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Analysis and Suppression of Zero-Sequence Circulating Current in Parallel Three-Level Inverters using Improved Interleaved DPWM
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Publication Year
2022-01-01
Journal
2022 International Power Electronics Conference, IPEC-Himeji 2022-ECCE Asia
Publisher
Institute of Electrical and Electronics Engineers Inc.
Citation
2022 International Power Electronics Conference, IPEC-Himeji 2022-ECCE Asia, pp.845-848
Mesh Keyword
Carrier phasisCirculating currentOutput current qualityPaper analysisParallel inverterPhase differencePulsewidth modulations (PWM)Switching sequenceThree-level invertersZero sequences
All Science Classification Codes (ASJC)
Energy Engineering and Power TechnologyRenewable Energy, Sustainability and the EnvironmentElectrical and Electronic EngineeringSafety, Risk, Reliability and QualityControl and Optimization
Abstract
This paper analyzes the switching sequence of an improved interleaved discontinuous pulse width modulation (IIDPWM). An interleaved PWM is used to improve the output current quality of parallel inverters. However, the carrier phase difference caused by the interleaved PWM inevitably generates zero-sequence circulating current (ZSCC). The IIDPWM is the interleaved DPWM applied the carrier phase shift algorithm to suppress ZSCC and has been proposed only in parallel two-level inverters. This paper proposes the IIDPWM applied to parallel three-level inverters for higher power capacity and better output current quality. The switching sequence analysis of the proposed method proves that it has significant ZSCC suppression performance even at high modulation index (MI). The effectiveness of the proposed modulation method is verified by the simulation results.
Language
eng
URI
https://aurora.ajou.ac.kr/handle/2018.oak/36855
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85134214036&origin=inward
DOI
https://doi.org/10.23919/ipec-himeji2022-ecce53331.2022.9807255
Journal URL
http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=9806820
Type
Conference
Funding
ACKNOWLEDGMENT This research was supported by Korea Electric Power Corporation. (Grant number : R21XO01-11)
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Lee, Kyo-Beum이교범
Department of Electrical and Computer Engineering
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