Novel control method for DC microgrid based on hybrid renewable power sources with multiport DC to DC converter

Power supply systems built upon multiple renewable energy sources can provide reliable power. By using an efficient control method along with suitable converters can improve the power quality as well as can able to supply stable power to various loads. Multiple renewable sources connected DC-Microgrid is becoming popular and required an efficient control method to make both energy management as well as maintaining power quality at load bus. Since many renewable energy-based power generating units, battery bank and loads are connected, a multiport DC to DC converter is selected in this paper. Solar plant, wind power plant, hydrogen-based power units (AE and FC) and battery bank are connected to a common DC bus. A novel control unit is developed in this paper on multiport DC to DC circuit to maintain both energy management system as well as constant voltage at DC bus. Super twisting sliding mode controllers are used in the proposed control methodology to improve the performance of proposed system under rapid changes in the system including wind speed, solar irradiance and load current. Hardware — in the — Loop is developed by using OPAL-RT modules to present various results under different operating conditions.