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光伏发电系统MPPT输出功率采样周期的优化设计

, PP. 24-29

Keywords: 光伏系统,采样周期,最大功率点追踪,小信号模型,动态特性

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Abstract:

近年来,光伏发电研究主要集中在变换器拓扑结构、最大功率点追踪(maximumpowerpointtracking,MPPT)和并网发电。但一些实验研究发现,输出功率采样周期对光伏系统性能具有较大的影响。该文以太阳能电池基本电路方程为基础,构建不依赖于变换器及MPPT算法的光伏系统采样周期与光照强度、环境温度、工作电压、工作电流、占空比之间的小信号数学模型,详细分析采样周期在寻优过程中的作用机理。仿真和实验结果表明,该构建的光伏系统采样周期数学模型具有较高的可靠性和实用性。

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