Dynamic Modeling and Closed-loop Control of Hybrid Grid-connected Renewable Energy System with Multi-input Multi-output Controller

In this study, a novel approach for dynamic modeling and closed-loop control of hybrid grid-connected renewable energy system with multi-input multi-output (MIMO) controller is proposed. The studied converter includes two parallel DC-DC boost converters, which are connected into the power grid through single-phase H-bridge inverter. proposed MIMO developed maximum point tracking photovoltaic (PV)/fuel-cell (FC) input sources output DC-AC Considering circuit topology system, unique model analysis entire system. A all state variables in converters. fact, from viewpoint design, an inputs duty cycles converters amplitude modulation index inverters. Furthermore, outputs PV/FC as well AC injected grid. After development decoupling network introduced input-output linearization due to inherent connection inputs. decoupled small signal linearization, required linear controllers designed adjust outputs. Finally, evaluate accuracy effectiveness controllers, based simulated using MATLAB/Simulink toolbox.