基于变分模态分解的混合储能系统协调控制  

Coordinated Control of Hybrid Energy Storage System Based on Variational Mode Decomposition

作　　者：张晓宇 张建成[2] 王宁[2] 王冠 ZHANG Xiaoyu;ZHANG Jiancheng;WANG Ning;WANG Guan(Maintenance Company of State Grid Tianjin Electric Power Company,Tianjin 300143,China;School of Electrical and Electronics Engineering,North China Electric Power University,Baoding 071003,China;State Grid Hebei Electric Power Company Co.,Ltd.,Baoding Electric Power Supply Branch,Baoding 071000,China)

机构地区：[1]国网天津市电力公司检修公司,天津300143 [2]华北电力大学电气与电子工程学院,河北保定071003 [3]国网河北省电力有限公司保定供电分公司,河北保定071000

出　　处：《中国电力》2018年第9期165-173,共9页Electric Power

基　　金：国家自然科学基金资助项目(51177047);河北省科技计划项目(16214504D);中央高校基本科研业务费专项资金资助项目(2016MS89)~~

摘　　要：针对自然条件下光伏电源出力的波动性和间歇性,以铅酸蓄电池和超级电容器组成的混合储能系统为基础,提出了一种基于变分模态分解(variational mode decomposition, VMD)的储能系统功率分层分配方法。储能系统承担的净负荷经过VMD分解后的高频波动分量分配给超级电容器承担,趋势分量分配给蓄电池承担;同时根据各储能单元的实时最大可充放功率和荷电状态对初级功率分配进行二次修正。仿真实例表明,该方法可有效平抑净负荷波动,并实现了储能系统调节特性的优化和储能单元的长期稳定运行。In view of the active power fluctuation and intermittence of photovoltaic(PV)power systems,based on a hybrid energy storage system consisting of super capacitors and lead-acid batteries,a layered active power allocation strategy is formulated to optimize the output power of PV source based on the method of variational mode decomposition(VMD).First,the net load which is supplied by the hybrid energy storage system is decomposed by VMD method.Then the low-frequency components and highfrequency components are allocated to the lead-acid batteries and super capacitors respectively to smooth out the fluctuations of output power of PV.At the same time,the orders of VMD filter are adjusted secondarily according to the state of charge(SOC)and the largest chargable/dischargable power in real time.The simulation tests demonstrate that using this method can effectively smooth out the fluctuation of net load,and the regulation performance and long-term and stable operation of the hybrid energy storage system are able to be optimized.

关 键 词：独立微网 光伏发电 混合储能 变分模态分解 功率分配 

分 类 号：TM615[电气工程—电力系统及自动化] TK02[动力工程及工程热物理]