电压互感器更换后主变变损增大问题分析  

Analysis of the Main Transformer Loss Increase after VT Replacement

作　　者：孙建鹏[1] 韩文花[1] 

机构地区：[1]上海电力学院电力与自动化工程学院,上海200090

出　　处：《华东电力》2011年第2期253-256,共4页East China Electric Power

基　　金：上海市教育委员会重点学科建设资助项目(J51301);上海市教委科研创新项目(09YZ340)~~

摘　　要：针对某电厂更换上、下母电压互感器后,主变变损率突然增大这一问题,从变损率计算公式入手,对变损率增大的原因进行了分析。有针对性地提出了调整电压互感器误差,降低电压互感器二次负载回路电压降的解决方案,以使主变变损率降低,保障电力企业的合理经济效益。To solve the problem of the sudden increase of main transformer losses after replacement of upper and lower bus VT,this paper starts to analyze the reasons in terms of transformer loss rate calculating formula.Then it proposes a solution to adjust measurement error of VT and reduce secondary circuit voltage drop,in order to reduce the main transformer loss rate and guarantee the reasonable economic benefit of the power enterprises.

关 键 词：电压互感器 变损率 电能计量 误差 二次回路电压降 

分 类 号：TM41[电气工程—电器]