Model Predictive Control of Uninterruptible Power Supply with Robust Disturbance Observer

Yahya Danayiyen, Kyungsuk Lee, Minho Choi and Young Il Lee
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Yahya Danayiyen: Department of Electrical and Electronics Engineering, Karadeniz Technical University, Trabzon 61080, Turkey
Kyungsuk Lee: Department of Electrical and Information Engineering, RCEIT, Seoul National University of Science and Technology, Seoul 01811, Korea
Minho Choi: Department of Electrical and Information Engineering, RCEIT, Seoul National University of Science and Technology, Seoul 01811, Korea
Young Il Lee: Department of Electrical and Information Engineering, RCEIT, Seoul National University of Science and Technology, Seoul 01811, Korea

Energies, 2019, vol. 12, issue 15, 1-22

Abstract: This paper presents a robust continuous control set model predictive control (CCS-MPC) method to control the output voltage of a three-phase inverter in uninterruptible power supplies (UPS). A robust disturbance observer (DOB) is proposed to estimate the load current of the three-phase UPS without a steady-state error, taking the effect of model uncertainties into account. A CCS-MPC is designed using the DOB for reference voltage tracking purpose, and input constraints are considered in the controller design to calculate the optimal control input. Model uncertainties are defined using polytopic uncertainty class, and a linear matrix inequality (LMI) optimization method is used to compute the optimal observer gain matrix. Another robust controller (RC) is designed based on the DOB and compared with CCS-MPC. The effectiveness of the proposed method (the DOB based CCS-MPC) is evaluated for resistive, inductive, and nonlinear loads then compared with other control methods using a three-phase 5-KVA laboratory experiment UPS system.

Keywords: model predictive control (MPC), robust disturbance observer; optimal voltage control; three-phase inverter; uninterruptible power supplies (UPS) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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