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针对螺电厂空投主变引起发电机差动保护误动作进行分析,说明主变空载合闸时励磁涌流对发电机差动保护的影响,以及差动保护两侧CT伏安特性不一致所带来的影响。
Aiming at the malfunction of generator differential protection caused by the main transformer in the power plant, the influence of the magnetizing inrush current on generator differential protection during the no-load closing of the main transformer and the inconsistent CT volt-ampere characteristics of the differential protection Impact.