NDLI: Analysis and Control of Modular Multilevel Converters under Asymmetric Arm Impedance Conditions

Content Provider	IEEE Xplore Digital Library
Author	Zeng, R. Xu, L. Yao, L. Finney, S.J.
Copyright Year	1982
Description	This paper presents a detailed analysis and improved control strategy for modular multilevel converters (MMC) under asymmetric arm inductance conditions. Unlike symmetric conditions, the fundamental ac current is not split equally between the upper and lower arms under asymmetric conditions and the dc and double-frequency components in the common-mode current also flow into the ac side. To solve these issues, a theoretical analysis of the effect of asymmetric conditions on MMC operation is carried out using equivalent circuits at different frequencies. Three control targets are then presented to enhance the operational performance. A control strategy providing the control of differential-mode current, common-mode current and power balance is designed. The feasibility and validity of the proposed analysis and control strategy are demonstrated by simulation results from a three-phase MMC system and simulation and experimental results from a single-phase MMC system.
Sponsorship	IEEE Industrial Electronics Society
Starting Page	71
Ending Page	81
Page Count	11
File Size	2606109
File Format	PDF
ISSN	02780046
Volume Number	63
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2016-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Voltage control Harmonic analysis Frequency control Capacitors Equivalent circuits Impedance Converters asymmetric conditions Modular multilevel converter differential-mode current common-mode current power balance
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Electrical and Electronic Engineering Computer Science Applications

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