for ground faults in circuits is made using only the discrete voltage and current samples obtained at the substation. The formula in principle seeks to find the value of a line inductance to the fault from the substation by analyzing the transient waveform of phase voltage and current. In particular, in the equivalent circuit of the faulted system, the method applies voltage injection and superposition principle, obtains net fault voltage and current, and calculates the line inductance to the fault as fault distance. The steps for implementing the formula from substation sampled data are detailed and illustrated, followed by validation test results with eleven actual transient faults.
机译：提出了一种时域逆向瞬态分析的方法，作为定位配电系统中自清除子循环初期故障的一种可能方法。仅使用在变电站中获得的离散电压和电流样本，即可对电路中的接地故障进行变电站的故障距离计算的简化建模和公式化。该公式原则上旨在通过分析相电压和电流的瞬态波形来找到变电站的线路电感值。特别地，在故障系统的等效电路中，该方法应用电压注入和叠加原理，获得净故障电压和电流，并将故障的线路电感计算为故障距离。详细描述了从变电站采样数据中实现公式的步骤，然后给出了具有11个实际瞬态故障的验证测试结果。

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