提高大型汽轮发电机匝间保护动作可靠性的探讨  

Discussion on enhancing reliability of stator winding's inter-turn S/C protection for large thermal generator

作　　者：张茂强[1] 

机构地区：[1]湛江发电厂,广东湛江524099

出　　处：《电力自动化设备》2004年第2期95-98,共4页Electric Power Automation Equipment

摘　　要：纵向零序电压式发电机匝间保护，由于动作灵敏度的要求，其动作整定值很小(2．5～3V)，受外界条件的影响较大。增加具有故障量的负序功率方向闭锁，改进电压互感器(TV)断线闭锁功能，能有效地减小该匝间保护的误动几率。In order to meet the sensitivity requirement ,the settings of the longitudinal zero - sequence - voltage inter - turn fault protection are usually quite small ( 2.5~3V ),which is much influenced by system disturbance.By adding a negative - sequence fault - power directional element and a finer TV break detection element to block the tripping at external fault ,the improper trips of the integrated protection may effectively decreased.

关 键 词：负序功率方向 电压互感器断线闭锁 匝间保护 

分 类 号：TM311[电气工程—电机] TM772