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Active capacitor voltage control of flying capacitor multilevel converters

Xu, L. and Agelidis, V.G. (2004) Active capacitor voltage control of flying capacitor multilevel converters. IEE Proceedings Electric Power Applications, 151 (3). pp. 313-321. ISSN 1350-2352

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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.

Item type: Article
ID code: 39095
Keywords: PWM power convertors, power capacitors, voltage control, flying capacitor, Electrical engineering. Electronics Nuclear engineering, Electrical and Electronic Engineering
Subjects: Technology > Electrical engineering. Electronics Nuclear engineering
Department: Faculty of Engineering > Electronic and Electrical Engineering
Related URLs:
    Depositing user: Pure Administrator
    Date Deposited: 11 Apr 2012 15:47
    Last modified: 04 Sep 2014 21:49
    URI: http://strathprints.strath.ac.uk/id/eprint/39095

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