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Improved natural balancing with modified phase shifted PWM for single-leg five-level flying-capacitor converters

Steven Thielemans UGent, Alex Ruderman, Boris Reznikov and Jan Melkebeek UGent (2012) IEEE TRANSACTIONS ON POWER ELECTRONICS. 27(4). p.1658-1667
abstract
Flying capacitor converters (FCCs), as most multilevel converter topologies, require a balancing mechanism of the capacitor voltages. FCCs have the valuable property of natural voltage balancing when a special modulation technique is used. The classic methods, like Phase-Shifted Pulse Width Modulation (PS-PWM), result in very slow balancing for some duty ratio ranges. Previous work showed that for a single-leg five-level FCC one time constant is infinite for a zero desired output voltage. In this paper, a modified PS-PWM scheme for a single-leg fivelevel FCC is presented which results in faster balancing over the total duty ratio range. The modified PS-PWM scheme is studied, resulting in an averaged voltage balancing model. This model is verified using simulations and experiments. The modified PS-PWM scheme solves the slow balancing problems of the normal PS-PWM method for odd-level FCCs, while maintaining the passive control property, and it provides a self-precharge capability.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
MODULATION, Capacitor voltage balancing, MULTICELL CONVERTERS, MULTILEVEL CONVERTERS, multilevel converters, power converters, pulse width modulation (PWM)
journal title
IEEE TRANSACTIONS ON POWER ELECTRONICS
IEEE Trans. Power Electron.
volume
27
issue
4
pages
1658 - 1667
Web of Science type
Article
Web of Science id
000300581500001
JCR category
ENGINEERING, ELECTRICAL & ELECTRONIC
JCR impact factor
4.08 (2012)
JCR rank
6/242 (2012)
JCR quartile
1 (2012)
ISSN
0885-8993
DOI
10.1109/TPEL.2011.2169993
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
1919670
handle
http://hdl.handle.net/1854/LU-1919670
date created
2011-10-03 14:20:28
date last changed
2012-03-28 15:21:26
@article{1919670,
  abstract     = {Flying capacitor converters (FCCs), as most multilevel converter topologies, require a balancing mechanism of the capacitor voltages. FCCs have the valuable property of natural voltage balancing when a special modulation technique is used. The classic methods, like Phase-Shifted Pulse Width Modulation (PS-PWM), result in very slow balancing for some duty ratio ranges. Previous work showed that for a single-leg five-level FCC one time constant is infinite for a zero desired output voltage. In this paper, a modified PS-PWM scheme for a single-leg fivelevel FCC is presented which results in faster balancing over the total duty ratio range. The modified PS-PWM scheme is studied, resulting in an averaged voltage balancing model. This model is verified using simulations and experiments. The modified PS-PWM scheme solves the slow balancing problems of the normal PS-PWM method for odd-level FCCs, while maintaining the passive control property, and it provides a self-precharge capability.},
  author       = {Thielemans, Steven and Ruderman, Alex and Reznikov, Boris and Melkebeek, Jan},
  issn         = {0885-8993},
  journal      = {IEEE TRANSACTIONS ON POWER ELECTRONICS},
  keyword      = {MODULATION,Capacitor voltage balancing,MULTICELL CONVERTERS,MULTILEVEL CONVERTERS,multilevel converters,power converters,pulse width modulation (PWM)},
  language     = {eng},
  number       = {4},
  pages        = {1658--1667},
  title        = {Improved natural balancing with modified phase shifted PWM for single-leg five-level flying-capacitor converters},
  url          = {http://dx.doi.org/10.1109/TPEL.2011.2169993},
  volume       = {27},
  year         = {2012},
}

Chicago
Thielemans, Steven, Alex Ruderman, Boris Reznikov, and Jan Melkebeek. 2012. “Improved Natural Balancing with Modified Phase Shifted PWM for Single-leg Five-level Flying-capacitor Converters.” Ieee Transactions on Power Electronics 27 (4): 1658–1667.
APA
Thielemans, S., Ruderman, A., Reznikov, B., & Melkebeek, J. (2012). Improved natural balancing with modified phase shifted PWM for single-leg five-level flying-capacitor converters. IEEE TRANSACTIONS ON POWER ELECTRONICS, 27(4), 1658–1667.
Vancouver
1.
Thielemans S, Ruderman A, Reznikov B, Melkebeek J. Improved natural balancing with modified phase shifted PWM for single-leg five-level flying-capacitor converters. IEEE TRANSACTIONS ON POWER ELECTRONICS. 2012;27(4):1658–67.
MLA
Thielemans, Steven, Alex Ruderman, Boris Reznikov, et al. “Improved Natural Balancing with Modified Phase Shifted PWM for Single-leg Five-level Flying-capacitor Converters.” IEEE TRANSACTIONS ON POWER ELECTRONICS 27.4 (2012): 1658–1667. Print.