This study presents a new ‘cascaded flywheel energy storage system’ topology. The principles of the proposed structure are presented. Electromechanical behaviour of the system is derived base on the extension of the general formulation of the electric machines. Design considerations and criteria are discussed and a general procedure for designing of such energy storage system is developed. Typical machine is designed and an analogy between it and the conventional one is discussed. Comparison shows significant improvements in energy density and utility requirements of the proposed system in comparison to the conventional structure. Dynamic response of the designed machine is studied in various conditions as the stand‐alone and also as the grid‐connected system. Finally, a typical three‐stage system is designed, prototyped and tested which shows a good agreement between an analytical and experimental analysis.
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Ghaemi et al. (2017) studied this question.
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