Active capacitor voltage control of flying capacitor multilevel converters

L. Xu, V.G. Agelidis

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

A novel control strategy for voltage balancing of flying capacitor multilevel converters controlled with phase shifted SPWM is presented. Based on the polarity of the phase current, a relatively small square wave is added to the nominal modulation signals (typically sinusoidal) controlling the converter switches and in this way the flying capacitor voltages can be directly regulated. A simple algorithm is developed to explore an optimal solution for multiple capacitor voltage regulation. The impact of the proposed control strategy on the flying capacitor voltage variation and converter output voltage is analysed. The effectiveness of the control strategy is validated by simulation results of a five-level converter.
LanguageEnglish
Pages313-321
Number of pages8
JournalIEE Proceedings Electric Power Applications
Volume151
Issue number3
DOIs
Publication statusPublished - 8 May 2004

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Voltage control
Capacitors
Electric potential
Switches
Modulation

Keywords

  • PWM power convertors
  • power capacitors
  • voltage control
  • flying capacitor

Cite this

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title = "Active capacitor voltage control of flying capacitor multilevel converters",
abstract = "A novel control strategy for voltage balancing of flying capacitor multilevel converters controlled with phase shifted SPWM is presented. Based on the polarity of the phase current, a relatively small square wave is added to the nominal modulation signals (typically sinusoidal) controlling the converter switches and in this way the flying capacitor voltages can be directly regulated. A simple algorithm is developed to explore an optimal solution for multiple capacitor voltage regulation. The impact of the proposed control strategy on the flying capacitor voltage variation and converter output voltage is analysed. The effectiveness of the control strategy is validated by simulation results of a five-level converter.",
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Active capacitor voltage control of flying capacitor multilevel converters. / Xu, L.; Agelidis, V.G.

In: IEE Proceedings Electric Power Applications, Vol. 151, No. 3, 08.05.2004, p. 313-321.

Research output: Contribution to journalArticle

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AU - Agelidis, V.G.

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AB - A novel control strategy for voltage balancing of flying capacitor multilevel converters controlled with phase shifted SPWM is presented. Based on the polarity of the phase current, a relatively small square wave is added to the nominal modulation signals (typically sinusoidal) controlling the converter switches and in this way the flying capacitor voltages can be directly regulated. A simple algorithm is developed to explore an optimal solution for multiple capacitor voltage regulation. The impact of the proposed control strategy on the flying capacitor voltage variation and converter output voltage is analysed. The effectiveness of the control strategy is validated by simulation results of a five-level converter.

KW - PWM power convertors

KW - power capacitors

KW - voltage control

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T2 - IEE Proceedings Electric Power Applications

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