RESONANT CONTROLLERS FOR GRID CONNECTED VOLTAGE SOURCE INVERTER

Abstract- The introduction of proportional-resonant (PR) controllers and their quality for current/voltage controller of gridconnected converters, are represented in this article. Victimization the Proportional resonant controllers, the device reference following performance will be increased and antecedently best-known shortcomings related to standard PI controllers can be relieved. These shortcomings embody steady-state errors in single-phase systems and also it want for synchronous direct– qudrature transform in the three-phase systems. And supported similar management theory, Proportional resonant 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 direct– qudrature transformation theory is not directly applicable. Another most important advantage related to the PR controllers is that the chance of implementing selective harmonic compensation while not requiring excessive process resources. Keywords –Resonant controllers (RC), grid-connected (GC) voltage-source converters (VSC) etc