电气系统功率理论的发展与面临的挑战

Development and Challenges of Power Theory in Electrical Power System

人们已经认识到,在非正弦条件下传统的功率理论不再适用,为此,不断有学者提出新的功率理论,然而在数学和物理上获得统一的解释和应用难度很大,至今在许多方面难以达成共识。本文首先对电路功率理论的发展脉络进行了梳理,然后,以功率理论的核心问题——功率定义为主线,分析了功率理论的基本要素,通过对几种代表性学说的介绍和阐述,指出了当前功率理论争论的焦点与面临的挑战,最后给出作者的认识和观点,以求引起读者的思考与讨论。

It is recognized that the traditional power theory is no longer applicable under the non-sinusoidal situations. Many proposals of power theory and many suggested definitions of power properties（power phenomena） exist in the scientific literature.However, a common understanding hasn＇t been reached on the interpretation and application both in mathematics and physics. In this paper, the historic development of power theories is summarized, and some definitions of power elements, which are the basis core issues of power theory, are comparably analyzed. With elaborating several representative theories, the contentions and challenges are discussed. Finally, the paper summarizes the author＇s understanding and perspectives in order to arouse the reader＇s thinking and discussion.