发电机失磁保护阻抗元件定值整定的再讨论——对2007年版《IEEE Guide for AC Generator Protection》的斟酌  

Re-discussion of setting calculation for impedance element of generator loss-of-excitation protection:thinking of IEEE Guide for AC Generator Protection 2007

作　　者：王维俭[1] 桂林[1] 王雷[2] 王立群[2] 唐渝南[2] 

机构地区：[1]清华大学电机工程与应用电子技术系,北京100084 [2]上海外高桥第三发电有限责任公司,上海200137

出　　处：《电力自动化设备》2009年第12期1-3,共3页Electric Power Automation Equipment

摘　　要：发电机失磁保护阻抗元件定值整定中,始终存在防误动和加速动作的矛盾。根据理论分析和运行实践,认为解决矛盾应从阻抗平面的R轴方向扩大阻抗动作区,即将理论上的汽轮发电机静稳边界功角90°,减小为实用的静稳边界功角55°～65°,与此同时,增设无功反向元件。从-X轴方向扩大动作区,以求加速失磁保护动作的做法,缺乏理论依据且欠有实效。There is always contradiction between mis-operation and acceleration in the setting calculation of impedance element for generator loss-of-excitation protection. According to theoretical analysis and operation practice, the way to solve it is the extension of operational area along R axis in impedance plane,i.e, the decrease of steadystate stability limiting power angle from 90° （theoretic） to 55°-65°（practical） and the addition of a reverse reactive power element at the same time. The way of extension of operational area along -X axis to accelerate the impedance element is theoretically ineffective and practically infeasible.

关 键 词：发电机 失磁保护 阻抗元件 定值整定 无功反向元件 

分 类 号：TM74[电气工程—电力系统及自动化]