Journal
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
Volume 69, Issue 12, Pages 13011-13021Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIE.2021.3127047
Keywords
Common-mode voltage (CMV); current source converter (CSC); flying capacitor clamped (FCC)
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Funding
- Natural Sciences and Engineering Research Council of Canada
- Future Energy Systems Initiative funding from the Canada First Research Excellence Fund
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This article introduces and investigates the three-phase flying-capacitor-clamped CSC for the first time. A novel space vector modulation method is proposed. Simulation and experimental results demonstrate the superior dc-link power quality and CMV performance compared with the traditional three-phase CSC topology.
AC-type flying capacitor (FC) concept has been proposed for current source converter (CSC) topologies recently, which offers unique merits over the traditional CSCs, such as lower dv/dt with improved dc-link voltage quality as well as flexible common-mode voltage (CMV) control. To cope with the main-stream three-phase industrial applications, in this article, the three-phase flying-capacitor-clamped CSC is introduced and extensively investigated for the first time. A novel space vector modulation is proposed, featuring a modular design process, active FC voltage control, and CMV suppression. The detailed commutation principles and the capacitor clamping voltage influence under different switching states are comprehensively addressed. Then, the redundant switching states are optimized to fulfill the multiple targets simultaneously. Simulation and experimental results are performed to demonstrate the superior dc-link power quality and CMV performance compared with the traditional three-phase CSC topology.
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