Currently accepted definitions of power components are reviewed, and their disadvantages are analysed. New definitions of active, distortion, and apparent-power are discussed. It is attempted to find a clear physical interpretation, and to formulate this for each power in systems with sinusoidal and/or nonsinusoidal voltage and current. Formulas for the straightforward calculation of each power component are obtained. It is shown that (a) distortion power, as defined here consists of both active and reactive terms (b) apparent power in a system must be represented as a manydimensional vector, and not as a vector of dimensions as is generally accepted today. Examples are given to illustrate the application of the developed theory.
- Power systems and plant