基于小波分解的含备用系统混合储能系统功率分配  

Power allocation of hybrid energy storage system with standby system based on wavelet decomposition

作　　者：郑熙东 江修波[1] Zheng Xidong;Jiang Xiubo(College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350108)

机构地区：[1]福州大学电气工程与自动化学院,福州350108

出　　处：《电气技术》2020年第7期30-34,共5页Electrical Engineering

摘　　要：本文基于自适应小波包分解平抑风电波动来进行初始的功率分配,提出了采用带有备用系统的蓄电池-超级电容的混合储能系统,根据不同的实际风电出力波动情况,通过自适应小波包分解的方法对风电出力进行分解重构,求解出最优的自适应小波分解层数。针对蓄电池和超级电容构成的N个储能系统模型,增加一个备用系统,形成含有"N+1"个储能的系统,采用备用容量对分界的小波层进行吸收,对其进行功率分配,减少蓄电池的频繁充放电,以提高超级电容对于高频功率的吸收。在算例分析中,超级电容减少了对大幅值的功率吸收,备用系统承担了分界层的功率吸收,"N+1"储能系统能够实现功率的合理分配,提高储能元件的使用寿命。Initial power allocation is based on adaptive wavelet packet decomposition to suppress wind power fluctuations.In this paper,a battery-ultracapacitor hybrid energy storage system with a standby system is proposed.According to the fluctuation of the actual wind power output,the wind power output is decomposed and reconstructed by an adaptive wavelet packet decomposition method,the optimal number of adaptive wavelet decomposition layers is obtained.Aiming at the N energy storage system model composed of storage battery and super capacitor,a spare system is added to form a system containing“N+1”energy storage,it can reduce the frequent charge and discharge of the battery and improve the absorption of high frequency power by the super capacitor.In the case study,the super capacitor reduces the absorption of large amplitude power,and the standby system takes up the power absorption of the boundary layer.The“N+1”energy storage system can realize the reasonable distribution of power and increase the service life of the components.

关 键 词：小波包分解 混合储能 备用系统 功率分配 

分 类 号：TM73[电气工程—电力系统及自动化]