The increased usage of nonlinear loads in electric systems has dissociated the voltage and current signals from the ideal sinusoidal form and, as a consequence, the traditional power calculation is no longer satisfactory. Several power calculation theories applied to nonsinusoidal signals have been proposed; however, there is no general agreement among them. This paper is inserted in this context, reviewing traditional and non-traditional electric power theories for three-phase four-wire systems. The power theories used in this study were the currents’ physical components power theory, the theory of instantaneous power, the Fryze–Buchholz–Depenbrock power theory, the IEEE standard 1459, and the conservative power theory. The mathematical definitions of power theories aforementioned were implemented and applied to real data. Furthermore, the effect of current decomposition based on different power theories was analyzed. The analysis of power theories indicates the particularities of its definitions and the results indicated that reactive current compensation may not minimize circuit losses significantly.

中文翻译：

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非正弦条件下电流分解对功率计算的影响

电力系统中非线性负载使用的增加已经将电压和电流信号与理想的正弦形式分离，因此传统的功率计算不再令人满意。已经提出了几种应用于非正弦信号的功率计算理论；然而，他们之间没有达成普遍共识。本文在此背景下插入，回顾了三相四线制系统的传统和非传统电力理论。本研究中使用的功率理论是电流的物理分量功率理论、瞬时功率理论、Fryze-Buchholz-Depenbrock 功率理论、IEEE 标准 1459 和保守功率理论。上述幂理论的数学定义被实施并应用于实际数据。此外，分析了基于不同功率理论的电流分解效果。功率理论的分析表明其定义的特殊性，结果表明无功电流补偿可能不会显着减少电路损耗。