A Novel Z-Type Self-Balancing Modular Multilevel Converter for Flywheel Driving Applications

With the development of flywheel technology, the speed and the voltage level of flywheel continue to increase. The Z-type self-balancing modular multilevel converter can have a wide frequency range at medium voltage and is suitable for flywheel driving application. However, the voltage and current c...

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Bibliographic Details
Published in:E3S Web of Conferences 2021, Vol.271, p.1025
Main Authors: Cheng, Shuoqi, Zheng, Tong, Gao, Congzhe, Lv, Jingliang, Jiang, Xinjian
Format: Article
Language:English
Subjects:
Algorithms
Balancing
Capacitors
Control algorithms
Control theory
Converters
Electric potential
Flywheels
Frequency ranges
Multilevel
Theoretical analysis
Voltage
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Summary:With the development of flywheel technology, the speed and the voltage level of flywheel continue to increase. The Z-type self-balancing modular multilevel converter can have a wide frequency range at medium voltage and is suitable for flywheel driving application. However, the voltage and current characteristics of the flywheel and the variable frequency drive still affect capacitor voltage balance in each phase-leg. The new balance of capacitor voltage can be achieved by controlling the circulating current. This paper proposed a control algorithm of the novel Z-type self-balancing modular multilevel converter for flywheel driving applications. Simulation results are presented to validate the theoretical analysis.
ISSN:2267-1242
2555-0403
2267-1242
DOI:10.1051/e3sconf/202127101025