本文旨在設計市電併聯九相混合激磁型發電機之功率控制系統。發電機轉子採直流與永磁式激磁，其定子每相串聯電容，以抵銷發電機之等效電樞電感，增加發電機之輸出容量，並驅動單一開關型交/直流昇壓轉換器，回授其輸出電流以完成電流閉迴路的功率控制。三相換流器方面，則回授市電相電壓，並利用數位鎖相迴路估測市電角位置以用於同步旋轉座標系統轉換，俾利換流器輸出之電壓與電流的閉迴路控制；文中亦提出直流鏈電壓閉迴路之比例-積分控制，以穩定三相換流器之直流鏈電壓，將發電機之輸出饋入三相市電側而不受負載變動之影響。
本研究先建立九相混合激磁型發電機、單一開關型昇壓轉換器、三相換流器之模型，以及系統整合控制策略，俾利Matlab/Simulink作整體的模擬，並作為實作之依據。本系統以德州儀器公司之數位信號處理器TMS320F28335為控制核心，其控制策略皆由軟體程式完成，故可減少電路元件。本文已完成九相混合激磁型發電機功率轉換器及市電併聯的實體製作。在單一開關型昇壓轉換器操作於九相時，發電機輸出功率1162.8 W，發電機每相電流總諧波失真率為9.37 %，饋入市電側功率為1100.9 W，三相換流器每相電流總諧波失真率為8.07 %，整體功率轉換系統之效率為94.7 %。實測結果驗證了本文控制策略之可行性。

This thesis aims to design a power converter for nine-phase generator, whose magnetization consists of dc as well as permanent-magnet excitations. The output of the nine-phase generator is first connected in series with capacitors to counteract the equivalent armature inductance for increasing output power capacity. A single switch boost type ac-dc power converter introduced behind the capacitor will feedback its output dc current for the closed-loop control of current to yield the required power from the generator. Finally for the three phase power inverter, a digital phase-lock loop is designed to calculate the phase-angle of the grid voltage to facilitate frame transformation for the voltage and current closed-loop control of the inverter. In addition, a proportional-integral control is given for dc-link voltage to maintain its stability under load variation.
The models of nine-phase hybrid excitation generator, single switch boost type ac-dc power converter as well as three-phase power inverter are built and analyzed by using Matlab/Simulink. A 32-bit digital controller, “TMS320F 28335”, is used as the control core, and all the control strategies are accomplished by software programs in order to reduce circuit components. The physical circuits of converter and inverter are built and measured. The generator output is 1162.8 W with 1100.9 W transmitted to the power grid. The phase current total harmonic distortion of three-phase inverter is 8.07%. The overall efficiency of the boost converter and power inverter is 94.7%. The experimental results verify the feasibility of the proposed power conversion and its control strategy.

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