Sparse AC/AC Modular Multilevel Converter

Alaei, Ramiar; Khajehoddin, S. Ali; Xu, Wilsun

doi:10.1109/tpwrd.2015.2440271

Cited by 8 publications

(2 citation statements)

References 36 publications

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“…A new bidirectional MC topology named as AC/AC sparse MMC (SMMC) in Alaei et al convenient for high power AC/AC industrial applications is proposed. According to the conventional topologies, sparse AC/AC MMC has fewer SDs and capacitors.…”

Section: Circuit Topology and Modellingmentioning

confidence: 99%

Recent contributions and future prospects of the modular multilevel converters: A comprehensive review

Kurtoğlu

Eroğlu

Arslan

et al. 2018

Int Trans Electr Energ Syst

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Summary The modular multilevel converters (MMCs) are frequently preferred for medium and high power energy conversion systems thanks to their modular structure and high quality output waveform. The remarkable studies related to the MMC have been carried out in recent years, which are mainly focused on its topology, control, or application. In this paper, MMC circuit topologies consisting of traditional submodule cells and new proposed configurations are introduced, and their control process, modulation techniques, and application areas are discussed in order to provide the readers the current state of the art of MMC technology. A wide part of this article is devoted to demonstrate the recent contributions arising in MMC studies. In this context, this paper not only outlines the circuit topology, control objectives, and applications of the MMC but also presents a comprehensive review, principally in terms of the latest developments of it. Ultimately, detailed proposals and new possible topics are provided to drive future expectations of MMC technology.

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Section: Circuit Topology and Modellingmentioning

confidence: 99%

Recent contributions and future prospects of the modular multilevel converters: A comprehensive review

Kurtoğlu

Eroğlu

Arslan

et al. 2018

Int Trans Electr Energ Syst

View full text Add to dashboard Cite

show abstract

“…MMC is also have some drawbacks, i.e more number of IGBT switches can operate under hard switching mode and circulating current is also more. To overcome such limitations of MMC, a new bi-directional converter, i.e sparse modular multilevel Converter(SMMC) is proposed [10]. SMMC contains fewer number of components than compared with the other types of converter topologies.…”

Section: Introductionmentioning

confidence: 99%

Simulation of 7- Level AC–AC Sparse Modular Multilevel Converter

Rao¹,

Mayuri.²

2018

IJEAS

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7-level AC-AC Sparse modular multilevel converter (SMMC) is proposed in this paper. It is a bi-directional multilevel converter and it is employed in high power and high voltage applications. It contains full bridge and half bridge SM's on the middle arm, and low frequency converters on each side of the converter. In this converter more number of IGBT switches can work under soft switching mode. Control scheme is also proposed in this paper, it is utilized to obtain the capacitor voltage balancing. Capacitor voltages have some oscillations, harmonics will be decreased by applying modified PWM technique. Number of levels of the converter increases, voltage harmonics will be decreased and also switching frequency of the full bridge and half bridge arm IGBTs is decrease. The appropriateness of the 7-level AC/AC SMMC with Control scheme will be estimated by utilizing the MATLAB/SIMULINK software. Index Terms-7-level AC/AC SMMC, Control design, Capacitor voltage balancing, Modified PWM technique. M. Anka Rao received M.Tech degree in power and industrial drives from JNTU College of engineering and technology, Anantapur in the year 2010. He is currently working as an Assistant professor in electrical and electronics department in JNTU College of engineering & technology, Anantapur. He awarded a B.Tech degree in Electrical and Electronics Engineering from Andhra University in the year 2006. He is currently working towards the Ph.D degree in power and industrial drives at JNTU college of Engineering & technology, Anantapur. R. Mayuri received B.Tech degree in Electrical and Electronics Engineering from Rajeev Gandhi Memorial College of Engineering and Technology, Nandyala in the year 2016. She is currently working towards the M.Tech degree in Power and Industrial Drives in JNTU College of Engineering & Technology, Ananatapur.

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Series Hybrid Modular Multilevel Converter for HVDC Transmission Systems

Alaei,

Khajehoddin

2024

IEEE Access

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In this paper, a multilevel Voltage Source Converter for HVDC transmission systems is proposed. The topology is based on a string of full-bridge submodules in addition to an unfolder on the converter's AC-side. Compared to the modular multilevel converter, it has fewer components and has the advantage that almost two third of the switches operate in soft switching mode. Furthermore, for the same level of stress on converter and transformer, it provides a DC-link voltage 3.33 times higher than AC-side rms-voltage. A control strategy is proposed to regulate the active and reactive power exchanged with the grid while the capacitor voltage balancing is ensured. The viability of the proposed converter, as well as the effectiveness of the voltage balancing control strategy are confirmed by simulation and experiment.INDEX TERMS High power converter, HVDC system, transmission lines, modular multilevel converter, soft switching.

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Sparse AC/AC Modular Multilevel Converter

Cited by 8 publications

References 36 publications

Recent contributions and future prospects of the modular multilevel converters: A comprehensive review

Recent contributions and future prospects of the modular multilevel converters: A comprehensive review

Simulation of 7- Level AC–AC Sparse Modular Multilevel Converter

Series Hybrid Modular Multilevel Converter for HVDC Transmission Systems

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