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The Flywheel Energy Storage System: A Conceptual Study, Design, and Applications in Modern Power Systems

Tawfiq M. Aljohani
Ming Hsieh Department of Electrical Engineering, University of Southern California, Los Angeles, California, USA
Abstract−While energy storage technologies cannot be considered sources of energy; they provide valuable contributions to enhance the stability, power quality and reliability of the supply. Many storage technologies have been developed in an attempt to store the extra AC power for later use. Among these technologies, the Flywheel Energy Storage (FES) system has emerged as one of the best options. This paper presents a conceptual study and illustrations of FES units. After brief introduction to the FES system and its theory of operation, the paper focuses on the important role of the FES system in enhancing the operation of the distribution network. Supported by illustrated circuits, the paper describes the major role of each part of the FES system in the improvement of the power quality of the network. Then it discusses a newly proposed design of the FES system that emerged recently, which includes the use of Superconducting Magnetic Bearings (SMB) and Permanent Magnetic Bearings (PMB). In conclusion, the paper analyzes the FES systems great potentials that could be exploited in improving the reliability of the electrical system.

Index Terms−flywheel energy storage system, energy storage, superconducting magnetic bearings, permanent magnetic bearings, power system quality, power system reliability, design of flywheel

Cite: Tawfiq M. Aljohani, "The Flywheel Energy Storage System: A Conceptual Study, Design, and Applications in Modern Power Systems," International Journal of Electrical Energy, Vol. 2, No. 2, pp. 146-153, June 2014. doi: 10.12720/ijoee.2.2.146-153
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