Dual Active Bridge Converter Based Battery Charger in Stand-Alone Wind Power Generation System With High-Inertia Wind Turbine

This paper deals with a dual active bridge (DAB) converter based battery charger in a stand-alone wind power generation system (WPGS) with a high -inertia wind turbine. The previous proposed system needs four converters from the generator to the AC load. This proposed system used three converters from the generator to the AC load. Thus, the power conversion efficiency can be improved. The DAB converter performs as battery controller. When the generated power is larger than the consumed power of the AC load, the DAB converter acts battery charging mode. On the other hand, when the generated power is smaller than the consumed power of the AC load, the DAB converter acts battery discharging mode. Simulation results demonstrate that the proposed system can control the power flow in the stand-alone WPGS.