混合储能系统中超级电容的作用及容量设计方法  

Role and Capacity Design Method of Supercapacitor in Hybrid Energy Storage System

作　　者：黄秀琼[1] 丁若星[2,3] 肖曦[3] 王奎[3] 田培根[3] 

机构地区：[1]广西电网公司,南宁市530023 [2]中国舰船研究设计中心,武汉市430064 [3]电力系统及大型发电设备安全控制国家重点实验室(清华大学电机系),北京市100084

出　　处：《电力建设》2014年第12期67-71,共5页Electric Power Construction

基　　金：国家高技术研究发展计划项目(863计划)(2012AA05017)

摘　　要：针对超级电容和锂离子电池经Buck-Boost双向DC/DC变换器升压后并联的混合储能系统(hybrid energy storage system,HESS),详细分析了储能系统电流响应特性的影响因素。根据超级电容功率特性好和锂离子电池容量较大的特点,分析这2种储能介质在储能系统中的作用,并在此基础上提出了一种电池不直接响应功率指令,而是根据超级电容荷电状态进行充放电的功率分配方法。最后介绍了在该功率分配方法下超级电容的容量设计依据,并结合直驱型波浪发电输出功率的波动特性给出了算例。According to the hybrid energy storage system（ HESS） in w hich supercapacitor and Li-ion battery w ere in parallel after boosted respectively by Buck-Boost bidirectional DC / DC converter,this paper analyzed the influencing factors of the current response characteristics of the HESS in detail. Based on the characteristics that supercapacitor had good pow er characteristics and Li-ion battery had large capacity,the roles of tw o energy storage mediums in HESS w ere analyzed. On this basis,this paper proposed a pow er allocation method in w hich the charging and discharging of battery did not respond directly to pow er instruction,but in accordance w ith the state of the state of supercapacitor. Finally,this paper introduced the capacity design basis of supercapacitor w ith this pow er allocation method,and presented examples combined w ith the fluctuation characteristics of output pow er in direct-drive w ave pow er generation system.

关 键 词：混合储能(HESS) 超级电容 电流响应 功率分配 容量设计 

分 类 号：TM727[电气工程—电力系统及自动化]