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Comparative analysis of PI and PR based Current Controllers for Grid Connected Photovoltaic Micro-inverters

this paper presents a comparison between Proportional Integral (PI) and Proportional Resonant (PR) current controllers used in Single-phase Grid Connected Photovoltaic (PV) Inverters.The reference tracking with steady-state errors is enhanced with the second solution.The simulation results of the system shows that the PR controller with modified compensator has a good transient response compared to the conventional PI controller