Universal instantaneous power theory for DC, single-phase AC sinusoidal and nonsinusoidal circuits

A novel power component theory based on instantaneous power concept for single-phase AC circuits is proposed in this paper. Every kind of power component advanced here is concerned directly with the instantaneous power process in circuits and possesses clear physical meaning. This new power component definition theory is immediately suited to DC, single-phase AC sinusoidal and nonsinusoidal circuits at the same time, and it may be easily utilized in three-phase power systems, too, so it is named “universal instantaneous power theory”. Besides, this electric power theory can be applied to the obtainment of the current reference signal for active power filters, and it is useful for the design and for the choice of nonactive power (e.g. the total instantaneous AC reactive power and the total instantaneous nonlinear power) compensators and filters