Power management, dynamic modeling and control of wind/FC/battery-bank based hybrid power generation system for stand-alone application

This paper proposes a novel approach for power management and control strategy of a wind/fuel cell/battery-bank hybrid power generation system. This system consists of a wind turbine (WT), a proton exchange membrane fuel cell (PEMFC), battery bank, electrolyzer and different converters. In order to solve the problem of intermittent power generation, a wind power system is combined with fuel cell (FC) due to its high efficiency, modularity and fuel flexibility. To alleviate slow dynamics of FC, a battery-bank is used to provide excess power to satisfy load demand above the maximum power available from FC and WT systems for long or short duration. This system is managed by a coordination control strategy base on the dynamic behavior of FC to prevent fuel starvation. Furthermore, it tolerates rapid changes in wind speed or load demand. In wind turbine, a comprehensive torque model for three-bladed WT including effects of wind shear and tower shadow is presented. Simulation results with MATLAB have been presented to verify the mathematical analysis and dynamic modeling of the proposed system. Copyright (C) 2011 John Wiley & Sons, Ltd.