本論文主旨在研製一二相並聯型主動式電力濾波器，使用Le- Blanc接線變壓器將三相電源轉換成二相電源。二相並聯型主動式電力濾波器的控制目標包含消除線路電流諧波、改善系統功率因數及平衡二相電源的負載電流。本論文以數位訊號處理器TMS320F2812作為整個系統的控制器核心，並使用一些不平衡非線性負載進行實測。藉由感測電壓、電流訊號，使用DSP控制器計算出二相電源之補償電流，並以磁滯電流控制法決定開關切換模式。本論文使用的非線性負載為單相半橋轉換器，而台灣大部份的電氣機車使用此轉換器作為第一級電力整流電路。本論文針對此種負載，提出一前饋補償方法，用以改善所提二相主動式電力濾波器在電氣機車加速及減速期間之暫態響應。模擬與實驗的結果均證實，本文所提出之理論及系統架構確實具有可行性。

The subject of this thesis is to implement a two-phase active power filter (APF) which employed Le Blanc connection transformer to transfer a three-phase source to a two-phase source. The control goals of the APF include eliminating harmonics in the line current, improving power factor of the system, and balancing the load currents of the two-phase source. TMS320F2812 is used as the core controller and some unbalanced nonlinear load are used in this thesis. By sensing the voltage and current signals, the DSP controller calculates the compensation currents for the two-phase source, and then determines the switching patterns with the hysteresis method. The single-phase semi-converter, which is the front power stage of most electric locomotive in Taiwan, is used as the nonlinear load in the proposed system. To deal with this kind of load, this thesis proposes a feedforward compensation that can improve the transient response of the APF during the accelerating and decelerating periods of the electric locomotives. Both simulation and experimental results show the effectiveness of the proposed system.

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