Design Of Monitoring System For All Vanadium Redox Flow Battery

Renewable energy sources such as wind energy,solar energy and ocean energy are strongly influenced by environmental,meteorological and geographical conditions,and are highly stochastic and discontinuous.Large scale energy storage technology is considered as a strategic technology to support the popularization of renewable energy.All vanadium redox flow battery(VRB),as the largest,most advanced technology and the most close to industrialization,is the most efficient rechargeable battery with high power,high energy,high efficiency,low cost,long life,high safety,no pollution and so on.It has a very good application prospect in the broad fields of wind and energy storage,power peak adjustment,communication base station,military backup energy,smart grid,distributed power station,emergency power supply,traffic and municipal and other fields.Therefore,the control and monitoring of VRB energy storage system is the premise of efficient use of VRB system.Studying the VRB monitoring system can effectively use the VRB system,and has great engineering application value for improving the life of VRB.In this dissertation,the principle of full vanadium rechargeable battery charging and discharging and the influence of the parameter are described in detail.Secondly,the model of all vanadium redox flow battery is analyzed,the equivalent loss model is selected,the different charge discharge methods of all vanadium redox battery are described systematically,and the constant current charging of all vanadium current battery is carried out.5 simulation experiments,including constant voltage charging,constant load discharge,different load discharge,charge and discharge switching,verify the accuracy of the model.The extended Calman filter algorithm is used to estimate the charge state of all vanadium redox flow battery,and the internal resistance of all vanadium redox flow battery is identified.The charge state of vanadium battery group is balanced by the frequency conversion equilibrium strategy based on the flying capacitance method.The temperature of all vanadium redox flow battery system is monitored by infrared thermometer.The user interface of the host computer is designed to realize the monitoring of all vanadium redox flow battery.