失磁保护在发电机出现逆功率时的动作分析

Operation analysis of field-loss protection when reverse-power starts in the generator

叙述了发电机UL-P失磁保护以及阻抗失磁保护的基本原理,并分析了发电机出现逆功率时失磁保护动作情况。同时结合失磁保护各种跳闸方案,论述UL-P原理失磁保护在发电机出现逆功率时应解决的问题。

This paper presents the basic principles of UL-P type and impedance-type field-loss protection, and analyzes the operation of field-loss protection when the reverse-power starts in the generator. According to all kinds of tripping schemes of the UL-P type field-loss protection, this paper discusses the problems should be resolved on the field-loss protection when the reverse-power starts in the generator. 