部分遮擋條件下光伏陣列最大功率點(diǎn)跟蹤方法
發(fā)布時(shí)間:2019-05-03 18:39
【摘要】:針對(duì)光伏陣列在部分陰影遮擋條件下具有多個(gè)局域最大功率點(diǎn)的最大功率點(diǎn)跟蹤問(wèn)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(diǎn)跟蹤方法。該方法根據(jù)光伏陣列最大功率點(diǎn)附近電壓隨電流的增加迅速下降的特點(diǎn),先以大步長(zhǎng)掃描方法鎖定到各局域峰點(diǎn)附近,然后再采用PO法以小步長(zhǎng)跟蹤該峰點(diǎn),最后通過(guò)比較搜索到的各個(gè)局域峰點(diǎn)的功率來(lái)確定全局最大功率點(diǎn)。仿真和實(shí)驗(yàn)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(diǎn),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(dòng)化工程學(xué)院;安徽大學(xué)電氣工程與自動(dòng)化學(xué)院;銅陵學(xué)院電氣工程學(xué)院;
【基金】:國(guó)家自然科學(xué)基金(51307042) 安徽省高校自然科學(xué)基金重點(diǎn)項(xiàng)目(KJ2014A258)
【分類(lèi)號(hào)】: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(dòng)化工程學(xué)院;安徽大學(xué)電氣工程與自動(dòng)化學(xué)院;銅陵學(xué)院電氣工程學(xué)院;
【基金】:國(guó)家自然科學(xué)基金(51307042) 安徽省高校自然科學(xué)基金重點(diǎn)項(xiàng)目(KJ2014A258)
【分類(lèi)號(hào)】:TM615
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