本論文主旨在設計與製作一隔離型直流/直流轉換器系統，系統以三組相移式全橋轉換器與串並聯切換電路所構成。三組的相移式全橋轉換器輸入端以並聯連接，輸出端則連接至串並聯切換電路，以改變輸出端之連接狀態，使三組相移式全橋轉換器的輸出端可具有串聯與並聯九種不同輸出狀態，並透過風力發電機所輸出的電壓值和功率，判斷其工作區間並選擇工作模式。在較低的切入電壓時，輸出端以串聯狀態連接，使三組轉換器分壓輸出達成高輸出電壓增益，當風力發電機輸入功率上升時，將三組額定功率不同之相移式全橋轉換器輸出端採用並聯連接，由切換相對應之模式以分擔輸出電流，配合擾動觀察法的最大功率點追蹤策略，可使風力發電系統在變化的環境之下有最佳功率輸出。對三組轉換器進行效率取樣，並將取樣點數據進行線性迴歸擬合得到三組功率/效率曲線，在此配合粒子群演算法求解，以求出三組轉換器並聯時最佳效率之輸出功率分配，得到在整個操作範圍內得到最高的效率。本論文建立一5kW系統進行評估以及測試，並透過模擬與實驗結果來驗證提出之架構的可行性。

The subject of this thesis is to design and implement a dc/dc converter scheme for wind turbine generation system. The proposed structure consists of three phase-shift H-bridge converters and series parallel switching circuit.The input ports of the three H-bridges are paralleled directly while the output ports can be parallel and/or series through a switching mechanism which provides nine different configurations of the output ports.When the input voltage and the power provided by the wind turbine has been changed, this flexible system configuration enables the converter at low cut-voltage series for high voltage gain. When the wind turbine power rises, the converter connected in parallel to share the load current.Based on the above concepts developed two control strategies.One is based on the each converter specifications as the switching condition.When the input conditions change, using the appropriate converter output, is the load deployment strategy.Another is based on the each converter efficiency as a switching condition.When the input conditions are fulfilled, all the converter output in parallel, with optimized power allocation to make the system operate at maximum efficiency point, is the efficiency allocation strategy. The efficiencies of the individual H-bridge are measured and particle swarm method is applied to determine the optimum power dispatch. Also by the perturbation and observation method of load disturbance MPPT strategic partnership to make the proposed converter can be obtained over the entire operating range of the system more efficient.Finally, this thesis established a 5kW prototype with using the digital signal processor (DSP TMS320F28069) as the digital controller.Both simulation and experimental results demonstrate the validity of the proposed converter.

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