Control of a Voltage Source Inverter in a Microgrid Architecture using PI and PR Controllers

This paper presents a voltage control of a three-phase inverter operating in stand-alone mode using proportional-integral (PI) and proportional-resonant (PR) controllers. The aim of this paper is to present a comparative study between these two controller types. The voltage and the current control loops, as well as the VSI's mathematical model, are presented in the dq and the αβ frames. The evaluation of the PI and PR controllers is discussed. The simulations study is caring out using PSIM software. The simulation results have shown the advantages of the PR controller and PI controller based in terms of total harmonic distortion (THD) reduction.