Rotor Structure Analysis And Application In Power System Of Flywheel Energy Storage

At present,energy problem has become the focus of attention of all countries.According to the problems existing in the development of thermal power and renewable energy,energy storage technology emerges at the historic moment.Flywheel energy storage is a new type of clean energy storage mode.Compared with other energy storage modes,flywheel energy storage operates in a vacuum environment with high response speed,low friction loss,high efficiency,long cycle service life,high power density,clean and environmental protection,free from geographical environment restrictions and almost no maintenance.The most important energy storage component in the flywheel energy storage system is the super-high speed rotating rotor,whose service conditions determine the safe and stable operation of the flywheel system,so the related research on the rotor in this paper is the most important.In this paper,by introducing the flywheel energy storage principle,structure analysis of finite element theory and relevant rules,apply Creo Parametric 4.0 M050 software on a 150kW rotor of the flywheel energy storage for 3 d modeling and structure analysis,by changing the rotor speed and the methods of material to study the rotor speed and the influence of different materials on the flywheel system to charge and discharge process,and the rotor of the flywheel energy storage structure analysis and research in the impacting factors of charging and discharging process application in power system.Through structural analysis,it was found that the flywheel rotor with steel AISI 4340 material and a rotating speed of 10,000 rpm can meet the requirements of strength check,stiffness check,stability check and fatigue check,and can conduct safe and stable charging and discharging process under the set boundary conditions.Based on a 150kW flywheel energy storage rotor model,the constraint conditions are kept unchanged.Through simulation of different rotating speeds,it is found that when the rotor speed is greater than 10016rpm,the safety factor is less than 1,that is,the material begins to appear fatigue damage.It is suggested that the actual charging and discharging process should not exceed the rotating speed.Through the simulation of different materials,it is found that the composite flywheel rotor is superior to the alloy flywheel rotor in terms of safety and stability,and it is suggested that the composite material should be given priority in engineering practice to obtain the best performance.Through theoretical analysis and simulation verify the advantages of the flywheel energy storage,found that the thermal power unit FM after joining the flywheel energy storage can solve thermal power unit in adjusting the delay phenomenon,effectively reduce thermal power unit spare capacity,reduce the energy loss on thermal power unit frequent action and irreversible fatigue and wear,effectively save energy,improve the efficiency of frequency modulation and quality.When flywheel energy storage is added to the wind power generation system,wind energy utilization efficiency can be improved,frequency offset can be eliminated,failure rate can be reduced and stability can be improved.