三相同步电动机定子接地故障分析

Analyses on Stator Earthing Fault of Three-phase Synchronous Motor

通过直接相量法建立了三相同步电动机定子绕组接地故障的数学模型。以一台三相同步电动机为例,运用Ansoft语言的RMxprt/Maxwell 2D模块建立了仿真模型,仿真了三相同步电动机的突然单相接地、两相接地、三相接地故障情况,分别给出了三种故障的定子电流与转矩曲线,并对结果进行了分析。

Mathematical models of stator winding earthing fault of three synchronous motor is established by direct phasor method. Taking a three-phase synchronous motor as an example, simulation model is established by RMxprt/Maxwell 2D module of Ansoft language. Simulation has been performed when single-phase earthing fault, two-phase earthing and three-phase earthing fault suddenly occur. Stator current and torque curves of the three kinds of faults are showed separately, and the result is also analyzed.