Title :
A novel feedback-based control for PWM AC/DC converters under unbalanced grid conditions
Author :
Dang, Pengpai ; Petzoldt, Jürgen
Author_Institution :
Dept. of Power Electron. & Control, Tech. Univ. Ilmenau, Ilmenau, Germany
Abstract :
Under unbalanced grid conditions low order harmonic appears both at the DC output and AC inputs of the converter. Such harmonics lead to deterioration of performance of the system. This paper presents a novel feedback-based controller, which regulates directly converter voltages to eliminate of the 2nd ripple of DC link voltage to alleviate the stress of DC-link capacitor and to reduce the 3rd harmonic of input AC currents. The results show excellent response and stable operation of the PWM converter using the proposed novel control method.
Keywords :
AC-DC power convertors; PWM power convertors; feedback; power capacitors; power grids; voltage control; DC link capacitor; DC link voltage; PWM AC-DC converters; converter voltage regulation; feedback-based control; low order harmonics; unbalanced grid condition; Converters; Equations; Harmonic analysis; Mathematical model; Pi control; Pulse width modulation; Voltage control; Control of Power Converter; Power Converter; Simulation;
Conference_Titel :
Power Electronics and Motion Control Conference (EPE/PEMC), 2010 14th International
Conference_Location :
Ohrid
Print_ISBN :
978-1-4244-7856-9
DOI :
10.1109/EPEPEMC.2010.5606785
