電流控制技術發展至今已研發出不同的控制方法，如滯環電流控制、直交軸解耦合控制、空間向量控制以及預測電流控制等，這些控制不外乎是為了獲得高品質的電流響應。常規的電壓源換流器控制系統中，一般採用雙環控制，即電壓外環與電流內環控制，良好的電流控制性能將影響電壓外環的控制性能。
本論文提出以非模型化電流預測控制當作電流控制環，在保留電壓控制環的情況下，減少系統參數(電阻、電感)對電流控制的影響，並取代脈波寬度調變產生器，用一個簡單的成本函數計算出開關狀態。
實驗方法除了利用PSCAD/EMTDC離線模擬以外，還利用LabVIEW當作控制器開發平台，並於即時數位模擬機RTDS中建構以電壓源換流器為基本架構的主動式電力濾波器與不平衡靜態同步補償器的硬體電路。將控制策略實現於離線模擬與線上模擬，相互比較與討論。

There have been many current control strategies developed so far. They include hysteresis current control, decoupled dq frame current control, space vector current control, and predictive current control. The purpose of these control strategies is to get high-quality current response. Generally, the controllers of voltage source converters usually employ dual-loop control, strategies which include outer voltage control loop and inner current control loop. Inner current controllers can affect the performance of the outer voltage controller.
This thesis proposes a model-free predictive current control (MFPCC) as the inner current control loop to reduce the impact of the system parameters (i.e. resistance and inductance), and replace the traditional pulse width modulator with a simple optimization function to determine the appropriate switching states.
The proposed control strategy is applied for an active filter and a Static Synchronous Compensator (STATCOM) to filter harmonies and to balance the voltage of the point of common coupling respectively. The results have been both verified a by offline simulation with PSCAD/EMTDC and by hardware-in-the-loop simulation with Real Time Digital Simulator (RTDS).
Compared to the results of the traditional MFPCC, the proposed method yields superior performance.

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