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題名 | 電流轉換器應用於太陽能電池之最大功率追蹤= |
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作者 | 林忠榮; 鄒宏基; 華志強; |
期刊 | 電力電子技術 |
出版日期 | 19990800 |
卷期 | 52 1999.08[民88.08] |
頁次 | 頁38-53 |
分類號 | 448.167 |
語文 | chi |
關鍵詞 | 電流轉換器; 太陽能電池; 最大功率; 能量守恆原理; 數位訊號處理器; Photovoltaic; MPPT; Current converter; DC-DC converter; DSP; Principle of energy conservation; |
中文摘要 | 本文首先介紹製造太陽能電池 (Photovoltaic Cells) 材料的比較,同時介紹影響太陽能電池性能的幾個重要因素, 並利 用軟體加以模擬分析。接下來則是說明太陽能電池的工作原理,因為要提高太能電池的輸出 功率,所以太陽能電池通常都是在最大功率點 (Maximum Power Point,MPP) 下操作,使其 能產生最高的功率並傳送至負載,且當照度和溫度等大氣條件改變時亦要維持此一性能,因 為在此一工作點下能夠改善太陽能電池和負載之間的阻抗匹配問題。太陽能電池在大部份的 應用中都將它視為一電壓源 (Voltage Source) , 本文則將其視為一電流源 (Current Source), 並使用簡單的方法來追蹤太陽能電池的最大功率點,使得太陽能電池在大氣條件 的改變下亦能維持在此點工作。由於將太陽能電池視為一電流源,因此本文將研製一電流源 轉換器 (Current Source Converter) 來追蹤太陽能電池的最大功率點。至於系統的等效電 路模型則是採用能量守恆原理 (Principle of Energy Conservation) 來推導其小訊號模型 與轉移函數。 採用此一方法是因其可以克服狀態空間平均法 (State-Space-Averaging Method) 的缺點, 且易於計算與分析。 最後藉由電腦模擬的結果與利用數位訊號處理器 (Digital Signal Processor,DSP) 為控制器之實驗模型電路所做的實測結果相互比較,驗 證所提出之演算法具有相當良好的性能。 |
英文摘要 | In this paper, the material characteristics of the photovoltaic cells are disscussed. The condictions that affect solar cells characteristic curves are studied and simulated by MATLAB. Photovoltaic cells power systems normally work at maximum power points (MPP) to continuously deliver the maximum possible power to the load when changes in insolation and temperature occur. Operating at the maximum power point, the photovoltaic cells produce maximum power and it overcomes the problem of mismatch between the the photovoltaic cells and the given load. How to track the MPP of photovoltaic cells is the emphasis of the investigation in this paper. Photovoltaic cells was treated as a current source, hence a current source converter was designed to track the MPP of photovoltaic cells. As to system equivalent circuit model, the principle of energy conservation is used to develop the largeand small-signal model and transfer function. By using this model, the drawbacks of state-space- averaging method can be overcome and the analysis and simulation can be easily completed. The TI320C25 digital signal processor (DSP) was used to implement the proposed maximum power point tracking (MPPT) controller, simulations and experimental results show excellent performance. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。