Design and evaluation of power converter for integration of lithium-ion battery and renewable sources

• This study evaluates the Design of Power Converter for integration of Lithium-ion Battery and Renewable Sources. • The proposed converter integrates photovoltaic (PV), wind, battery, and the fourth port designated for the load. • The bidirectional port in the battery storage system allows charging and discharging, enhancing power supply reliability and stability. • The converter's adaptability is shown by its ability to handle multiple inputs and enable bidirectional energy flow for various needs. • The analysis evaluates system performance across three regions based on the availability of solar and wind resources. The article introduces an innovative four-port DC-DC boost converter designed for DC microgrids, which incorporate renewable energy sources and lithium-ion storage. Integrating multiple renewable sources into a DC microgrid presents significant challenges for researchers in the field of green energy. The proposed converter features two unidirectional ports for connecting renewable energy inputs and one bidirectional port for lithium-ion battery storage. It enables the connection of both photovoltaic (solar) and wind energy systems, which not only support the DC microgrid but also allow for independent charging of the battery, depending on load demand and energy generation. Even if one or both energy sources are unavailable, the converter ensures continuous DC power supply to the DC bus. The control system utilizes the duty cycle to track the input source's maximum power. The considered input sources of PV and WECS are 600 W and 700 W and the battery voltage is 24 V. The performance is investigated in three different regions, based on the consideration of available sources, and the obtained results are presented. The proposed converter efficiency and the regulating system are tested using MATLAB/Simulink software for different operating conditions.