NDLI: An improved nearest-level modulation method for the modular multilevel converter

Content Provider	IEEE Xplore Digital Library
Author	Yi Deng Saeedifard, M. Harley, R.G.
Copyright Year	2015
Description	Author affiliation: Univ. of KwaZulu-Natal, Durban, South Africa (Harley, R.G.) \|\| Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA (Yi Deng; Saeedifard, M.)
Abstract	This paper proposes an improved nearest-level modulation (NLM) method for the modular multilevel converter (MMC). By injecting an optimal common-mode voltage, the proposed method enables optimal capacitor-voltage balancing and circulating-current control of the MMC. A general approach to determine the optimal common-mode voltage is introduced in detail in this paper. In the proposed method, the level number of the output phase voltage of the MMC reaches the maximum (i.e., 2n+1, where n is the number of submodules in the upper or lower arm of each phase), which leads to reduced harmonics. Both of these advantages are not provided by earlier NLM methods. Furthermore, the proposed method is simple to implement and generally applicable to multiphase systems. Simulation results verify the effectiveness and performance of the proposed method.
Starting Page	1595
Ending Page	1600
File Size	1098575
Page Count	6
File Format	PDF
ISBN	9781479967353
DOI	10.1109/APEC.2015.7104560
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-03-15
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Capacitors Voltage control Converters Switches Simulation Phase modulation circulating current suppression modular multilevel converter (MMC) nearest-level modulation (NLM) capacitor voltage balancing
Content Type	Text
Resource Type	Article

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