Study On Charge And Discharge Of Solar Flywheel Energy Storage System

With the depletion of fossil energy,the development and utilization of new energy is imminent.Solar photovoltaic power generation has been widely developed and applied for its advantages of pollution-free,renewable and rich resources.The electricity generated by solar photovoltaics is typically stored in lead-acid batteries,However,lead-acid batteries are gradually criticized for their disadvantages such as pollution and short service life.Flywheel energy storage device no pollution,long life and other advantages have become an ideal energy storage element,countries are also stepping up research.Flywheel energy storage is also valued in aerospace field.This paper takes flywheel energy storage system as the research object.Through the operation and stability of the flywheel energy storage system during charging and discharging,and the control of the motor,the core component of the energy storage system,is studied.Based on the principle of solar photovoltaic power generation,MPPT control system is used to control the power generated by photovoltaic battery group near the maximum power.select the relatively simple incremental conductance method,The operation process is not cumbersome,and can maximize the efficiency of photovoltaic cells generated by the electricity.Combined with the flywheel system operation,comparing the performance and advantages and disadvantages of various motors,Choose a cheap,easy to maintain and control three-phase ac asynchronous motor.For motor control,in order to better control the magnetic field orientation of the motor,the slip control method in vector control is selected to control the motor.Combined with the power tracking module,MPPT system and motor can better match the work.The solar flywheel charging and discharging system needs to be realized by the flywheel motor.When charging,the motor is in the electric state.Matlab/Simulink modeling and simulation are used to integrate the whole system It.shows that the motor can work stably and under control,and the electricity generated by solar energy can be used more efficiently,when discharging,the motor is in the generating state.At this time,the motor needs to be excited by the excitation circuit.The flywheel is used to drive the motor to rotate to generate electricity.Finally,combined with the stable operation of the generating state and discharging state of the system,the results were analyzed by Matlab/Simulink.The whole system,no matter it works in the power generation or discharge state,can run very well,and has the advantages of fast response speed and good control performance,so it has good practicability.