基于混合卷尾猴算法的光伏MPPT研究

Photovoltaic MPPT research based on hybrid capuchin algorithm

  • 摘要: 光伏阵列在局部遮阴的情况下会表现出多峰特性,传统的最大功率点跟踪方法难以快速准确地找到最大功率点。针对该问题,提出一种改进的卷尾猴算法与自适应扰动观察法结合的混合算法。该算法在初始阶段使用 Fuch 混沌映射生成初始种群,增强种群多样性;在领导者位置更新过程引入 Lévy 飞行策略因子和变色龙算法进行改进,增强全局寻优能力,提高收敛速度;在追随者位置更新过程中加入差分策略,增强局部寻优能力;当寻优到最优点附近时,改用自适应扰动观察法进行搜索,使系统快速准确地到达全局最大功率点。仿真结果显示,混合卷尾猴算法能更快速准确地达到全局最大功率点。

     

    Abstract: PV arrays exhibit multi-peak characteristics under localized shading, and the traditional MPPT method makes it difficult to find the maximum power point quickly and accurately. To address this problem, a hybrid algorithm that combines an improved capuchin monkey algorithm with an adaptive perturbation observation method is proposed. The algorithm uses Fuch chaotic mapping to generate the initial population in the initial stage, which enhances the population diversity; introduces Lévy flight strategy factor and the chameleon algorithm to improve the leader position updating process, which enhances the global optimization ability and the convergence speed; adds the differential strategy to the follower position updating process, which enhances the local optimization ability; and when the optimization reaches the vicinity of the optimal point, switches to the adaptive perturbation observation method for searching, which enables the system to quickly and accurately reach the global maximum power point. Simulation results show that the tracking accuracies of the Bottle Sea Sheath swarm algorithm, the Hybrid Capuchin monkey algorithm is able to achieve the global maximal power point in a more rapid and stable way.

     

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