PROPORTIONAL-RESONANT(PR)CONTROLLERSANDFILTERSFORGRID CONNECTEDVOLTAGE-SOURCECONVERTERS

Abstract

The recently introduced proportional-resonant (PR) controllers and filters, and their quality for current/voltage management of grid-connected converters, are represented in these paper. Victimization the PR controllers, the device reference following performance will be increased and antecedently best-known shortcomings related to standard PI controllers may be relieved. These shortcomings embody steady-state errors in single-phase systems and also the want for synchronous d–q transformation in three-phase systems. Supported similar management theory, PR filters also can be used for generating the harmonic command reference exactly in a full of life power filter, particularly for single-phase systems, wherever d–q transformation theory isn't directly applicable. Another advantage related to the PR controllers and filters is that the chance of implementing selective harmonic compensation while not requiring excessive process resources.