【摘要】 随着电网中分布式电源的日益增多,储能技术在提高系统的稳定性和改善电能质量方面显得越来越重要。考虑到当前储能元件的特性,复合储能系统比单一储能系统具有更多优点。为了改善储能单元动态响应特性,提出了一种改进的控制策略,储能装置均采用电流-电压下垂。为了降低电池的响应速度,在其传统下垂控制中加入了虚拟电感,并且在超级电容(SC)储能单元的控制中加入了电流前馈控制,加快其动态响应速度,使其响应更多高频功率。最后,仿真和实验结果验证了所提策略的正确性和有效性。更多还原

【Abstract】 With more and more implementation of renewable energy sources within power systems,energy storage technology is ever more important for improving system stability and power quality.Compared with the single energy storage system,hybrid energy storage system has more advantages in view of characteristics about present storage elements.In order to improve the dynamic performance about energy storage units,an improved control strategy is presented,all storage devices use I-U droop control.In order to reduce the response speed of battery’s current,virtual inductor is added into battery’s traditional droop control,and current feed forward control scheme is used in the control of supercapacitor(SC),which increases the speed of its dynamic performance and allows it to respond to more high fre-quency component of power flow.Finally,the simulation and experimental results are presented to verify its correctness and effectiveness.更多还原