牵引变压器功率测量误差分析  

Error analysis of traction transformer power measurement

作　　者：姜惠英[1] 许建安[1] 徐木政[1] 

机构地区：[1]福建水利电力职业技术学院,福建永安366000

出　　处：《电测与仪表》2015年第18期108-112,共5页Electrical Measurement & Instrumentation

基　　金：福建省教育厅中青年教师教育科研项目(JB14158)

摘　　要：分析了斯科特接线、Y/V接线平衡变压器无功功率,有功与无功功率测量的误差。当牵引变压器二次负荷不平衡时,无论在一次侧或二次侧测量无功功率均存在误差;斯科特变压器当二次不平衡时,一次侧测量有功功率也有误差。通过理论计算和数字仿真,得到了在低压侧测量无功结果较实际值偏大及一次侧测量有功功率偏小的结论。This article analyzes the Scott connection , Y/V connected balance transformer reactive power , and active and reactive power measurement error .When the secondary load of the traction transformer is out of balance , there exists errors in the measurement of one side or two sides reactive power;when the Scott transformer is unbalanced for the second time , errors in one side active power measurement also exist .Thus it come to a conclusion by means of the theoretical calculation and numerical simulation that in the low-voltage side of the measurement without power was lar-ger than actual value and one side active power measurement is small .

关 键 词：负序 阻抗匹配 电压平衡 无功测量 误差分析 

分 类 号：TM922[电气工程—电力电子与电力传动]