关于大型发电机-变压器组差动保护整定计算的几点见解  

Some opinions about setting differential protection for large generator-transformer units

作　　者：王奕[1] 

机构地区：[1]广东省电力试验研究所

出　　处：《广东电力》2005年第8期22-25,共4页Guangdong Electric Power

摘　　要：以某电厂一台300 MW发电机组为例,介绍了几点关于大型发电机-变压器组差动保护整定计算的心得和见解,包括短路电流的计算方法、定值计算的标幺值算法、差动保护的保护范围和灵敏系数,以及电流互感器(TA)断线闭锁的设值等问题。This paper presents some opinions about setting differential protection for large generator-transformer units. A 300 MW generating unit is illustrated as an example. The opinions in this paper include the methods of short-circuit current calculation, per unit arithmetic, protecting zone and sensitivity, and how to set the blocking function when current transformer circuit is open.

关 键 词：发电机-变压器组 差动保护 整定计算 

分 类 号：TM77[电气工程—电力系统及自动化]