Isolated-microgrid-based Inverter Control Strategy for Photovoltaic Arrays
In order to ensure safe,efficient and durable operation of the whole microgrid,how to accelerate charge and discharge of all vanadium redox flow cells(VFB)and to improve efficiency and cost of photovoltaic generation has always been a problem to be solved in research of microgrid system.The present study proposed variable-step-disturbance-based MPPT algorithm and SOC-based three-loop flexible charge-discharge control strategy starting from mathematically modeling photovoltaic arrays.The variable-step-disturbance-based MPPT and the SOC-based three-loop flexible charge-discharge control were proved through simulation analysis capable of quickly responding and determining arrays'maximum power point,and realizing VFBs'fast response and stable charge-discharge performance,respectively,under sudden changes in light and temperature,and thereby to have great applicative potential in improving storage capacity and service life of VFB.
vanadium redox flow batterymicrogridenergy inverter controlcharge and discharge control technology