基于发电机功率变化量的失磁保护辅助加速判据  

An Auxiliary Accelerated Judgment Method for Loss of Excitation Protection Based on Generator Power Variation

作　　者：李哲[1] 季学军[1] 王祖光[1] 

机构地区：[1]国网南京自动化研究院/南京南瑞集团公司,江苏省南京市210003

出　　处：《电力系统自动化》2008年第15期54-56,共3页Automation of Electric Power Systems

摘　　要：介绍了发电机失磁保护的4种主判据,针对阻抗Ⅱ段和低电压判据延时较长的不足,提出利用发电机功率变化量作为失磁保护辅助加速判据,并介绍了实际微机保护装置的动模试验情况。This paper describes four main judgment methods for the generator loss of excitation protection.Owing to too long a delay time of the impedance second zone judgment and the under-voltage judgment,an auxiliary accelerated judgment method is proposed for the loss of excitation protection based on the generator power variation.Finally,the dynamic model test on a real digital protective relay is discussed.

关 键 词：失磁保护 发电机 功率变化量 辅助加速判据 动模试验 

分 类 号：TM31[电气工程—电机]