小电流接地系统单相接地故障选线的算法探讨

通过对现有选线方法的分析及选线系统面临问题的探讨,提出采用改进的Prony算法提取故障零序电流的谐波分量,通过比较谐波分量的幅值和相位选出故障线路.实验结果表明,该方法可以准确的实现小电流接地系统单相接地故障的选线,并且无需区分暂态和稳态过程.

The Faulted Line Selecting Algorithm Research for Single-Phase-to-Earth Fault in the Small Current Neutral Grounding Power System

Through analysis of existing line selection methods and discussing problems which are line selection system faced with,the improved Prony algorithm is adopted to extract the information about harmonic components of fault zero sequence current, then the fault line could be selected by comparing the harmonic amplitude and phase of components elected fault lines.The experimental result shows that this method can select the fault line exactly,and transient state and steady state processes didn't be required.