摘要
为了解决混合储能系统功率分配时因模态混叠导致功率分配不精确、储能系统成本过高的问题,提出一种多次滑动均值滤波(MMAF)的功率分配方法用于削弱模态混叠现象,降低混合储能成本。首先,获取满足平抑要求的混合储能最小总功率指令,采用MMAF算法对其进行滤波,获得蓄电池与超级电容各自的功率指令,引入Pearson相关系数量化模态混叠现象,作为判断滤波次数和每次滤波滑窗大小的指标,将蓄电池和超级电容各自的功率指令作为储能定容的可行域,考虑电池荷电状态约束求取储能适配的最小额定功率和额定容量;然后,基于等效运行时间建立蓄电池全寿命周期量化模型,为经济性分析提供依据;最后,以改进的混合储能全寿命周期成本模型验证了该文方法可以有效地限制模态混叠,降低混合储能系统成本。
When the hybrid energy storage system(HESS)allocates power in the scenario of suppressing wind power fluctuations,the power distribution is inaccurate due to mode aliasing,which leads to the poor economy of the hybrid energy storage system.To address these issues,this paper suggests a method of multiple moving average filtering(MMAF)to decompose the total power command of hybrid energy storage.Firstly,the minimum flat total power command of hybrid energy storage meeting the flat requirements was obtained,and the obtained total power command of hybrid energy storage was filtered through MMAF to make the battery respond to the filtered low frequency part and the supercapacitor respond to the high frequency part.Pearson correlation coefficient was used as the index to quantify modal aliasing,and Pearson correlation coefficient was used as the basis to determine the optimal filtering sliding window size and the optimal filtering times to ensure that the maximum limit of modal aliasing can be achieved under the sliding window size and filtering times.Taked the power command of the battery and the supercapacitor as the feasible region of the energy storage capacity,the minimum rated power and rated capacity of the hybrid energy storage system can be determined by comprehensively considering the battery state of charge(SOC)constraints.Secondly,based on the equivalent operating time,a quantitative model of battery life cycle was established,which provided a basis for the economic analysis of hybrid energy storage system.The cumulative effect of battery charging and discharging on its life loss was considered in the model,and the actual number of battery cycles was converted into the equivalent number of cycles at the rated discharge depth.Finally,the incremental factor of battery maintenance cost was introduced into the hybrid energy storage life cycle cost model(LCC)to describe the nonlinear increase of maintenance cost caused by the cumulative effect of battery aging every ten years,so as to better conform to the actua
作者
田博文
张志禹
杨梦飞
Tian Bowen;Zhang Zhiyu;Yang Mengfei(College of Electrical Engineering Xi′an University of Technology,Xi′an 710048 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2024年第5期1548-1564,共17页
Transactions of China Electrotechnical Society
基金
国家自然科学基金联合基金重点资助项目(U21A20485)。
