本文旨在研製主動式電力濾波器，用於改善市電併聯型變流器輸出電流失真之問題，將其修正為正弦波形電流，使得電能透過變壓器饋入電網時的傳輸效率可以提升。主動式電力濾波器採用全橋電路架構，透過設計控制系統達成電流失真成分偵測，並產生一補償電流命令，對實際補償電流進行回授控制。本文使用三角波比較控制法，改變主動式電力濾波器之操作狀態，達到修正電流功能。此外，利用系統所產生的單位正弦參考訊號，使修正後之電流能與市電電壓具有相同頻率與相位。最後使用電路模擬軟體PSIM完成系統模擬，並實作實體電路，完成具電流修正能力之主動式電力濾波器，驗證本文之可行性。

The purpose of this thesis is to implement the active power filter which can correct the output current of the grid-connected inverter. In order to mitigate the distortion and improve the efficiency of power transmission, the current fed to the grid should be corrected into a sinusoidal waveform. The circuit of the active power filter is using single phase full-bridge structure. The distortion component of current will be detected by the designed control system to obtain the compensation current command. The current closed-loop control scheme includes PI-controller and triangular carrier control, and the operating stage of active power filter will be changed to get the appropriate compensation current. The control circuit also generates a unity sinusoidal reference signal to make the corrected current to be inphase with mains voltage. The proposed active power filter is simulated by PSIM. A prototype circuit is implemented to show the effect of current correction.

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