A robust high performance three-phase uninterruptible power supply

Author

Carati, Emerson Giovani ; Richter, Carlos Mendes ; Grundling, Hilton A.

Author_Institution

UFSM/CT/DELC/NUPEDEE, Santa Maria, Brazil

fYear

2000

fDate

2000

Firstpage

896

Lastpage

901

Abstract

High power converters, such as three-phase inverters, usually operate at low frequencies due to the switching losses. Besides, modeling errors and non-linear loads with unmodeled dynamics can degrade the controller performance resulting in a poor transient response and instability. A robust model reference adaptive controller (RMRAC) for three-phase uninterruptible power supplies (UPS) is presented. The three-phase system model is rewritten, using a synchronous transformation in dq coordinates, and a RMRAC controller is used to assure system robustness and performance. Simulation and experimental results are used to show the closed-loop system robustness and performance under several operation conditions

Keywords

closed loop systems; invertors; least squares approximations; model reference adaptive control systems; recursive estimation; robust control; uninterruptible power supplies; high power converters; instability; poor transient response; robust high performance three-phase uninterruptible power supply; robust model reference adaptive controller; synchronous transformation; three-phase inverters; Error correction; Frequency conversion; Inverters; Nonlinear dynamical systems; Power system modeling; Robust control; Robustness; Switching converters; Switching loss; Uninterruptible power systems;

fLanguage

English

Publisher

ieee

Conference_Titel

Control Applications, 2000. Proceedings of the 2000 IEEE International Conference on

Conference_Location

Anchorage, AK

Print_ISBN

0-7803-6562-3

Type

conf

DOI

10.1109/CCA.2000.897558

Filename

897558