风光互补路灯系统混合储能控制研究

Study of control strategy for hybrid energy storage in wind-PV hybrid streetlight system

提出了一种用超级电容器和蓄电池为储能单元的风光互补路灯系统。利用超级电容器比功率高、寿命长、体积小、质量轻的优点,构成了以超级电容器为主、蓄电池为辅的混合储能系统,为风光互补路灯系统提供充足、稳定、可靠的能量保证。该储能系统的引入保证了风能大范围变化时路灯系统的储能问题,在电能大幅度变化时,超级电容起到储能的缓冲作用,利用超级电容器的储能能力和并联控制器的变流控制作用,可以减少蓄电池的充放电小循环次数,减小放电深度,延长蓄电池使用寿命。通过仿真验证了理论分析的正确性。

A hybrid energy storage system in wind-PV hybrid streetlight was presented.With this technique,a lighter and smaller energy storage system could be achieved which enhanced the performance of the wind-PV hybrid streetlight system.Supercapacitor have drawn more and more attention on energy storage systems because of its advantages of high power density,high charging speed and extremely high cycling capability.Hybrid energy storage system using supercapacitors and batteries proposed new characteristics.In this way,the batteries could ensure only the average power,and the supercapacitors could ensure the power variations.The lifetime of the batteries,weight and volume of the HESS in wind-PV hybrid streetlight could thus been improved.The simulation results verifies the validity of proposed control strategy.