本論文擬研製應用於潮流發電之全數控三相交流轉交流電源轉換系統，為了達到控制簡單與暫態反應迅速而採用數位控制器TMS320LF2407A為控制核心。主要轉換系統分為兩級架構，前級包含六開關三相昇壓型轉換器(Converter)，此前級架構具有下列優點分別為輸出電壓穩壓、功率因數修正控制以及適用於寬範圍輸入電壓與頻率等特性，可以使得轉換系統具有低電流總諧波失真，並藉由高功率因數降低不必要的虛功，提高整體系統之發電效率；後級三相換流器(Inverter)則實現潮流發電機所需之最大功率追蹤，來提高發電機產生之實際輸出功率。最後，於實驗室中完成一組 1 kW數位控制之電源轉換器系統雛型，並透過實驗驗證理論之可行性以及測試整體轉換系統之特性。

This thesis presents the design and implementation of a three-phase power conversion system for tidal current power system with digital control. The developed system consists of two power circuits, the front-end circuit is a three-phase boost rectifier with stable output voltage, high power factor, low current harmonic distortion, wide input voltage, and input frequency which succeed in improving overall efficiency of power generation. The rear-end circuit is a three-phase inverter with maximum power tracking for tidal power system to increase output power of the overall system. Finally, a 1kW power conversion system with digital control is implemented to verify the theoretical analysis.

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