与系统连接紧密的水轮发电机失磁保护动作判据选择探讨  

Study on Selection of Loss-excitation Protection Action Basis of Unit Closely Connected to System

作　　者：张方庆 李敏 张成峰 

机构地区：[1]湖南潇湘水电站,湖南省永州市425000

出　　处：《西北水电》2018年第1期77-80,共4页Northwest Hydropower

摘　　要：与系统连接越紧密的水轮发电机,对系统中的故障反应越敏感,相关继电保护装置经常性启动,特别是阻抗型保护装置容易引起误动作。通过分析湖南潇湘水电站1号发电机失磁保护多次因系统波动而误动的原因,选择合理的失磁保护动作判据,在满足继电保护选择性、速动性、灵敏性、可靠性要求的基础上,达到了较为满意的效果。The unit closely connected to the system is sensitive to failure in the system. The relevant relay protection devices often start. Especially the impedance protection devices easily malfunction. Through analysis on causes for malfunction, because of the system fluctu- ation, of the loss-excitation protection of Unit 1, Xiaoxiang Hydropower Station, the reasonable loss-excitation action basis is selected. Under conditions of satisfying requirements of selection, quick-action ability, sensitivity and reliability of the relay protection, the satis- fied result is achieved.

关 键 词：水轮发电机 失磁保护 误动作 保护动作判据 

分 类 号：TM77[电气工程—电力系统及自动化]