发电机低励失磁故障事件分析  

Analysis on Low Excitation Loss Fault of Generator

作　　者：赵曙伟[1] ZHAO Shuwei(Suzhou Nuclear Power Research Institute,Shenzhen,Guangdong 518120,China)

机构地区：[1]苏州热工研究院有限公司,广东深圳518120

出　　处：《广东电力》2018年第3期80-85,共6页Guangdong Electric Power

摘　　要：针对一起由于设备发生异常引起发电机励磁系统失去输入电源,最终导致发电机跳闸的事件,利用继电保护装置和故障录波器记录的信息,结合保护原理和保护逻辑,采用对各元件动作时刻数据进行计算验证的方法,分析低励失磁保护启动和出口的正确性。再根据励磁调节器的自动调节和限制器原理,分析P/Q限制器和低励失磁保护返回的动作行为。最后通过梳理各元件动作行为的时序关系,验证了继电保护和自动装置之间配合关系的正确性。In allusion an event of generator tripping caused by abnormality of the equipment resulting in the generator excitation system losing power source,this paper analyzes correctioness of low excitation loss protection startup and output by using recorded information of the relay protection device and the fault recorder,combining protection principles and logics and adopting a method for calculation verification for data at action time of each element.According to principles of automatic adjustment of the excitation adjustor and the limiter,it analyzes action of the P/Q limiter and low excitation loss protection return.Finally,by sorting out time sequence relationships between action of each element,it verifies correctness of cooperative relationship between the relay protection device and the automatic device.

关 键 词：发电机 低励失磁 励磁 P/Q限制 P/Q保护 逆功率 

分 类 号：TM77[电气工程—电力系统及自动化]