三相电能计量装置V/V接线方式的分析

Three-phase V /V Connection Mode Analysis of Electric Energy Metering Device

详细分析了三相电能计量装置通常采用的V/V接线方式,其作用在电能表每一个计量元件上的线电压与相电流不能够直观地反映出每相用电负荷实际运行情况。针对V/V接线方式的不足,提出了V/V-Yo接线方式。与V/V接线方式相比较,V/V-Yo接线方式只要相电压与电流对应准确就不会出现错误接线,且可直接采集到每相的相电压、电流、功率因数等参数。

This paper analyzed the V/V connection mode of three-phase electric energy metering device.and the line voltage and phase current of each measuring element in watt-hour meter would not be able to intuitively reflect the aetual operation situation. Aiming at the disadvantage of V/V connection mode, the V/V-Y0 connection mode was put forward. Compared with V/V comaection mode,the V/V-Y0 connection mode would not have the wrong wiring if only the corresponding phase voltage and current are accurate, and each phase voltage,current, power factor and other parameters can be directly collected.