本文旨在研製三相永磁式同步發電機功率控制系統，並將功率饋入市電。在發電機側採用轉速發電機作轉速回授與角位置的估測，並結合轉子座標系統轉換，以完成永磁式同步發電機的功率控制;而在三相市電方面，則回授市電電壓並利用數位鎖相迴路以估測市電相電壓角位置，俾用於同步旋轉座標系統轉換，完成將功率饋入市電及穩定直流鏈電壓。
本文已完成系統之實體製作，輸出功率為1kW，直流鏈電壓為360V，市電側的功因數接近1.0，系統整體效率為92%。整個系統共有二組三相功率轉換器，分別置於三相永磁式同步發電機輸出端及三相市電側。前者採用交流-直流功率控制，而後者之直流-交流功率轉換器則採直流鏈電壓控制策略，每組三相功率轉換器皆由個別數位控制器完成，並以C語言撰寫完成。系統以Matlab/simulink進行控制策略模擬，並作性能評估。最後，再由實測驗證系統的可行性。

This thesis aims to develop a three phase permanent-magnet synchronous generator (PMSG) power control system. A generator is used to estimate the speed and rotor position to facilitate coordinate transformation for the power control of PMSG. Whereas on the grid side, grid voltage is fed to digital phase-locked loop to estimate the required phase angle of the grid voltage for frame transform to feed the power into the grid and stabilize the dc-voltage.
An experimental system is built to yield the dc-link voltage of 360V for the output power of 1kW with unity grid power factor and 90% system efficiency. The whole system contains a rectifier and an inverter, which are placed between PMSG and the grid. Power as well as dc-voltage control strategies are conducted for the rectifier and the inverter, respectively, with each three phase power converter controlled by its own digital controller using C language. The system is simulated by Matlab/Simulink. Finally the feasibility of the system is confirmed by experiment.

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