同步电机稳态不对称短路的分析

Synchronous motor steady state asymmetric short circuit analysis

采用旋转磁场原理,参考坐标设置在定子上的120坐标系统,对简化等值电路进行分析,导出了同步电机端点发生各种稳态不对称短路时各相电流和电压的解析式。并以具体实例验证,对仿真结果进行对比分析可知,单相接地短路相电流最大,它对电机的影响也最严重,故对不对称短路的研究有着现实意义。

This paper, using the principe of a rotating magnetic field, reference coordinate setting in the stator of 120 coordinate system, analyzing the simplified equivalent circuit, presented the synchronous motor end to produce all sorts of steady state asymmetric short circuit for each phase current and voltage of the analytic expression. And with specific examples, the simulation results are compared and analyzed, it is known that the one - phase ground fault current is the largest, the influence of it on the motor is the most serious, so the asymmetric short circuit research has practical significance.