励磁同步信号断线保护装置的设计及试验  

Design and Test of Protection Device for Disconnection of Synchronous Signal in Excitation System

作　　者：王波 余翔 陈小明[3] 孔丽君 胡伟 WANG Bo;YU Xiang;CHEN Xiaoming;KONG Lijun;HU Wei(Xiangjiaba Hydraulic Power Plant,Yibin 644600,China;Three Gorges Nengshida Electric Co.,Ltd.,Wuhan 430070,China;China Yangtze Power Co.,Ltd.,Yichang 443002,China)

机构地区：[1]长江电力向家坝水力发电厂,四川宜宾644600 [2]长江三峡能事达电气股份有限公司,武汉430070 [3]中国长江电力股份有限公司,湖北宜昌443002

出　　处：《大电机技术》2019年第5期81-84,共4页Large Electric Machine and Hydraulic Turbine

摘　　要：本文介绍了一种励磁同步断线保护装置,此装置监视接入励磁调节器的2路电压同步信号,通过检测同步电压三相幅值判断同步断线,当出现同步断线时调节器进行通道切换,保证励磁系统可靠运行。此装置也可检测同步电压相位,判断是否出现逆序,在起励阶段判断同步电压逆序故障可以防止发电机出现空载过压。This paper introduces a protection device for disconnection of synchronous signal in excitation system,which monitors the 2-way synchronous voltage signal connected to the excitation regulator.By detecting the three-phase amplitude of the synchronous voltage,the synchronous disconnection can be judged.When the synchronous disconnection occurs,the regulator switches channels to ensure the reliable operation of the excitation system.The device can also detect the phase of synchronous voltage and judge whether the reverse sequence occurs,which can prevent the generator from no-load overvoltage.

关 键 词：同步发电机 励磁控制系统 同步断线 逆序判断 

分 类 号：TM571[电气工程—电器]