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Basic design considerations for a medium-size superconducting magnetic energy storage system (SMES)

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2 Author(s)
Nick, W. ; Siemens AG, Mulheim, Germany ; Prescher, K.

In a feasibility study, a 2 MWh magnet system suitable for electric utility application (primary control reserve) is analyzed. Basic choices for a realistic SMES design are considered taking into account practical industrial feasibility. Compared to a large solenoid, advantages are seen for a modular, toroidal configuration with circular coils. To achieve a robust coil pack, internal cooling with supercritical helium for an impregnated winding is selected. System parameters are derived from a cost optimization approach. Possible conductor concepts, a thin-walled coil casing, and a corresponding refrigeration system based on a cryogenic loss estimate are presented

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Magnetics, IEEE Transactions on  (Volume:32 ,  Issue: 4 )