从时域无功理论的角度,根据理论定义分析论证Fryze时域无功与基于周期函数空间的通用无功定义对于无功计量相同和差异的原因,分析其无功电能计量统一性条件和非一致性情况.基于dSPACE平台构建电能计量实时仿真系统,进行三相四线制电路的无功计量建模和实验研究.理论分析和实验结果表明,2种功率理论的有功功率定义统一,物理意义明确;2种功率理论对于无功功率的定义适用于正弦和非正弦的情况,在对称时2种功率理论的无功功率定义一致,无功计量结果相同,而在不对称时2种无功功率定义不一致,无功计量结果不相同.经对比分析,认为基于周期函数空间的通用无功定义具有更大的优越性.%Based on the theory of time-domain reactive power,the difference between the reactive power definition in Fryze time-domain and the universal reactive power definition based on periodic function space is theoretically analyzed in respect to reactive power measurement and the coherence conditions of reactive power measurement are studied. A real-time simulation system of electrical energy measurement is constructed on dSPACE platform and the model of three-phase four-wire circuit for reactive power measurement is built and tested. Theoretical analysis and experimental results show that,with clear physical meaning,the active power definitions by two power theories are coherent;the reactive power definitions by two power theories are applicable for both sinusoidal and nonsinusoidal conditions,but only in symmetric conditions,two reactive power definitions are coherent and the measurements are same;the universal reactive power definition based on periodic function space has greater superiority.
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