Control Strategy for Suppressing Pv Power Fluctuation in Hybrid Energy Storage System
In this paper,a new power distribution control strategy for hybrid energy storage(HESS)is proposed.When photo-voltaic output power fluctuates or load changes,based on the characteristics of fast response speed and high power density of ultraca-pacitors,ultracapacitors are given priority to suppress power fluctuations,and then batteries are used as backup energy storage de-vices.Supercapacitors charged state of(SOC)is used as prolapse(Droop)control input,to ensure that the super capacitor to work in a reasonable state of charged(SOC)range.In this paper,the frequency control strategy based on low-pass filter algorithm are compared,the results show that this method not only reduces the battery discharge power and the number of charging and discharg-ing,also improves the cycle life of the battery.
hybrid energy storage systemstate of chargeDroop control
万方数据
维普
