摘要
新建变压器的差动保护投运前要用一次负荷电流来检验二次接线的正确性。受机组建设现场条件制约,目前采用的常规方法都有一定的局限性。而利用电动机启动电流检验差动保护接线的新方法,简便可靠,容易与现场安装施工进度相协调。通过在杨柳青电厂7号机建设的工程实践,验证了该方法的可行性,值得在其他机组建设中借鉴。
Before the differential protection of a newly built transformer is put into operation, primary load current must be applied to validate secondary connection. Due to conditionality in construction site, current methods have certain limitations. The new approach, which checks differential protection connection using electromotor starting current, is simple and reliable, and easy to be coordinated with installation schedule. Its feasibility has been validated through Yangliuqing Power Plant No. 7 unit project, and it is worthy of using for reference in other unit constructions.
出处
《电力建设》
2007年第9期70-72,75,共4页
Electric Power Construction
关键词
变压器
差动保护
电动机
启动电流
检验
transformer
differential protection
electromotor
starting current
test
