Title :
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
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;
Conference_Titel :
Control Applications, 2000. Proceedings of the 2000 IEEE International Conference on
Conference_Location :
Anchorage, AK
Print_ISBN :
0-7803-6562-3
DOI :
10.1109/CCA.2000.897558
