大型水轮发电机不完全差动保护的分析计算  

Calculation Analysis for Domestic Differential Protection of Large Generotors

作　　者：王维俭[1] 刘俊宏[1] 蒙宁海 

机构地区：[1]清华大学电机工程系,广西电力勘测设计院

出　　处：《中国电机工程学报》1994年第3期42-47,共6页Proceedings of the CSEE

摘　　要：本文采用多回路分析法详细计算了两台国产大型水轮发电机的内部故障电流，在此基础上首次讨论了国外某技术咨询公司为我国二滩电站机组差动保护提出的技术方案，即西屋公司在《继电保护的应用》中提出的“带有分相线圈的发电机差动保护”。经分析证明该方案虽有简单的优点，但对某些内部故障可能拒动，因此对于多分支大型水轮发电机应慎用不完全差动保护。The method of multi-loop is adopted to calculate the fault currents of domestic large generators in this paper.hased on the results of calculating,we discuss the differential protection scheme for Er Tan's generators, which is put forward by one foreign consulting company.Through analysis,we are sure that this schem has the advantage of simplicity,but for some internal faultS,it may reject to respond.So for the large generator with multi-branches,this kind of differential protection must be used with more cautions.

关 键 词：多回路法 差动保护 水轮发电机 

分 类 号：TM312.07[电气工程—电机]