Thermal and Efficiency Analysis of Five-Level Multilevel-Clamped Multilevel Converter Considering Grid Codes

Ke Ma, R. S. Muñoz-Aguilar, Pedro Rodriguez, Frede Blaabjerg

Research output: Contribution to journalJournal articleResearchpeer-review

11 Citations (Scopus)

Abstract

In this paper, a five-level multilevel-clamped multilevel converter (5L- MLC2) topology is analyzed based on a typical grid integration application for renewable energy system. The loss and thermal distributions of the power devices in different switching legs are investigated and illustrated under rated condition. Afterward, a loss and efficiency evaluation method is proposed and applied which takes into account various injected reactive power ranges regulated by the grid codes. It is concluded that the loss and thermal distributions of the 5L- MLC2 multilevel topology are unequal between the clamping switching legs and the main switching legs; it also shows a good and consistent efficiency characteristic under different output power ranges when complying with the grid codes.
Original languageEnglish
JournalIEEE Transactions on Industry Applications
Volume50
Issue number1
Pages (from-to)415-423
Number of pages9
ISSN0093-9994
DOIs
Publication statusPublished - Jan 2014

Keywords

  • DC-AC power convertors
  • Reactive power
  • 5L- MLC2 topology
  • Multilevel clamped converter

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