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A reliability improvement method for three-level inverters with modified VSVPWM
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Publication Year
2020-11-15
Journal
2020 IEEE PELS Workshop on Emerging Technologies: Wireless Power Transfer, WoW 2020
Publisher
Institute of Electrical and Electronics Engineers Inc.
Citation
2020 IEEE PELS Workshop on Emerging Technologies: Wireless Power Transfer, WoW 2020, pp.184-188
Keyword
CapacitorCommon-mode voltage (CMV)DC-link ripple currentSpace vector pulse width modulation (SVPWM)Three-level inverterVirtual space vector pulse width modulation (VSVPWM)
Mesh Keyword
Capacitor currentCapacitor ripple currentsDc link capacitorMagnetic interferencePeak-to-peak valuesReliability improvementThree-level invertersVirtual space vectors
All Science Classification Codes (ASJC)
Electrical and Electronic EngineeringComputer Networks and CommunicationsComputer Science ApplicationsEnergy Engineering and Power TechnologyControl and Optimization
Abstract
This paper proposes a novel virtual space vector pulse width modulation (VSVPWM) method for reliability improvement of the three-level inverters. In the three-level inverters, the DC-link is divided into two capacitors to create the neutral-point (NP). The split DC-link capacitors induce a drawback which is AC unbalance between each DC-link voltage of capacitors. To mitigate this drawback, VSVPWM was widely researched. The VSVPWM controls AC ripple component of the NP voltage to zero within one switching period. However, VSVPWM does not consider the NP ripple current and CMV. The NP current equals to the sum of each capacitor currents. Its large ripple component increases the core temperature in capacitor, which reduces the lifespan of the DC-link capacitors. Additionally, CMV with a large peak-to-peak value generates the electro-magnetic interference issues and leakage current. In this paper, an optimized VSVPWM for suppressing the capacitor ripple current and the variation of CMV is proposed. The effectiveness and validity of the modified VSVPWM are verified with various simulation results.
Language
eng
URI
https://aurora.ajou.ac.kr/handle/2018.oak/36606
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85099313594&origin=inward
DOI
https://doi.org/10.1109/wow47795.2020.9291329
Journal URL
http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=9290776
Type
Conference
Funding
ACKNOWLEDGMENT This work was supported by the Korea Institute of Energy Technology Evaluation and Planning(KETEP) and the Ministry of Trade, Industry & Energy(MOTIE) of the Republic of Korea (No. 20206910100160)
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Lee, Kyo-Beum이교범
Department of Electrical and Computer Engineering
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