主動式電力濾波器電流控制技術至今已研發出許多不同控制方法，如：直交軸解耦合控制、滯環控制、預測電流控制等，對於傳統比例積分控制模型是假設在開關頻率極高的情況，高開關切換頻率下傳統比例積分控制方法可有效的補償，然而在大功率系統下為了減少開關切換的損失，必需運行在開關切換頻率極低的情況，將造成傳統控制手法產生明顯的穩態誤差，影響電流補償的成效。
本論文提出結合電路模型之擬似牛頓控制手法，取代傳統比例積分控制，其優勢為可操作在開關頻率極低的情況下，如此可大幅減少開關切換所產生的熱能損失，進而達到減小體積、延長元件壽命、降低維護成本與提高效率之目的。本論文透過電磁暫態分析軟體(PSCAD/EMTDC)模擬與實際硬體測試，驗證提出方法的可行性。

Many methods have been proposed in the current control systems of active power filters such as decoupled d-q frame control, hysteresis control, predictive control, etc. Traditional decoupled d-q frame control method can effectively compensate harmonic in the high switch frequency. But in order to reduce the switching power loss at low switching frequency in ultra-high power system. Traditional control method may result in significant steady-state error and affect the effectiveness of current compensation.
This thesis proposes a control method base on Quasi Newton method is more suitable to be used that in a ultra-high power system. The proposed control method can effectively compensate the current harmonic at extremely low switching frequency, which can significantly reduce the heat generated by the switching losses. Thus, it can greatly improve the system efficiency, reduce component size, and extend the component life time. The results have been both verified a by offline simulation with PSCAD/EMTDC and by experiment.

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