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采用模糊指数趋近律的光伏MPPT滑模算法

更新时间:2020-10-30 03:31:25 大小:1M 上传用户:zhengdai查看TA发布的资源 标签:光伏mppt 下载积分:2分 评价赚积分 (如何评价?) 打赏 收藏 评论(0) 举报

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针对现有滑模MPPT普遍采用的等速趋近律且不能兼顾MPPT的快速性与稳定性的问题,提出了一种基于模糊指数趋近律的滑模控制算法。基于光伏电池的工作特性,建立了Buck型光伏直流发电系统的周期平均状态模型,并给出了基于李亚普诺夫函数稳定性的滑模存在性证明和控制律的详细设计。用Matlab/Simulink对系统建模与仿真分析。系统仿真结果表明,设计的控制算法能很好地实现光伏系统MPPT,控制算法实用有效。

The constant speed sliding-mode,which is widely applied in the existing sliding-mode maximum power point tracking(MPPT),cannot strike a balance between the rapidity and stability of MPPT.To solve this problem,a slidingmode control method is proposed on the basis of fuzzy exponential approach law.According to the operating characteris?tics of photovoltaic(PV)cells,a cyclic average state model of a DC PV power generation system with Buck circuitis es?tablished;in addition,the proof for the existence of sliding-mode based on the stability of Lyapunov function and the detailed design of the control law are given.Matlab/Simulinkis used in the system modeling and simulation analysis.Simulation results show that the designed control algorithm is practical and effective,which can well realize MPPT in the PV system.

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