Energy Management of PV/WT/Battery Hybrid Power System Using Flatness-Based Control

This paper presents a control strategy for a renewable energy hybrid system fed by photovoltaic panels (PV) and wind turbine (WT) sources with a battery bank storage device. The PV is used as a primary main source, the WT is the second leading source to supplement and feed the insufficient power from PV, and the batteries for storing purposes in case of excess production or to compensate for the momentary lack of power during consumption peaks. The energy generated is managed through a nonlinear approach based on the flatness property, which allows the full description of the state's trajectories to improve the proposed hybrid system's dynamic response, stability, and robustness by decreasing the static error in the output regulated voltage. The simulation results support the suggested control algorithm based on the planning technique and demonstrate that it can manage the power flow in the renewable hybrid system.