6000kW发电机低励失磁保护频繁误动的原因分析  

Analysis for the Miss Action of 6 000 kW Generator Frequent Protection Resulting from Low or Lost Excitation

作　　者：宋晓昱 

机构地区：[1]中国石油大庆炼化公司

出　　处：《上海电器技术》2007年第1期29-31,45,共4页Shanghai Electric Appliance Technology

摘　　要：对中国石油大庆炼化公司动力站2号发电机保护和励磁系统升级改造投运后频繁造成低励失磁保护误动进行了理论分析。通过对发电机解列进行故障处理，将电流保护二次回路的互感器首尾对调，使频繁发生的低励失磁保护误动得以消除。Regarding to the changed and upgraded the protection and excitation system of the No.2 generator in the power station of PetroChina Daqing Refining ＆ Petrochemical Company, this paper theoretically analyze the miss action of the the frequent protection resulting from low or lost excitation of the No. 2 generator, and their improvement solutions are presented.

关 键 词：发电机 保护 误动 阻抗圆 接线错误 

分 类 号：TM772[电气工程—电力系统及自动化]