A detailed instantaneous harmonic and reactive compensation analysis of three-phase AC/DC converters, in abc and /spl alpha//spl beta/ coordinates

This paper presents a digital shula active filter, in which the instantaneous harmo reactive compensating currents are desegregated in their different ap space- trajectories, and in their time-domain waveforms of both the abc and the aP system of coordinates. Departing from Akagiʹs generalized instantaneous reactive power theory, a complete analysis is presented, in which the counterharmonic compensating current injected to the coupling point of the AC mains feeding a six-pulse-controlled three phase AC/DC converter is desegregated in its three components, namely, (a) fundamental reactive current, (b) oscillating harmonic reactive current and (c) oscillating harmonic active current. It is demonstrated, in a selected number of abc and ap oscillograms, and current-space-trajectories that the active filter can compensate either separately or jointly the above mentioned currents.