小电流接地系统故障选线的一种新方法

A New Method of Faulty Line Selection for Small Current Neural Grounded System

小电流接地系统的故障选线一直备受供电部门关注。分析了中性点不接地系统单相接地故障及其选线存在的问题,并在此基础上提出了一种新的选线方案,即基于TVS的可控短路方案。利用MATLAB/Simulink进行仿真,结果表明该方法不仅能够弥补传统选线法的不足,而且具有一定的优势。

Faulty Line Selection tor small current neural grounded system in distribution network is always paid attention. The characteristic of single-phase grounded fault in ungrounded systems is analyzed, meanwhile the problems of faulty line selection are pointed out. A new scheme that is controllable short-circuits based on TVS is proposed in this paper. The simulations in MATLAB/ Simulink prove that the method can make up the defects of the general faulty line selection.