Stabilization of the DC-link voltage in a two stage cascaded H-Bridge multilevel converter for battery energy storage systems

Taha Lahlou, Daniel Wittmann, Mohamed Abdelrahem, Hans Georg Herzog

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

10 Scopus citations

Abstract

Multilevel converters and battery energy storage systems are key components in present and future medium and low voltage grids. Cascaded H-bridge multilevel converters offer the capability of embedding such energy storage units in a split manner, given the existence of several submodules operating at lower voltages. This paper presents a two stage cascaded multilevel converter with bidirectional buck/boost DC-DC converters as a charge/discharge unit for energy storage applications. A control algorithm for the DC-DC converters is proposed for balancing the batteries state of charges and reducing the DC-link voltage fluctuation under all operation conditions. Moreover, a vector control system is proposed for regulating the active and reactive power exchange between the grid and the cascaded multilevel converter. The performance of the proposed system is illustrated via simulation results.

Original languageEnglish
Title of host publication2016 IEEE International Energy Conference, ENERGYCON 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781467384636
DOIs
StatePublished - 14 Jul 2016
Event2016 IEEE International Energy Conference, ENERGYCON 2016 - Leuven, Belgium
Duration: 4 Apr 20168 Apr 2016

Publication series

Name2016 IEEE International Energy Conference, ENERGYCON 2016

Conference

Conference2016 IEEE International Energy Conference, ENERGYCON 2016
Country/TerritoryBelgium
CityLeuven
Period4/04/168/04/16

Keywords

  • battery energy storage system
  • bidirectional DC-DC converter
  • cascaded multilevel converter
  • CHB
  • DC-link voltage control
  • vector control

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