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A DC-Link Ripple Current Reduction Method Based on Variable Switching Sequences for Three-Level NPC Inverters
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Publication Year
2023-01-01
Journal
2023 IEEE Conference on Energy Conversion, CENCON 2023
Publisher
Institute of Electrical and Electronics Engineers Inc.
Citation
2023 IEEE Conference on Energy Conversion, CENCON 2023, pp.10-13
Keyword
DC-linkNeutral-point currentSpace Vector Pulse-Width ModulationThree-level NPC inverter
Mesh Keyword
Dc-linkNeutral pointsNeutral-point clamped invertersNeutral-point currentPoint currentsRipple currentsSpace vector pulse width modulationSwitching sequenceThree-level neutral point clampedThree-level neutral-point-clamped inverte
All Science Classification Codes (ASJC)
Energy Engineering and Power TechnologyRenewable Energy, Sustainability and the EnvironmentAutomotive EngineeringElectrical and Electronic EngineeringMechanical Engineering
Abstract
This paper presents a DC-link ripple current reduction method based on variable switching sequences for three-level neutral-point-clamped (NPC) inverters. Capacitors are used to maintain the stable DC-link voltage and current in the DC-link of a three-level NPC inverter. In addition, an allowable ripple current is a key factor affecting capacitor design. The ripple current in the DC-link increases the capacitor temperature and reduces lifespan, which can lead to decreased reliability of power conversion systems. The proposed method divides the voltage modulation region into two areas. An optimized switching scheme generates a new switching sequence by selecting the voltage vector that minimizes the DC-link current based on the voltage modulation region. The effectiveness of the proposed method is verified with simulation results.
Language
eng
URI
https://aurora.ajou.ac.kr/handle/2018.oak/36934
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85182936526&origin=inward
DOI
https://doi.org/10.1109/cencon58932.2023.10368991
Journal URL
http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=10368382
Type
Conference
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Lee, Kyo-Beum이교범
Department of Electrical and Computer Engineering
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