由於高聚光型太陽能(high-concentration photovoltaic, HCPV)發電系統係由高倍數之聚光透鏡，將來自太陽的平行光聚焦於III-V族太陽能電池上，因此能夠有效率的利用太陽能電池。但是隨著聚焦倍數增加，HCPV發電系統便需要一套高精度和高穩定性之追日系統，以維持HCPV發電系統的最佳功率輸出和供電可靠度，降低對電網穩定度的影響。
為了達成上述的目標，本文結合模糊理論和基因演算法，設計一適應性模糊控制(adaptive fuzzy control, AFC)系統，並且將之應用於HCPV發電系統的追日系統上。首先，本系統以模糊語言變數和模糊控制規則描述追蹤太陽的行為，並應用基因演算法則線上最佳化模糊控制系統之歸屬函數，使追日系統能夠達到快速追蹤、減低穩態追蹤誤差和增加強健性。
由於本文中HCPV發電系統係利用光感測器回授信號作為追日系統的輸入參數，所以容易受天氣和如灰塵遮蔽等外在環境因素影響其追蹤精度。因此，為了改善來自環境因素影響的追蹤誤差，本文另外設計兩個追蹤模式，分別為太陽軌跡追蹤和光感測器校正模式，輔助AFC追日系統。其中太陽軌跡追蹤模式係用以幫助追日系統避免光感測器的追蹤死角；而光感測器校正模式則係用來自動校正光感測器的追蹤精度，改善例如灰塵等陰影遮蔽對追日系統追蹤性能的影響。最後本文將AFC追日系統與傳統PID追日系統比較，顯示AFC追日系統較PID控制方法更具有良好的追蹤性能和適應性。

Because the high-concentration photovoltaic(HCPV) system focus the sunlight to the solar cells of III-V by a high-concentration ratio lens, so that the solar cells is used in a high efficiency. But the HCPV system need a great precision sun tracking system to keep the high power output and stability, when the concentration ratio increase.
In order to achieve the above aim, this thesis combine the fuzzy theory and the genetic algorithm, and design a adaptive fuzzy control(AFC) system for sun tracking system in HCPV. The first, the system use the fuzzy language and fuzzy rule to describe the sun tracking action, and set the fuzzy membership function by the genetic algorithm online optimization, so that the sun tracking system can achieve the fast tracking, reduce the steady-state tracking error ,and increase the robustness.
Because the HCPV system take the photo-sensor feedback signal input to sun tracking, so that the tracking precision is sensitive to weather, dust, and the other external environmental factors. So, in order to improve the tracking error due to environmental factors, this thesis design the solar trajectory mode and photo-sensor correct mode to assist AFC sun tracking system. The solar trajectory mode is used to escape the dead space in photo-sensor tracking, and the photo-sensor correct mode is used to correct the tracking error automatically. Finally, this thesis compare the AFC sun tracking system and PID controller, and the sun tracking performance and robustness of AFC system is greater than PID controller.

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