Practical definitions for powers in systems with nonsinusoidal waveforms and unbalanced loads: A discussion

Existing definitions for power terms in alternating current systems work well for single-phase and three-phase systems where both voltages and currents are sinusoidal with respect to time. This paper clarifies and proposes definitions for power terms that are practical and effective when voltage and/or currents are distorted and/or unbalanced If also suggests definitions for measurable values that may be used to indicate the level of distortion and unbalance.