Journal
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
Volume 64, Issue 8, Pages 6276-6286Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIE.2017.2677333
Keywords
DC transformer; high voltage direct current (HVDC) converter; resonant modular multilevel converters (RMMCs); step ratio
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Funding
- Power Electronics Science and Education Development Program of the Delta Environmental and Educational Foundation [DREG2016009]
- EPSRC [EP/K006312/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/K006312/1] Funding Source: researchfish
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Resonant modular multilevel converters (RMMCs) have been proposed for high-voltage dc-dc applications. Using different modulation strategies, RMMC operates in different modes and achieves flexible step ratio. To provide a comprehensive study of RMMCs, this paper presents the modulation method achieving a wide range of step ratio with the ability of inherent-balancing. The conditions for guaranteeing the inherent-balancing ability are provided. The operation principle and performance of the RMMC are presented in this paper, which have been explored in a case study. The experimental results are obtained from a bench-scale setup, which have verified the theoretical analysis.
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