微电网中混合储能模糊自适应控制策略  

A Fuzzy Adaptive Control Strategy for Composite Energy Storage System to Cope With Output Power Fluctuation of Intermittent Energy Source in Microgrid

作　　者：熊雄[1] 王江波[1] 杨仁刚[1] 叶林[1] 

机构地区：[1]中国农业大学信息与电气工程学院,北京市海淀区100083

出　　处：《电网技术》2015年第3期677-681,共5页Power System Technology

基　　金：国家高技术研究发展计划(863计划)(2012AA050203)~~

摘　　要：针对网内间歇性电源输出功率的波动性,建立了以相邻时段间歇性电源输出变化和供需功率平衡为基础的评价指标。提出了基于小波包分解的混合储能充放电策略,以小波包分解的间歇性电源功率高、中频分量作为混合储能初始充放电值,利用供需不平衡功率对混合储能充放功率的进行第1次修正,利用混合储能系统当前充放电能力的模糊控制输出对充放功率的进行第2次修正。算例结果验证了所提策略的有效性。In allusion to the output power fluctuation of intermittent energy source in microgrid, an evaluation index based on the output variation of intermittent energy sources within adjacent time intervals and the power balance between supply and demand is established. A wavelet packet decomposition based charging/discharging strategy of the composite energy storage system is put forward; the high- and medium-fi-equency components of the power of the intermittent energy source decomposed by wavelet packet are taken as the initial charging/discharging value of the composite energy storage system, and the unbalanced power between supply and demand is utilized to perform the first correction of the charging/discharging power of composite energy storage system, and the output of fuzzy control of present charging/discharging capability of the composite energy storage system is utilized to perform the second correction of the charging/discharging power. The effectiveness of the proposed strategy is validated by results of the case study.

关 键 词：微电网 混合储能 平滑输出 小波包分解 模糊控制 

分 类 号：TM721[电气工程—电力系统及自动化]