Title :
Improved control scheme for three phase PWM AC/DC converter under unbalanced voltage dips conditions
Author :
Roiu, D. ; Bojoi, R. ; Griva, G.
Author_Institution :
Dipt. di Ing. Elettr., Politec. di Torino, Turin
Abstract :
An improved control scheme for three-phase pulse width modulation (PWM) AC/DC converter under unbalanced-voltage dips operating conditions is proposed in this paper. The proposed control scheme uses Proportional - sinusoidal signal integrators (P-SSI) controllers for simultaneous compensation of both positive and negative current sequence components, with a new current-reference calculation in stationary reference frame. As consequence, phase locked loop (PLL) schemes are not required. This control scheme achieves good dynamic performance with ripple free dc link voltage and input sinusoidal currents under voltage dips operating conditions. The effectiveness of the proposed control scheme is demonstrated through simulation results.
Keywords :
AC-DC power convertors; PWM power convertors; phase locked loops; proportional control; current-reference calculation; input sinusoidal currents; negative current sequence components; phase locked loop schemes; positive current sequence components; proportional sinusoidal signal integrators controllers; pulse width modulation converter; ripple free DC link voltage; stationary reference frame; three phase PWM AC-DC converter; unbalanced voltage dips conditions; Active filters; DC-DC power converters; Phase locked loops; Power harmonic filters; Power system harmonics; Proportional control; Pulse width modulation; Pulse width modulation converters; Voltage control; Voltage fluctuations; AC/DC converter; Proportional - Sinusoidal Signal Integrators; voltage dips;
Conference_Titel :
Optimization of Electrical and Electronic Equipment, 2008. OPTIM 2008. 11th International Conference on
Conference_Location :
Brasov
Print_ISBN :
978-1-4244-1544-1
Electronic_ISBN :
978-1-4244-1545-8
DOI :
10.1109/OPTIM.2008.4602401
