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光伏发电最大功率点跟踪交错并联Boost变换器的动力学特性分析

, PP. 38-45

Keywords: 交错并联Boost变换器,光伏发电,最大功率点跟踪,离散迭代映射

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Abstract:

DC-DC变换器作为光伏发电最大功率点跟踪(maximumpowerpointtracking,MPPT)控制器的核心部分,其动力学特性对系统的性能产生影响。该文基于非线性动力学系统理论,建立了光伏发电最大功率点跟踪(maximumpowerpointtracking,MPPT)交错并联Boost变换器的离散迭代映射模型,在此基础上采用分岔图、时域波形图、相轨迹图方法,研究了其动力学特性,并与一般Boost变换器特性进行比较。理论与实验结果均表明,在相同电路参数的情况下,与一般Boost变换器相比,交错并联Boost变换器的稳定域更大,电感电流和电容电压的纹波小、变化幅度小,更适用于光伏发电MPPT。

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