Instantaneous active power p, q-axis instantaneous reactive power q, and r-axis instantaneous reactive power q, have been defined as linearly independent of each others in the time domain in three-phase four-wire systems with the use of p-q-r theory. This paper renames the instantaneous active/reactive powers as instantaneous real/imaginary powers to distinguish them from the traditional definition of active/reactive powers. The instantaneous real/imaginary powers are analyzed at various circuit conditions in single-phase and three-phase systems. The q-axis instantaneous imaginary power q/sub q/, is orthogonal to the other two instantaneous powers p and q,. in the frequency domain. By analyzing the spectral distribution of the instantaneous powers p, q/sub q/, q, this paper proposes unified definitions for some power quality factors which can evaluate and identify the various circuit conditions both for single-phase and three-phase systems.
展开▼
机译：使用p-q-r理论，在三相四线系统中，瞬时有功功率p，q轴瞬时无功功率q和r轴瞬时无功功率q在时域中被定义为彼此线性独立。本文将瞬时有功/无功功率重命名为瞬时有功/虚功率，以区别于传统的有功/无功功率定义。在单相和三相系统的各种电路条件下，分析瞬时有功/虚功率。 q轴瞬时虚功率q / sub q /与其他两个瞬时功率p和q正交。在频域中。通过分析瞬时功率p，q / sub q /，q的频谱分布，本文提出了一些电能质量因数的统一定义，这些因数可以评估和识别单相和三相系统的各种电路条件。
展开▼
