Analysis on Control Strategy of Flywheel Energy Storage Staged Grid-Connection Start-Up Based on Fuzzy PI Control
Compared with other traditional energy storage technologies,flywheel energy storage has the characteristics of minute second level,high power,long lifespan,high efficiency,and high density,and has become one of the most promising energy storage technologies for future new power systems.This paper focuses on the problems of error between the expected and actual power values,internal interference caused by electromagnetic power increase,and difficulty in adjusting control parameters during the start-up process of the traditional permanent magnet synchronous motor variable frequency speed control method for flywheel energy storage.Based on the classical vector control strategy,by switching control objectives and reference values in stages,combining fuzzy control technology with PI controller,a flywheel energy storage staged grid connected start-up control method based on fuzzy PID control is proposed.A simulation model for flywheel energy storage grid connected start-up is established based on MATLAB/Simulink.The simulation results show that during the starting process of the flywheel motor,the load torque setting process,and the speed command mutation process,the PI controller parameters can achieve self-tuning.The electromagnetic torque and speed adjustment time of the flywheel motor are significantly shortened,and the adjustment speed can be increased by nearly 50%.The DC bus voltage at each stage can be kept constant with small fluctuations,ensuring stable operation of the inverter,which verifies that the proposed control method can solve the difficulty in parameter tuning caused by control target switching and improve the dynamic performance of the control system.
flywheel energy storagegrid-connection start-upelectromagnetic torquestaged controlparameter adaptationvector control
万方数据
维普
