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Weight factor selection for model-based predictive control of a four-level flying-capacitor inverter

Steven Thielemans UGent, Thomas Vyncke UGent and Jan Melkebeek UGent (2012) IET POWER ELECTRONICS. 5(3). p.323-333
abstract
Flying-capacitor (FC) converters need, besides an output current control, a control of the FC voltages to be able to produce appropriate output voltage levels. The output currents and capacitor voltages can be actively controlled by model-based predictive control (MBPC). This MBPC has several control parameters such as weight factors in the cost function. The selection of these weight factors and other control parameters of MBPC is not trivial and needs an objective criterion. A method using mean square error (MSE) values of the controlled variables is proposed. The feasibility of the MBPC and the MSE analysis method for multilevel inverters is demonstrated by experiments. The good correspondence between simulations and experiments clearly shows that the results from a design analysis of MBPC in simulation is applicable on the practical setup. Two models in the prediction step of the MBPC are discussed in this study: using a simplified model, where the star-point voltage is neglected, and using an unsimplified model. The simplification, although reducing the computational requirements, results in suboptimal control quality and more importantly a less robust control. The experiments validate the conclusion that using the unsimplified model extends the range of good weight factors and improves the control quality of the current and capacitor voltages.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
MULTILEVEL CONVERTERS, weight factor selection, POWER CONVERTERS, MODULATION, VOLTAGES
journal title
IET POWER ELECTRONICS
IET Power Electron.
volume
5
issue
3
pages
323 - 333
Web of Science type
Article
Web of Science id
000310757500005
JCR category
ENGINEERING, ELECTRICAL & ELECTRONIC
JCR impact factor
1.519 (2012)
JCR rank
83/242 (2012)
JCR quartile
2 (2012)
ISSN
1755-4535
DOI
10.1049/iet-pel.2011.0040
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
2075619
handle
http://hdl.handle.net/1854/LU-2075619
date created
2012-03-27 22:40:35
date last changed
2014-04-17 12:12:52
@article{2075619,
  abstract     = {Flying-capacitor (FC) converters need, besides an output current control, a control of the FC voltages to be able to produce appropriate output voltage levels. The output currents and capacitor voltages can be actively controlled by model-based predictive control (MBPC). This MBPC has several control parameters such as weight factors in the cost function. The selection of these weight factors and other control parameters of MBPC is not trivial and needs an objective criterion. A method using mean square error (MSE) values of the controlled variables is proposed. The feasibility of the MBPC and the MSE analysis method for multilevel inverters is demonstrated by experiments. The good correspondence between simulations and experiments clearly shows that the results from a design analysis of MBPC in simulation is applicable on the practical setup. Two models in the prediction step of the MBPC are discussed in this study: using a simplified model, where the star-point voltage is neglected, and using an unsimplified model. The simplification, although reducing the computational requirements, results in suboptimal control quality and more importantly a less robust control. The experiments validate the conclusion that using the unsimplified model extends the range of good weight factors and improves the control quality of the current and capacitor voltages.},
  author       = {Thielemans, Steven and Vyncke, Thomas and Melkebeek, Jan},
  issn         = {1755-4535},
  journal      = {IET POWER ELECTRONICS},
  keyword      = {MULTILEVEL CONVERTERS,weight factor selection,POWER CONVERTERS,MODULATION,VOLTAGES},
  language     = {eng},
  number       = {3},
  pages        = {323--333},
  title        = {Weight factor selection for model-based predictive control of a four-level flying-capacitor inverter},
  url          = {http://dx.doi.org/10.1049/iet-pel.2011.0040},
  volume       = {5},
  year         = {2012},
}

Chicago
Thielemans, Steven, Thomas Vyncke, and Jan Melkebeek. 2012. “Weight Factor Selection for Model-based Predictive Control of a Four-level Flying-capacitor Inverter.” Iet Power Electronics 5 (3): 323–333.
APA
Thielemans, S., Vyncke, T., & Melkebeek, J. (2012). Weight factor selection for model-based predictive control of a four-level flying-capacitor inverter. IET POWER ELECTRONICS, 5(3), 323–333.
Vancouver
1.
Thielemans S, Vyncke T, Melkebeek J. Weight factor selection for model-based predictive control of a four-level flying-capacitor inverter. IET POWER ELECTRONICS. 2012;5(3):323–33.
MLA
Thielemans, Steven, Thomas Vyncke, and Jan Melkebeek. “Weight Factor Selection for Model-based Predictive Control of a Four-level Flying-capacitor Inverter.” IET POWER ELECTRONICS 5.3 (2012): 323–333. Print.