基于混合储能的可调度型分布式电源控制策略  

Control strategy of dispatchable distributed generation based on hybrid energy storage

作　　者：燕跃豪[1] 鲍薇[2] 李光辉[2] 孙艳霞[2] 

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206 [2]中国电力科学研究院,北京100192

出　　处：《华北电力大学学报（自然科学版）》2014年第2期28-35,共8页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家重点基础研究发展计划项目(973项目)(2012CB215206);国家高技术研究发展计划项目(863项目)(2011AA05A106;2011AA05A301)

摘　　要：针对由蓄电池/超级电容器混合储能系统和可再生能源发电单元组成的共直流母线结构的可调度型分布式电源,制定了综合考虑各储能元件SOC状态和蓄电池使用寿命的分布式电源控制策略。当储能元件的SOC状态未越限时,可再生能源发电系统采用MPPT控制,采用带滤波补偿系数的低通滤波法得到蓄电池的参考功率,超级电容采用定电压控制;当储能元件的SOC状态越限时,采用基于不同直流母线电压运行区间的多模式切换控制,保证直流母线电压的稳定;为了避免系统控制模式之间频繁切换带来的暂态冲击,采用超级电容端电压预控制,防止超级电容端电压越限。最后,利用PSCAD/EMTDC仿真算例验证了控制策略的合理与有效性。A control strategy of dispatchable distributed resource composed of battery/super capacitor hybrid energy storage system is presented, in which the state of charge （SOC） of energy storage devices and the cycle life of battery is considered. When the SOC of energy storage devices are within the limits, MPPT control is adopted in renewable en- ergy generation system, and the reference power of battery is determined by low pass filtering algorithm with compensa- ting filtering coefficient and constant voltage control is adopted in super capacitor. When the SOC of energy storage de- vices reaches the limits, a novel mode switch control based on different voltage zones of DC bus is presented to guaran- tee the stable operation of DC bus. To avoid the transient shock brought by frequent switching between various control modes, super capacitor terminal voltage pre-control is proposed to prevent the SOC of super capacitor reaching its lim- its. Finally, the performance of the proposed control strategy is verified by digital time-domain simulation studies in PSCAD/EMTDC software environment.

关 键 词：蓄电池 超级电容器 混合储能系统 可再生能源发电 可调度型分布式电源 

分 类 号：TM77[电气工程—电力系统及自动化]