Capacitor voltage balance limits in a multilevel-converter-based energy storage system

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Document typeConference report
Defense date2011
Rights accessOpen Access
Abstract
This paper studies an energy storage system based on a three-level DC-DC converter and a gridconnected
neutral-point-clamped inverter. The main advantages of this multilevel power conversion
system are highlighted and the neutral-point voltage oscillations are analyzed. A modulation algorithm
for the DC-DC converter which includes the neutral-point voltage balance control is used to improve
the voltage balancing capabilities of the inverter. Some figures are presented to show the extended
operating areas without neutral-point voltage oscillations thanks to the contribution of the DC-DC
converter to the voltage balance. Finally, some guidelines to size the DC-link capacitors are given for
a practical application.
CitationBurusteta, S. [et al.]. Capacitor voltage balance limits in a multilevel-converter-based energy storage system. A: European Conference on Power Electronics and Applications. "Proceedings of the 2011 14th European Conference on Power Electronics and Applications". Birminghan: 2011, p. 3360-3368.
ISBN9781612841670
Publisher versionhttp://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6020507
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