Control Technologies of Grid-connected PV Micro-grid Operation Based on Vanadium Battery Energy Storage System

The typically micro-grid structure,including photovoltaic,vanadium battery(VRB) energy storage and energy management systems are established.The network operation control strategies are given based on the VRB energy storage,the VRB modeling and micro-grid control action are analyzed during grid operation of VRB energy storage system.LCL filterbased energy storage inverter control strategy using tricyclic control realize micro-grid instantaneous power adjustment capabilities.Finally,based on PSCAD/EMTDC simulation software,control strategies and the correctness of parameter selection are verified.Experimental results verify the effectiveness of the control strategy.