Renewable Power Smoothing of a Hybrid System Utilizing Fuzzy Based Control of Battery Energy Storage

Because of the fluctuating and intermittency characteristic of speed of wind and irradiation of solar, a hybrid system’s output power consisting of wind and solar photovoltaic (PV) fluctuates. These changes degrade power quality, causing oscillations in grid voltage and frequency. Integrating battery energy storage systems with wind and PV systems is one technique for mitigating these issues. By smoothing the fluctuating output power, this hybrid system could provide a flexible energy management solution. This research presents a fuzzy logic control (FLC) strategy aimed at smoothing the fluctuating output power by constantly altering the battery’s state of charge and the wind turbine’s blade pitch angle. The method was tested for different battery initial charge states, showing that the proposed method significantly reduced power fluctuations. Therefore, it indirectly improves the quality of the output power from the unsteady wind and solar sources.