大型汽轮发电机绕组同槽同相调查及保护方案定量化设计  

INVESTIGATION OF TURN-TO-TURN FAULT RATIO AND QUANTITATIVE DESIGN OF MAIN PROTECTION CONFIGURATION SCHEME FOR LARGE-SIZED TURBO-GENERATOR

作　　者：桂林[1] 王祥珩[1] 王剑[1] 孙宇光[1] 王维俭[1] 

机构地区：[1]清华大学电机系,北京市100084

出　　处：《电力系统自动化》2004年第17期75-79,共5页Automation of Electric Power Systems

摘　　要：大型汽轮发电机实际存在定子绕组匝间短路,不装设匝间短路保护是发电机安全运行的严重隐患。文中以2台300 MW汽轮发电机主保护配置方案的定量化设计为例,说明保护人员应与业主、电机制造厂家密切配合,争取汽轮发电机中性点侧引出2个中性点并装设分支电流互感器,为装设横差保护和不完全纵差保护提供可能,从而对发电机的安全运行提供高质量的保证。Owing to existence of the turn-to-turn fault of a large-sized turbo-generator stator winding in practice, harmful results will be caused without the turn-to-turn short-circuit protection in the operational mode. The turn-to-turn fault ratio of large-sized turbo-generators at home and abroad are reviewed. By the quantitative design of the main protection configuration scheme for two 300 MW turbo-generators, the necessity of leading out two neutral points and installing the branch current transformer at the neutral-point side of a turbo-generator are planned. And high quality protection performances can be supplied by the transverse differential protection and incomplete longitudinal differential protection for the large-sized turbo-generator. To implement above configurations in practice need fully efforts of relay engineers, owners and machinery workers.

关 键 词：汽轮发电机 匝间短路 横差保护 不完全纵差保护 

分 类 号：TM311[电气工程—电机] TM772