非正弦条件下无功功率定义分析与展望

Analysis and Expectation for the Reactive Power Definition in Non-sinusoidal Condition

非正弦电路中,有功功率定义已被公认,无功功率的定义却一直还没有定论。本文描述了在非正弦波形下有关无功功率的三种定义,其一是时域分析法,其二是频域分析法,其三是三相电路瞬时无功功率;对已提出的一些无功功率定义做了详细的分析和评述;最后总结了新的无功功率理论应该满足的要求。

The active power definition is well accepted, but the reactive power definition is still questionable in non-sinusoidal condition. In this paper, there are three methods used to describe the reactive power definition in non-sinusoidal condition, which include time domain analysis method, the frequency domain analysis method and the instantaneous reactive power in three-phase circuits. Some reactive definitions are analyzed and studied. Also gives out a conclusion about requirements of the new reactive power definition.