高压电动机的断相故障分析与保护配置

Analysis and protection configuration for the phase failure of the HV motor

分析了高压电动机断相故障特征和现有负序电流保护的不足 ,基于对称分量法进行了高压电动机断相时的最小负序电流的计算 。

The phase faults character and insufficiency of the existing negative_sequence current protection for the high_voltage motors are analyzed in this paper .Based on the symmetry component theory,a calculation method of the minimum negative_sequence current and a new negative_sequence current protection for the phase_failure of the HV motor are presented.