补偿电网单相接地故障的数值仿真研究

Simulation Study on Single-phase Ground Fault of Compensation Networks

本文介绍了MATLAB建立电力系统模型的方法,并利用其仿真平台,仿真某10kV电网在中性点采用经消弧线圈接地方式时各种补偿情况(过补偿、欠补偿、全补偿)下,发生单相接地故障后的中性点电压以及故障线路和非故障线路的零序电流的变化情况,指出了利用MATLAB仿真平台有助于电力系统分析应用人员形象直观地理解系统的运行特性,还可用于研究各种消弧线圈的特性及运行方式对系统的影响。

In this paper,the means to build power system model by MATLAB is intuoduced.Using the MATLAB simulation plat-form,the changes of a 10kV compensation network’s neutral point voltage and zero sequence current of the fault line and the non-fault lines are simulated in various compensating situations（overcompensated,fully-compensated,under-compensated） when single-phase falult occurs.Simulating software MATLAB can also be used to do the research on the characteristics of various extinction coil and in-fluences of operation mode to power system.