Concept of Real and Reactive Power

Abstract

In this chapter the meaning of “real” and “reactive” power is explored for sinusoidal systems. Initially, single phase (so-called two-wire) circuits are discussed to gain an understanding of the energy flow within a circuit configuration that is representative for electrical machines. We will then extend this analysis to three-phase (three-wire) circuits. In the final part of this chapter a set of tutorials is introduced to reinforce the concepts discussed.