三相不对称负荷功率测量误差校正方案  

The Error Correction Scheme of the Measurement of the Three-phase Asymmetric Load Power

作　　者：殷家敏[1] 

机构地区：[1]湖北工业大学电气与电子工程学院,湖北武汉430068

出　　处：《重庆电力高等专科学校学报》2011年第6期62-64,共3页Journal of Chongqing Electric Power College

摘　　要：为提高功率测量的精度,针对三相负荷不对称时,三表法测量三相四线制电路有功功率存在测量误差的问题,提出从检测负荷虚拟中性点电压出发,将三相不对称负荷电路转化为三个单相电路,按照单相电路功率计量方法来计量各独立相负荷功率的方案。In the case of the three-phase asymmetric load,the three-ammeter method in the measurement of the active power of the three-phase and four-wire circuit will cause the measurement error.In order to improve the accuracy of the power measurement,this essay suggests starting with the detection of the virtual neutral-point voltage,changing the three-asymmetric load circuit into three one-phase circuits,and measuring the load power of each phase by using the method used in power measurement of the single-phase circuit.

关 键 词：三相不对称负荷 功率测量 误差校正 虚拟中性点电压 

分 类 号：TM714[电气工程—电力系统及自动化]