Model Predictive Control of Uninterruptible Power Supply with Robust Disturbance Observer


Creative Commons License

Danayiyen Y., Lee K., Choı M., Lee Y. I.

ENERGIES, cilt.12, sa.15, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 12 Sayı: 15
  • Basım Tarihi: 2019
  • Doi Numarası: 10.3390/en12152871
  • Dergi Adı: ENERGIES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED)
  • Anahtar Kelimeler: model predictive control (MPC), robust disturbance observer, optimal voltage control, three-phase inverter, uninterruptible power supplies (UPS), DEADBEAT CONTROL, UPS, INVERTER
  • Karadeniz Teknik Üniversitesi Adresli: Evet

Özet

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.