Fryze - Buchholz - Depenbrock: A time-domain power theory

Several power theories trying to explain the difference between the physically defined active power and the apparent power are known - and under discussion. This paper gives an overview of a universal time-domain power theory mainly developed by Fryze, Buchholz and Depenbrock. It is verified by theoretical considerations and explained by examples. The theory allows the assessment of loads concerning effectivity of energy transfer and the application-specific splitting of currents into desirable and undesirable components - which in turn can, e.g., be compensated.