DocumentCode :
391508
Title :
A new multiple-loops control scheme for a three-phase/switch/level PWM rectifier based on the input/output feedback linearization technique
Author :
Kanaan, Hadi Youssef ; Al-Haddad, Kamal
Author_Institution :
St-Joseph Univ., Lebanon
Volume :
2
fYear :
2002
fDate :
5-8 Nov. 2002
Firstpage :
1404
Abstract :
In this paper, a new nonlinear control system is developed and applied to a three-phase, three-switch, three-level AC-to-DC converter. The derivation of the proposed control law is based on a fourth-order low-frequency time-invariant nonlinear state model of the converter. This mathematical model, expressed in a rotating frame, is obtained using averaging techniques over a double time base. The proposed control law is designed on the basis of a multiple-loops control strategy, where an exact input-output feedback linearization is applied to the inner and outer loops. The regulators are designed in order to ensure the shaping of the line-currents, the regulation of the DC output voltage and the compensation of the DC load unbalance. The performances of the proposed control law in steady state and transient regimes are then analyzed by numerical simulations. In this purpose, a digital version of the converter is implemented in the Matlab/Simulink framework, using the switching function approach. The obtained simulation results show a nearly zero current harmonic distortion, a unity displacement factor, a low output voltage ripple, and a high robustness to DC load unbalance.
Keywords :
AC-DC power convertors; MIMO systems; PWM power convertors; electric current control; feedback; linearisation techniques; nonlinear control systems; rectifying circuits; switching convertors; voltage control; DC load unbalance compensation; MIMO; Matlab/Simulink; averaging techniques; double time base; exact input-output feedback linearization; fourth-order low-frequency time-invariant nonlinear state model; high robustness; inner loop; input/output feedback linearization technique; line-currents shaping; low output voltage ripple; mathematical model; multiple-loops control scheme; multiple-loops control strategy; nearly zero current harmonic distortion; nonlinear control system; numerical simulation; outer loop; regulators design; rotating frame; steady state; switching function; three-phase three-switch three-level AC-to-DC converter; three-phase/switch/level PWM rectifier; transient regime; unity displacement factor; Feedback loop; Linear feedback control systems; Linearization techniques; Mathematical model; Nonlinear control systems; Output feedback; Pulse width modulation; Rectifiers; Regulators; Switches;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
IECON 02 [Industrial Electronics Society, IEEE 2002 28th Annual Conference of the]
Print_ISBN :
0-7803-7474-6
Type :
conf
DOI :
10.1109/IECON.2002.1185483
Filename :
1185483
Link To Document :
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