光伏发电最大功率跟踪的非对称模糊控制  

Asymmetric fuzzy control of MPPT for photovoltaic system

作　　者：毛金枝 杨俊华[1] 王秋晶[2] 陈思哲[1] 吴捷[3] 

机构地区：[1]广东工业大学自动化学院,广州510006 [2]国网河南省电力公司信阳供电公司,河南信阳464000 [3]华南理工大学电力学院,广州510641

出　　处：《电测与仪表》2015年第18期57-62,共6页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(51307025;513770265;5177050);广东省高等学校科技创新项目(2013KJCX0059);广东省自然科学基金资助项目(S2012040007895);广东高校优秀青年创新人才培养计划项目资助(2012LYM_0052);广东省教育厅专项重点实验室(IDSYS200701)

摘　　要：受外界环境影响,光伏电池系统的输出特性呈现非对称的强非线性,输出功率常常偏离最大输出功率点(MPP)。为提高光电能量转换效率,在分析P&O机理的基础上,采用扰动观察法(P&O)跟踪光伏电池MPP;针对P&O缺点,在MPP两侧采用不同的隶属度函数和模糊控制规则,提出了一种非对称模糊控制算法,并使用Matlab中的Fuzzy工具箱对模糊控制器进行了设计。基于所搭建的Matlab/Simulink仿真模型,对比分析了在环境变化时P&O法和非对称模糊控制法的最大功率点跟踪曲线。仿真结果表明,所提方法提高了MPP跟踪的动稳态性能,在外界环境变化时更能有效、快速、准确的实现最大功率点跟踪。The output characteristics of photovoltaic cell system become asymmetric along with strong nonlinear , and the output power of system always deviates from the maximum power point （ MPP） as the external environment chan-ges.By analyzing the mechanism and structure of perturb and observe （ P＆O） method, the P＆O method was used to track the MPP of PV cell to improve the efficiency of photoelectric energy conversion .Aiming at the shortcomings of P＆O, the asymmetric fuzzy control strategy was proposed through employing different membership functions and fuzzy control rules at both sides of the MPP , and the fuzzy controller was designed by the fuzzy toolbox of the Matlab soft-ware.Based on the established Matlab/Simulink simulation model , the MPPT curves which both of the P＆O method and the asymmetric fuzzy control method were compared and analyzed when the external environment changed .The simulation results showed that the proposed method improved the dynamic and steady state performance of MPPT and can more efficiently , quickly and accurately track the MPP in any the external environment .

关 键 词：光伏电池 MPPT 扰动观察法 非对称模糊控制 

分 类 号：TM727[电气工程—电力系统及自动化]