分佈式太陽能發電系統之最大功率追蹤系統設計與實現

本文主旨在探討分佈式與集中式太陽能發電系統，一般集中式發電系統在遮光效果及太陽能板模組不匹配情況下的發電效率較差，而分佈式是將每單一個模組直接接一組昇壓式轉換器，使得每單一模組擁有各自的最大功率追踨，這樣可保持每一模組在遮光效果及太陽能板模組不匹配情況下，可以提高整體的輸出功率，在控制器部份使用Arduino微控制器，最大功率追踨法為擾動觀察法配合移動平均法，可以降低擾動觀察法在最大功率點時的飄移現象。且將多組的控制器整合為單一模組之控制器，可省略控制器使用上的數量及成本。並以LCD面板顯示每塊太陽能電池輸出功率及工作狀態(如：正常、受到遮蔽或故障)。最後透過Zigbee進行無線傳輸功能，將資料以Excel檔案呈現並儲存於電腦。簡言之本研究整合Arduino微控制器與Zigbee無線傳輸功能，實際製作了分佈式太陽能發電系統，最終實驗結果顯示本文所提出之理論與設計，具有相當的準確性，能夠達到提升太陽能系統發電效能之目的。

關鍵字

最大功率追蹤；分佈式太陽能發電系；擾動觀察法；移動平均法

並列摘要

This thesis focuses on distributed PV solar power systems. Common central power generation has worse efficiency when shading effect occurs. This motivates us on distributed PV solar systems. Distributed solar power connects a boost converter on every solar module to make every solar module with maximum power point tracking (MPPT) function. This can enhance overall output power even when shading effect exists. Microprocessor Arduino is applied in this study as a system controller. The maximum power point tracking applied at this study is a combination of the Perturbation and Observation method (P&O) and the moving average method, whereby MPPT can be achieved successfully. This method only needs one controller. Hence, the quantity and the cost of controllers can be reduced. Finally, we use Zigbee module to do wireless data transmission and save the data in computer as excel file. Moreover, an LCD panel is used to display the shading position of solar modules and many other functions. Finally, experimental results show that the developed distributed structure and the MPPT method can precisely enhance solar power generation efficiency.

並列關鍵字

Maximum power point tracking ； Distributed PV solar power ； Perturbation and Observation method ； Moving average method

參考文獻

[2] N. Femia, G. Lisi, G. Petrone, G. Spagnuolo and M. Vitelli, “Distributed Maximum Power Point Tracking of Photovoltaic Arrays: Novel Approachand System Analysis,” IEEE Trans on Indus Elect, vol. 55, no. 7, Jul 2008, pp. 2610-2621.

[3] M. M. Casaro and D.C.Martins, “Grid-Connected PV System Using a Three-Phase Modified Dual-Stage Inverter,” Power Electronics Conference, 2009.COBEP'09. Brazilian, Bonito-Mato Grosso do Sul, Sept. 27 2009-Oct. 1 2009pp.167-173.

[6]S. Liu and R. A. Dougal, “Dynamic Multiphysics Model for Solar Array,” IEEE Trans. Energy Convers, vol. 17, no. 2, pp. 285–294, Jun. 2002.

[7]G. Petrone, G. Spagnuolo, and M. Vitelli, “Analytical Model of Mismatched Photovoltaic Fields by Means of Lambert W-function,” Solar Energy Materials and Solar Cells, vol. 91, no. 18, Nov. 2007, pp. 1652–1657.

[8]G. R. Walker and P. C. Sernia, “Cascaded DC–DC Converter Connection of Photovoltaic Modules,” IEEE Trans. Power Electron, vol. 19, no. 4, Jul. 2004, pp. 1130–1139.

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分佈式太陽能發電系統之最大功率追蹤系統設計與實現

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