Ak±1-order harmonic repetitive controller for single-phase micro-grid power converter system with nonlinear loads

Abstract

This paper proposed the repetitive controller (RC) controlled single-phase micro-grid power converter system with nonlinear load. Conventional RC (CRC) and 4k±1-order harmonic RC (4ı1 RC) added into a propositional controller are chosen as the controllers to achieve micro-grid power balance between dc-side and load, unit power factor, and zero-error grid current tracking its reference. Moreover, 4k±1 RC has faster grid current error convergence rate than CRC. Finally, a simulation example of 4k±1 RC controlled single-phase micro-grid power converter system with nonlinear load is provided to verify its effectiveness and advantageous.