DocumentCode :
3020756
Title :
A robust model reference adaptive controller for UPS applications
Author :
Gründling, Hilton A. ; Carati, Emerson G. ; Pinheiro, José R.
Author_Institution :
Univ. Federal de Santa Maria, Brazil
Volume :
2
fYear :
1997
fDate :
9-14 Nov 1997
Firstpage :
901
Abstract :
A novel robust control approach to obtain a nearly sinusoidal PWM inverter output voltage for a single-phase uninterruptible power supply (UPS) has been investigated. In the proposed scheme, a voltage source inverter and its corresponding RLC load-filter are controlled, based on the robust model reference adaptive control (RMRAC). Different to the other presented control strategies, such as dead-beat, one sampling ahead preview (OSAP) and adaptive repetitive controller, this scheme is able to compensate unfavorable errors, switching cyclic fluctuating loads and also unmodeled dynamics loads. An on-line adaptive learning algorithm is described which guarantees steady-state controller stability. The principles, stability, robustness, and special features of the control scheme are discussed and the UPS system is presented. Experimental results are presented to verify the feasibility and performance of the proposed approach
Keywords :
PWM invertors; model reference adaptive control systems; robust control; switching; uninterruptible power supplies; PWM inverter; RLC load-filter; UPS applications; nearly sinusoidal output voltage; on-line adaptive learning algorithm; robust model reference adaptive controller; single-phase uninterruptible power supply; steady-state controller stability; switching cyclic fluctuating loads; unfavorable errors compensation; unmodeled dynamics loads; voltage source inverter; Adaptive control; Error correction; Programmable control; Pulse width modulation inverters; Robust control; Robust stability; Sampling methods; Steady-state; Uninterruptible power systems; Voltage control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industrial Electronics, Control and Instrumentation, 1997. IECON 97. 23rd International Conference on
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-3932-0
Type :
conf
DOI :
10.1109/IECON.1997.672109
Filename :
672109
Link To Document :
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