1.Tunnel and Underground Engineering Design Branch,Shandong Provincial Communications Planning and Design Institute Group Company Limited,Jinan 250000,China
Photovoltaic aprays are affected by external environmental factors, and local shading effects limit the system's power generation efficiency. To address this issue, this paper proposes an optimization control method that utilizes Logistics chaotic sequence initialization and adaptive weighting to construct an adaptive search aquila optimizer. This algorithm can dynamically track the maximum power point of the photovoltaic array, thus achieving optimal control of traffic self consistent energy system. Experimental results under different lighting conditions on a simulation platform demonstrate that the algorithm proposed in this paper has better tracking accuracy and speed compared to perturbation observation methods, particle swarm algorithms, and traditional aquila optimizer, and is less likely to get stuck in local optimal solutions. The proposed method has a certain reference value for improving the power generation efficiency of photovoltaic power generation systems and reducing operational costs in transportation.
目前,最大功率点跟踪(Maximum power point tracking, MPPT)算法可分为以恒定电压法[4]、电导增量法[5]、扰动观察法[6]为代表的传统方法和以智能搜索算法、神经网络等为基础的智能优化方法[7]。传统方法跟踪速度较慢且存在输出震荡现象,其跟踪效果并不理想。梁国壮等[8]提出一种扰动-模糊双模式控制算法,但该方法在变化的外界光照条件下,跟踪速度较慢且存在输出震荡现象。徐义涛等[9]与党秀娟等[10]利用粒子群算法实现跟踪;钟黎萍等[11]利用遗传算法提高变异率加快了收敛速度,并能较为精确的跟踪到最大功率点,然而这些方法无法兼顾全局搜索和局部搜索,在跟踪极值时易陷入局部最优解。赵华芳等[12]采用BP神经网络实现最大功率跟踪,并使用梯度下降法与高斯牛顿法提高收敛速度。赵子睿等[13]通过RBF神经网络进行跟踪,并通过自适应PID辅助修正。但是,上述方法基于人工神经网络,需要进行大量的样本训练,费时费力。因此,现有方法难以有效跟踪最大功率点,致使光伏阵列发电效率不佳。
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