部分遮挡条件下光伏阵列最大功率点跟踪方法
发布时间：2019-05-03 18:39
【摘要】：针对光伏阵列在部分阴影遮挡条件下具有多个局域最大功率点的最大功率点跟踪问题,在详细分析光伏阵列I-V特性的基础上,提出一种新颖的全局最大功率点跟踪方法。该方法根据光伏阵列最大功率点附近电压随电流的增加迅速下降的特点,先以大步长扫描方法锁定到各局域峰点附近,然后再采用PO法以小步长跟踪该峰点,最后通过比较搜索到的各个局域峰点的功率来确定全局最大功率点。仿真和实验结果表明所提方法能够准确而迅速地跟踪到全局最大功率点,有效提高光伏阵列在部分阴影遮挡条件下的并网发电输出效率。
[Abstract]:In order to solve the problem of maximum power point tracking with multiple local maximum power points in partially shaded photovoltaic arrays, a novel global maximum power point tracking method is proposed on the basis of detailed analysis of the I _ (V) characteristics of photovoltaic arrays. According to the characteristics that the voltage near the maximum power point of the photovoltaic array decreases rapidly with the increase of the current, the large step scanning method is first locked to the local peak point, and then the peak point is tracked by the PO method in small steps. Finally, the global maximum power point is determined by comparing the power of each local peak point. Simulation and experimental results show that the proposed method can track the global maximum power point accurately and rapidly and improve the output efficiency of grid-connected photovoltaic arrays under partially shaded conditions.
【作者单位】： 合肥工业大学电气与自动化工程学院;安徽大学电气工程与自动化学院;铜陵学院电气工程学院;
【基金】：国家自然科学基金(51307042) 安徽省高校自然科学基金重点项目(KJ2014A258)
【分类号】：TM615
[Abstract]:In order to solve the problem of maximum power point tracking with multiple local maximum power points in partially shaded photovoltaic arrays, a novel global maximum power point tracking method is proposed on the basis of detailed analysis of the I _ (V) characteristics of photovoltaic arrays. According to the characteristics that the voltage near the maximum power point of the photovoltaic array decreases rapidly with the increase of the current, the large step scanning method is first locked to the local peak point, and then the peak point is tracked by the PO method in small steps. Finally, the global maximum power point is determined by comparing the power of each local peak point. Simulation and experimental results show that the proposed method can track the global maximum power point accurately and rapidly and improve the output efficiency of grid-connected photovoltaic arrays under partially shaded conditions.
【作者单位】： 合肥工业大学电气与自动化工程学院;安徽大学电气工程与自动化学院;铜陵学院电气工程学院;
【基金】：国家自然科学基金(51307042) 安徽省高校自然科学基金重点项目(KJ2014A258)
【分类号】：TM615
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