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首页> 外文期刊>IEEE Power Electronics Letters >A new algorithm for rapid tracking of approximate maximum power point in photovoltaic systems
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A new algorithm for rapid tracking of approximate maximum power point in photovoltaic systems

机译：快速跟踪光伏系统中近似最大功率点的新算法

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摘要

This paper presents a new algorithm for tracking maximum power point in photovoltaic systems. This is a fast tracking algorithm, where an initial approximation of maximum power point is (MPP) quickly achieved using a variable step-size. Subsequently, the exact maximum power point can be targeted using any conventional method like the hill-climbing or incremental conductance method. Thus, the drawback of a fixed small step-size over the entire tracking range is removed, resulting in reduced number of iterations and much faster tracking compared to conventional methods. The strength of the algorithm comes from the fact that instead of tracking power, which does not have a one-to-one relationship with duty cycle, it tracks an intermediate variable Β, which has a monotonically increasing, one-to-one relationship. The algorithm has been verified on a photovoltaic system modeled in Matlab-Simulink software. The algorithm significantly improves the efficiency during the tracking phase as compared to a conventional algorithm. It is especially suitable for fast changing environmental conditions. The proposed algorithm can be implemented on any fast controller such as the digital signal processor. All the details of this study are presented.
机译：本文提出了一种跟踪光伏系统最大功率点的新算法。这是一种快速跟踪算法，其中使用可变步长可快速获得最大功率点的初始近似值（MPP）。随后，可以使用任何常规方法（例如爬坡或增量电导方法）确定确切的最大功率点。因此，消除了在整个跟踪范围内固定小步长的缺点，与传统方法相比，减少了迭代次数，并大大加快了跟踪速度。该算法的优势来自于这样一个事实，它不是跟踪功率，它与占空比没有一一对应关系，而是跟踪一个中间变量Β，该变量具有单调递增的一对一关系。该算法已在以Matlab-Simulink软件建模的光伏系统中得到验证。与常规算法相比，该算法显着提高了跟踪阶段的效率。它特别适合于快速变化的环境条件。可以在任何快速控制器（例如数字信号处理器）上实现所提出的算法。介绍了这项研究的所有细节。

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