发电机组变频传动给水泵差动保护改造的实践  

Transformation for Differential Protection of Feed Pump with Frequency Conversion Transmission

作　　者：李宝华 邹连珂 杨曙东[1] 高强[1] 王盟 LI Baohua;ZOU Lianke;YANG Shudong;GAO Qiang;WANG Meng(Shandong Taishan Iron and Steel Group Co.,Ltd.,Jinan 271100,China)

机构地区：[1]山东泰山钢铁集团有限公司,山东济南271100

出　　处：《山东冶金》2023年第1期60-61,共2页Shandong Metallurgy

摘　　要：针对65 MW发电机组2000 kW变频传动给水泵运行差流过大,差动电流保护无法投入运行的现象,从保护原理上进行分析,发现原设计的保护设备配置存在错误。通过改变电流互感器的安装位置,更改二次接线,实现了一次、二次设备相序与相位的正确匹配,消除了差流,达到了安全运行要求。For 2000 kW variable frequency driving feed water pump of 65 MW generator to run through the large,the phenomenon of differential current protection cannot be put into operation,were analyzed from the protection principle,found that the original design of the protection device configuration errors,by changing the installation position of current transformer,secondary wiring changes,phase sequence of primary and secondary equipments can be realized with the correct phase matching,The differential flow is eliminated and the safe operation is achieved.

关 键 词：发电机组 变频传动给水泵 电流互感器 差流 

分 类 号：TM773[电气工程—电力系统及自动化]