Energy Storage Science and Technology ›› 2013, Vol. 2 ›› Issue (3): 208-221.doi: 10.3969/j.issn.2095-4239.2013.03.005

• Physical energy storage • Previous Articles     Next Articles

Flywheel array energy storage system

TANG Xisheng, LIU Wenjun, ZHOU Long, QI Zhiping   

  1. Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China
  • Received:2013-02-14 Revised:2013-04-18 Online:2013-06-19 Published:2013-06-19

Abstract: Flywheel energy storage systems (FESS) store energy in a rotating mass. The advantages of such systems includes high power density, environmental friendliness, long lifespan, wide operating temperature range, and very long charge-discharge cycle life. FESS has therefore been widely used in numerous applications. Integrating multiple flywheel energy storage units to form a flywheel array energy storage system (FAESS) provides a mean for large scale energy storage. In this paper, an overview of the current development status and key technologies of FAESS is given. Design method, parallel topology and control strategy of FAESS are then presented. With enhanced control technologies for parallel operation of flywheel energy storage units, FAESS could be used for grid frequency regulation particularly for dealing with intermittent renewable energy generation.

Key words: flywheel array energy storage system (FAESS), flywheel energy storage unit (FESU ), parallel operation, charge and discharge control, permanent magnet synchronous motor (PMSM)

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