正弦电路瞬时功率理论研究

针对研究近一个世纪还没有解决的瞬时无功功率界定与定义的问题，该文认为应从原始瞬时有功功率，瞬时无功功率界定来研究瞬时功率理论，首先分析了现有功率定义中存在的缺陷，系统地给出了正弦稳态电路瞬时有功电流、无功电流、瞬时有功功率、无功功率，视在功率、平均有功功率，平均无功功率和平均视在功率的定义，并且将该定义应用于正弦对称三相电路运行特性分析。

STUDY ON THEORY OF INSTANTANEOUS POWER OF SINUSOIDAL CIRCUIT

The definition of instantaneous reactive power in sinusoidal circuit is still a pending problem and should be studied further. The authors consider that the theory of instantaneous power should be studied on the basis of the original definitions of instantaneous active and reactive power. In this paper some defect of the currently used definition of power is analyzed firstly. Then the definitions of the instantaneous active and reactive current, the instantaneous active and reactive power, the instantaneous apparent power, the average active and reactive power and the average apparent power of sinusoidal circuit in steady state are systematically given out. Those definitions are used in the analysis of operation characteristics of sinusoidal symmetrical three phase circuit.