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首页> 外文期刊>Power Electronics, IET >Analysis for step-size optimisation on MPPT algorithm for photovoltaic systems
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Analysis for step-size optimisation on MPPT algorithm for photovoltaic systems

机译：光伏系统MPPT算法的步长优化分析

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摘要

As the output characteristic of photovoltaic arrays is a non-linear function of external environment, the step-size of maximum power point tracking (MPPT) algorithm should be regulated dynamically to improve the MPPT efficiency. However, the step-size, essentially determining the performance of MPPT algorithm, is often designed for a particular system with certain working conditions. To solve this problem, an optimisation algorithm is proposed in this study, which can adjust the step-size automatically. From the essence of optimisation problem, the tracking process can be converted into a maximum sequence which can be solved by several iteration algorithms. This study provides a simple and effective way to obtain the step-size. Once the iteration method is selected, the performance of the MPPT algorithm has been decided. The analysis of convergence, convergence order and stability are presented in this study. Comprehensive simulation and experimental results demonstrate that this proposed algorithm has a good stable and dynamic characteristic.
机译：由于光伏阵列的输出特性是外部环境的非线性函数，因此应动态调节最大功率点跟踪（MPPT）算法的步长，以提高MPPT效率。但是，步长通常是为具有某些工作条件的特定系统设计的，它决定了MPPT算法的性能。为了解决这个问题，本文提出了一种优化算法，该算法可以自动调整步长。从优化问题的本质来看，跟踪过程可以转换为最大序列，可以通过几种迭代算法来解决。这项研究提供了一种简单有效的方法来获取步长。一旦选择了迭代方法，就可以确定MPPT算法的性能。本文对收敛性，收敛阶数和稳定性进行了分析。综合仿真和实验结果表明，该算法具有良好的稳定性和动态特性。

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