Seok-Kyoon Kim, Dae-Keun Choi, Kyo-Beum Lee, and Young Il Lee, "Offset-Free Model Predictive Control for the Power Control of Three-Phase AC/DC Converters," IEEE Transactions on Industrial Electronics, vol. 62, no. 11, pp. 7114–7126, Nov. 2015. -SCI > Paper

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Paper

International Journals Seok-Kyoon Kim, Dae-Keun Choi, Kyo-Beum Lee, and Young Il Lee, "Offset-Free Model Predictive Control for the Power Control of Three-Phase AC/DC Converters," IEEE Transactions on Industrial Electronics, vol. 62, no. 11, pp. 7114–7126, Nov. 2015. -SCI

2015

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This paper describes an offset-free model predictive control (MPC) algorithm using a disturbance observer (DOB) to control the

active/reactive powers of a three-phase ac/dc converter. The strategy of this paper is twofold. One is the use of DOB to remove the

offset error, and the other is the proper choice of the weighting matrices of a cost index to provide fast error decay with small

overshoot. The DOB is designed to estimate the unknown disturbances of the ac/dc converter following the standard Luenberger

observer design procedure. The proposed MPC minimizes a one-step-ahead cost index penalizing the predicted tracking error by

performing a simple membership test without any use of numerical methods. A systematic way for choosing the weights of the cost

index, which guarantees the global stability of the closed-loop system, is proposed. Use of the DOB eliminates the offset tracking

errors in the real implementation. Using a 25-kW ac/dc converter, it is experimentally shown that the proposed MPC enhances the

power tracking performance while considerably reducing the mutual interference of the active/reactive powers as well as the output

voltage. 

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