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Energies 2016, 9(12), 1012; doi:10.3390/en9121012

A Hybrid Modular Multilevel Converter with Partial Embedded Energy Storage

1
School of Electrical Engineering and Telecommunications, University of New South Wales (UNSW) Australia, Sydney, NSW 2052, Australia
2
School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore
3
Federal University of Santa Catarina, Florianópolis 88040-900, Brazil
4
Tecnalia, Energy and Environment Division, 48160 Derio, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Gabriele Grandi
Received: 31 August 2016 / Revised: 14 November 2016 / Accepted: 23 November 2016 / Published: 30 November 2016
(This article belongs to the Special Issue Selected Papers from 2nd Energy Future Conference)
View Full-Text   |   Download PDF [2010 KB, uploaded 30 November 2016]   |  

Abstract

Modular and cascaded multilevel converters provide a functional solution for the integration of energy storage systems (ESSs). This paper develops a hybrid multilevel converter based on the modular multilevel converter (MMC) that can be functionally extended with partial embedded ESS as a fraction of the overall converter power rating. The configuration, which can operate as a typical DC-AC converter, enables multi-directional power flow between the DC- and AC-side of the converter, as well as the embedded energy storage elements. The use of a three-phase flying-capacitor submodule eliminates the second-order harmonic oscillations present in modular cascaded multilevel converters. Current, voltage and power control are discussed in the paper while simulation results illustrate the operation of the hybrid MMC as a DC-AC converter in a typical inverter application and the additional functions and control of the embedded ESS. View Full-Text
Keywords: multilevel converters; modular multilevel converter (MMC); hybrid multilevel converters; energy storage multilevel converters; modular multilevel converter (MMC); hybrid multilevel converters; energy storage
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Konstantinou, G.; Pou, J.; Pagano, D.; Ceballos, S. A Hybrid Modular Multilevel Converter with Partial Embedded Energy Storage. Energies 2016, 9, 1012.

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