再生能源发电中考虑SOC的复合储能控制策略.pdf

西安理工大学学报 Journal of Xi' an University of Technology(2014)Vol.30No.3
299
文章编号:1006-4710(2014)03-0299-05
再生能源发电中考虑SOC的复合储能控制策略
刘金虹',张辉2,杨秉翰,李洁',闵阳,杨凯
(1.西安理工大学自动化与信息工程学院,陕西西交710048;
2.西安交通大学电力设备电气绝缘国家重点实验室,陕西西安710049)
摘要:为了维持微网中各发电单元输出功率与负荷功率的瞬时平衡,需要儲能单元烦繁地充放电,
对传统大功率锂离子电池的内部温度等产生较大的负面影响,导致电池容量积累性亏损并在短时
间内快速下降,缩短其使用寿命。文中提出了适用于後网的超导磁储能与锂离子电池混合储能结
构,将SMES与锂离子电池通过各自DC/DC变换器并联到直流母线,并推导了混合储能的简化模
型,利用滑动平均滤波法将波动功率高频部分分配给SMES,低频波动部分分配给锂离子电池。根
据不同的SOC工作状态(正常,警告,报警等),动态调节滤波时间常数,从而调节功率分配。该
HESS在风力发电中的仿真试验验证了所提出的混合储能拓扑及滑动平均滤波法动态分配策略的
有效性
关键词:复合储能;荷电状态;超导磁储能;锂电池;变截止频率
中图分类号:TM921文献标志码:A
Control strategy of hybrid energy storage for renewable energy considering SOC
LIU Jinhong:, ZHANG Hui, YANG Binghan LI Jie MIN Yang, YANG Kai!
(1. Faculty of Automation and Information Engineering, Xi'an University of Technology
Xi'an 710048, China; 2. Open Fund of State Key Iaboratory of Electrical Insulation and
Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China)
Abstract: In order to maintain the instantaneous power balance of each micro-grid power genera-
tion unit and load, frequent charging and discharging of the energy storage unit is urgently nee
ded, which has a great negative effect on the internal temperature of traditional high-power lithi-
um-ion battery, leading to the accumulation loss of battery capacity in a rapid way in a short time
and shortening its life span. In this paper, a hybrid energy storage system(HESS) topology or
superconducting magnetic energy storage (SMES) and lithium-ion battery suitable for micro-grid
is proposed, SMES and lithium-ion batteries are connected in parallel to the DC bus by respective
DC/DC converters, and simplified model of hybrid energy storage is derived, high frequency part
of the fluctuation of the power is allocated to SMES, the low-frequency fluctuation part is as
signed to lithium-ion battery by using moving average filtering method. The filter time constant
is dynamically adjusted depending on the SOC work status (normal, warning, alarm, etc.
thereby adjusting the power distribution. Simulation test of HESS used in wind power generation
can validate the effectiveness of the proposed topology and moving average filtering method.
Key words: HESS, SOC, SMES, Li-ion battery, variable cut frequency
收稿日期:2014-03-06
基金项目:国家自然科学基金资助项目(50977078);国家自然科学基金资助项目(51277150/E070602);陕西省工业攻关
(2013K0705);陕西省教育厅产业化培育资助项目(14JFO20);电力设备电气绝缘国家重点实验室开放基金资
助项目(EIPE12209);西安市碑林区科技计划资助项目(GX1210);陕西省重点学科建设专项资金资助项目
(105-00X1201)。
作者简介:刘金虹,男,博士生,研究方向为再生能源发电及其储能解决方案。E-maill:lrainbow(④163.com。
张辉,男,教授,博导,研究方向为节能与新能源发电、电动车驱动系统。E-mail:zhang(@xaut.ecdu.cn。