配电网中性点接地方式的仿真研究

The Simulation Research on the Neutral-point Grounding Ways in the Distribution Network

世界各国对中压电网中性点接地方式的选择并不统一,对其也没有统一的定论,实际上各种接地方式都各有利弊。中压电网不断扩大的同时,系统的单相接地电流也快速增加,发生故障时送电线路和变电站事故较多。此文利用ATP仿真软件分析了各种接地方式下的基本运行特性,从而得出了以电缆为主的电网采用中性点经电阻接地方式是适合的结论。

The choice of neutral-point grounding method on MV network is not uniform in various countries,there are still different views by what kinds of grounding method,In fact,all sorts of grounding method all have their advantages and disadvantages.With expanding constantly on MV network,the current of the one-phase grounding increases constantly too,when one-phase grounding fault happens,there are more accidents in the lines and substations.In the paper,the basic operation characteristic of system are analysed by ATP software in the different of grounding method,it is well obtained that resistance grounding method is appropriate in the MV network of the cable-based.