部分遮擋條件下光伏陣列最大功率點跟蹤方法
發(fā)布時間:2019-05-03 18:39
【摘要】:針對光伏陣列在部分陰影遮擋條件下具有多個局域最大功率點的最大功率點跟蹤問題,在詳細(xì)分析光伏陣列I-V特性的基礎(chǔ)上,提出一種新穎的全局最大功率點跟蹤方法。該方法根據(jù)光伏陣列最大功率點附近電壓隨電流的增加迅速下降的特點,先以大步長掃描方法鎖定到各局域峰點附近,然后再采用PO法以小步長跟蹤該峰點,最后通過比較搜索到的各個局域峰點的功率來確定全局最大功率點。仿真和實驗結(jié)果表明所提方法能夠準(zhǔn)確而迅速地跟蹤到全局最大功率點,有效提高光伏陣列在部分陰影遮擋條件下的并網(wǎng)發(fā)電輸出效率。
[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.
【作者單位】: 合肥工業(yè)大學(xué)電氣與自動化工程學(xué)院;安徽大學(xué)電氣工程與自動化學(xué)院;銅陵學(xué)院電氣工程學(xué)院;
【基金】:國家自然科學(xué)基金(51307042) 安徽省高校自然科學(xué)基金重點項目(KJ2014A258)
【分類號】: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.
【作者單位】: 合肥工業(yè)大學(xué)電氣與自動化工程學(xué)院;安徽大學(xué)電氣工程與自動化學(xué)院;銅陵學(xué)院電氣工程學(xué)院;
【基金】:國家自然科學(xué)基金(51307042) 安徽省高校自然科學(xué)基金重點項目(KJ2014A258)
【分類號】:TM615
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