Modular Multilevel Series/Parallel Converter with Switched-Inductor Energy Transfer between Modules

Ricardo Lizana F., Sebastian Rivera, Zhongxi Li, Jenny Luo, Angel V. Peterchev, Stefan M. Goetz

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

This paper presents a modular multilevel series/parallel converter (MMSPC) with intermodule switched-inductor power transfer. The switched-inductor voltage conversion feature allows controllable and efficient transfer of energy between modules with nonnegligible voltage difference, providing both step-down and step-up functionalities. Thus, this converter can accurately control and rapidly adjust the voltage of each module to generate an ac output voltage waveform with a controllable number of levels, increasing the quality of the output. Moreover, the intrinsic DC-DC conversion feature can generate a dc controllable output voltage and enable new applications. In this text, we specifically demonstrate how the flexibility of obtaining both ac and dc output with the same setup renders the topology promising for battery energy storage systems and dc microgrid applications. Experimental results validate the topology and concept of an MMSPC with intrinsic switched-inductor conversion.

Original languageEnglish
Article number8419277
Pages (from-to)4844-4852
Number of pages9
JournalIEEE Transactions on Power Electronics
Volume34
Issue number5
DOIs
StatePublished - May 2019

Bibliographical note

Funding Information:
This work was supported in part by the National Science Foundation No. 1608929, in part by the North Carolina Biotechnology Center No. 2016-CFG-8004, in part by a seed grant from the Duke University Energy Initiative, in part by the FONDECYT Iniciacion under Grant No. 11160227, in part by the AC3E (CONICYT/Basal/FB0008), and in part by SERC Chile (CONICYT/FONDAP/15110019).

Funding Information:
Manuscript received March 2, 2018; revised June 4, 2018; accepted July 10, 2018. Date of publication July 24, 2018; date of current version March 29, 2019. This work was supported in part by the National Science Foundation No. 1608929, in part by the North Carolina Biotechnology Center No. 2016-CFG-8004, in part by a seed grant from the Duke University Energy Initiative, in part by the FONDECYT Iniciacion under Grant No. 11160227, in part by the AC3E (CONICYT/Basal/FB0008), and in part by SERC Chile (CONICYT/FONDAP/15110019). Recommended for publication by Associate Editor R. Zargari. (Corresponding author: Ricardo Lizana.) R. Lizana is with the Department of Environment and Energy, Universidad Catolica de la Santisima Concepcion, Concepcion 4090541, Chile (e-mail:, ricardolizana@ucsc.cl).

Publisher Copyright:
© 2018 IEEE.

Keywords

  • DC-AC power conversion
  • DC-DC power conversion
  • energy storage
  • modular multilevel converter (MMC)
  • power converter

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