浅谈贯流式机组集电环碳刷打火及温度偏高处理  

Analysis and Treatment of Sparking and Abnormal High Temperature of the Collecting Ring in Tubular Turbine Generator Units

作　　者：冉垠康 张玉祥 RAN Yinkang;ZHANG Yuxiang(Guodian Dadu River Maintenance and Installation Co., Ltd., Leshan 614900, China)

机构地区：[1]国电大渡河检修安装有限公司,四川乐山614900

出　　处：《水电与新能源》2020年第4期23-26,共4页Hydropower and New Energy

摘　　要：针对某贯流式水电站1、2号发电机组集电环碳刷打火、集电环温度偏高甚至烧伤的现象,结合其他电站类似情况及该水电站机组的实际特殊情况,经现场检查分析碳刷打火的原因后,发现贯流式机组发电机舱湿度大,集电环冷却后形成冷凝水导致集电环锈蚀,逐步打火,高温烧蚀等恶性循环。经采取降低湿度以及进行相关科学打磨方法,将碳刷更换为新型号碳刷,目前机组运行安全、可靠。In a hydropower station with tubular turbine generator units,abnormal high temperature and sparking of the collecting ring carbon brushes are observed in the No.1 and No.2 units.Considering the actual conditions of the units and similar issues occurred in other stations,it is found that when the unit is shut down and the colleting ring cools down,condensate water appears due to the excessive humidity of the generator cabin,resulting in corrosion of the collecting ring and then sparking,abnormal high temperature and even burning damage.Thus,several treatment measures are implemented,including the reduction of the humidity of the generator cabin,proper grinding of the collecting ring surface and replacement of the carbon brushes with new type ones.After the treatment,the units now operate safely and stably.

关 键 词：发电机集电环 温度偏高 碳刷打火处理 

分 类 号：TM312[电气工程—电机]