This paper proposes new analytical and optimal design procedures of the proportionalresonant
(PR) controller and its harmonic compensators (HCs) for three-phase gridconnected
voltage source inverters (VSIs) powered by renewable energy resources. The
modeling and analysis based on stationary reference frame are performed for VSIs collaborated
with an L-type filter. The theoretical verification and simulation validation of the
proposed design guidelines are done to approve its effectiveness and robustness. Particle
swarm, grey wolf and Harris hawks’ optimization techniques are applied and compared
for a proper selection of the parameters of the proposed PR controller and its HCs. To
accomplish this study, multi-objective error functions are employed and compared to minimize
the total harmonic distortion of the grid output current. The proposed PR controller
and its HCs are tested, using MATLAB/Simulink, along with the allowable changes
of inverter output active and reactive powers, and also under the grid voltage distortion.
Moreover, their performance is evaluated according to IEEE and IEC harmonics standards,
and compared with the conventional PI controller based on reference frame. Furthermore,
the experimental validation for the proposed controllers is done based on the
hardware-in-the-loop real-time simulator using C2000TM-microcontroller-LaunchPadXLTMS320F28377S
kit.