基于非对称模糊控制的光伏m跟踪-毛金枝-电测与仪表.docVIP

光伏发电最大功率跟踪的非对称模糊控制* 毛金枝1, 杨俊华12, 陈思哲1, 吴捷3 (1．广东工业大学 自动化学院，广州 5100062．国网河南省电力公司信阳供电公司，河南 信阳 4640003．华南理工大学 电力学院，广州 510641) (MPP)。为提高光电能量转换效率，在分析PO机理的基础上，采用扰动观察法(PO)跟踪光伏电池MPP；针对PO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PO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。 关键词：光伏电池；；；TM727 文献标识码：A 文章编号：1001-1390（201）00-0000-00 symmetric fuzzy control of MPPT for photovoltaic system Mao Jinzhi 1, Yang Junhua 1, Wang Qiujing2, Chen Sizhe1, Wu Jie3 Faculty of Automation, Guangdong University of Technology, Guangzhou 510006, China. 2. Xinyang Grid Company of State Grid, Xinyang 464000, Henan, China. 3.South China University of Technology, Guangzhou 510641, Guangdong, China) Abstract: 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 changes. By analyzing the mechanism and structure of perturb and observe (PO) method, the PO method was used to track the MPP of PV cell to improve the efficiency of photoelectric energy conversion. Aiming at the shortcomings of PO, 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 software. Based on the established Matlab/Simulink simulation model, the MPPT curves which both of the PO 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. Keywords: photovoltaic cell, MPPT, PO method, asymmetric fuzzy control 0 引 言( 25℃、光照强度由1000W/m2变化到900