A Novel Flywheel Array Energy Storage System with DC Series Connection

Flywheel Energy Storage System (FESS) becomes more attractive than other energy storage technologies due to its significant advantages. Single flywheel has limited power capacity, hence modular flywheel units are integrated to form a FESS array (FAESS) to achieve larger power level. Generally the fl...

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Bibliographic Details
Published inIECON 2020 The 46th Annual Conference of the IEEE Industrial Electronics Society pp. 1740 - 1743
Main Authors Lv, Jingliang, Jiang, Xinjian, Gong, Guoxian
Format Conference Proceeding
LanguageEnglish
Published IEEE 18.10.2020
Subjects
Capacitors
Discharges (electric)
Energy storage
flywheel array
Flywheels
HVDC
Power control
Velocity control
Voltage control
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Summary:Flywheel Energy Storage System (FESS) becomes more attractive than other energy storage technologies due to its significant advantages. Single flywheel has limited power capacity, hence modular flywheel units are integrated to form a FESS array (FAESS) to achieve larger power level. Generally the flywheel units are connected in parallel on dc bus, which shows good modularity and controllability. However, the dc voltage in this topology cannot be high because of the voltage restriction of converters and motors. This paper proposed a novel FAESS with dc series connection, which means the positive and negative polarity in neighboring units are connected together. This topology adjusts the interface voltage rating by increasing or decreasing the count of units. Hence the system can be applied in high voltage applications such as HVDC transmission. Corresponding power control and balancing control strategies are also presented in this paper. Simulations are implemented to verify the excellent performance of the novel FAESS.
ISSN:2577-1647
DOI:10.1109/IECON43393.2020.9254641