配电系统用接地变压器的论证

Discussion on the Grounding Transformer Application in Distribution System

配电系统的10(6)kV变压器通常是三角形接线,无中性点,通过分析电网在发生单相接地故障时的电流分布,得出装设接地变压器进行中性点经消弧线圈(或小电阻)接地的必要性,并简单介绍了接地变压器结构和容量的选择方法。

Usually, 10（6）kV transformer in distribution system is triangular wiring, there are not neutral point, by analyzing the current distribution when single phase earth fault of power grid, come to the necessity of install grounding transformer neutral through Petersen coil （or low resistance）for grounding, and summarizes the way of selecting structure and capacity selection for the grounding transformer.