TY - JOUR
T1 - Active Voltage-Ripple Compensation in an Integrated Generator-Rectifier System
AU - Huynh, Phuc
AU - Banerjee, Arijit
N1 - Manuscript received January 6, 2020; revised March 30, 2020 and June 9, 2020; accepted June 25, 2020. Date of publication July 2, 2020; date of current version September 22, 2020. This work was supported in part by the Advanced Research Projects Agency-Energy, U.S. Department of Energy under Award DE-AR0001057 and in part by the Grainger Center for Electric Machinery and Electromechanics. This paper was presented in part at the Applied Power Electronics Conference, Anaheim, CA, USA, Mar. 2019. Recommended for publication by Associate Editor H. Hofmann. (Corresponding author: Phuc Huynh.) The authors are with the Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801 USA (e-mail: pthuynh2@ illinois.edu; [email protected]).
PY - 2021/2
Y1 - 2021/2
N2 - An integrated generator-rectifier system can produce high conversion efficiency and reduce the size of the active rectifier in high-power ac-to-dc conversion. A major disadvantage of this system is the use of bulky filter capacitors with passive rectifiers to obtain a low voltage-ripple dc bus. These filters are the main contributor to the overall system size, weight, cost, and failure, as well as to the low power factor at the ac ports powering the passive rectifiers. This article presents an alternative approach: integrating the function of the filter elements into the active rectifier. A voltage opposite the passive-rectifier ripple component is synthesized at the active-rectifier dc-side by modulating the ac-side current. Compensation occurs due to the series connection of the rectifier dc outputs. In addition, an overall control architecture is proposed to use the active rectifier both as a filter element and a dc-bus voltage regulator. Simulation on a 3-MW, 4.9-kV dc system shows the total dc-bus-voltage ripple factor is reduced by 57%, while the power factor at the passive-rectifier ac sides is 0.95. The proposed control architecture achieves regulation of the dc-bus voltage at variable dc-bus current and variable generator speed conditions. Experimental results corroborate the findings.
AB - An integrated generator-rectifier system can produce high conversion efficiency and reduce the size of the active rectifier in high-power ac-to-dc conversion. A major disadvantage of this system is the use of bulky filter capacitors with passive rectifiers to obtain a low voltage-ripple dc bus. These filters are the main contributor to the overall system size, weight, cost, and failure, as well as to the low power factor at the ac ports powering the passive rectifiers. This article presents an alternative approach: integrating the function of the filter elements into the active rectifier. A voltage opposite the passive-rectifier ripple component is synthesized at the active-rectifier dc-side by modulating the ac-side current. Compensation occurs due to the series connection of the rectifier dc outputs. In addition, an overall control architecture is proposed to use the active rectifier both as a filter element and a dc-bus voltage regulator. Simulation on a 3-MW, 4.9-kV dc system shows the total dc-bus-voltage ripple factor is reduced by 57%, while the power factor at the passive-rectifier ac sides is 0.95. The proposed control architecture achieves regulation of the dc-bus voltage at variable dc-bus current and variable generator speed conditions. Experimental results corroborate the findings.
KW - AC-DC power conversion
KW - dc power systems
KW - power conversion
KW - rectifiers
UR - https://www.scopus.com/pages/publications/85092555143
UR - https://www.scopus.com/pages/publications/85092555143#tab=citedBy
U2 - 10.1109/TPEL.2020.3006510
DO - 10.1109/TPEL.2020.3006510
M3 - Article
AN - SCOPUS:85092555143
SN - 0885-8993
VL - 36
SP - 2270
EP - 2282
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
IS - 2
M1 - 9132637
ER -