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Circulating current control scheme of modular multilevel converters supplying passive networks under unbalanced load conditions

descriptionPublicationkeyboard_double_arrow_right Article , Journal 01 Jun 2019 Australia, Singapore Publisher:Elsevier BVJournal:Electric Power Systems Research, volume 171, pages 36-46 (issn: 0378-7796,

Authors: Zhang, H; Wickramasinghe, HR; Jing, L; Li, J; Pou, J; Konstantinou, G; Wickramasinghe, Harith;

doi: 10.1016/j.epsr.2019.01.041

handle: 1959.4/unsworks_76438 , 10356/144589

Circulating current control scheme of modular multilevel converters supplying passive networks under unbalanced load conditions

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Abstract

Abstract Load imbalances in the supply of passive loads with modular multilevel converter (MMC)-based medium (MVDC) and high voltage (HVDC) dc-links are inevitable. In such applications, the maximum-allowable voltage ripples and peak arm currents define the operating limits of the MMCs. This paper demonstrates the impact of circulating current control in capacitor voltage ripples of sub-modules and peak arm currents under unbalanced load conditions when supplying passive networks, comparing the effects of three circulating current control methods on internal variables of the MMCs. The efficacy of the circulating current control is validated through real-time digital simulations of an 800 MVA benchmark MMC-based HVDC transmission system.

Countries

Australia, Singapore

Related Organizations

Nanyang Technological University
Singapore
Beijing Jiaotong University
China (People's Republic of)
UNSW Sydney
Australia
Beijing Jiaotong University
China (People's Republic of)

Keywords

anzsrc-for: 4009 Electronics, Engineering::Electrical and electronic engineering, MVDC, 620, anzsrc-for: 40 Engineering, 4009 Electronics, Modular Multilevel Converter, :Electrical and electronic engineering [Engineering], 4008 Electrical Engineering, Sensors and Digital Hardware, anzsrc-for: 4008 Electrical Engineering, anzsrc-for: 0906 Electrical and Electronic Engineering, 40 Engineering

Impact byBIP!

	citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	7
	popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.	Top 10%
	influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	Top 10%
	impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.	Average