高压电机差动保护原理及误动作故障分析

Analysis on the Differential Protection Principle and Mis-Operation Fault of High Voltage Motor

电机差动保护是保护电机绕组故障的,是保护大型电机内部故障的主保护,一般动作于跳闸。差动保护主要用在大型高压电动机,如果发生严重故障导致电机烧毁,将严重影响生产的正常进行,造成巨大的经济损失,因此必须对其提供完善的保护。

The motor differential protection is to protect the motor winding fault, is thethe main protection of largemotor internal fault, and usually acts in the trip. Differential protection is mainly used in the large high voltage motor,if there is a serious fault which burns down the motor, it will seriously affect the normal production and cause hugeeconomic loss, therefore we must provide perfect protection.