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Superconductive magnetic energy storage

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  • Boom, R.W.
  • Van Sciver, S.W.

Abstract

Technical and economic aspects of large scale superconductive magnetic energy storage are discussed. This paper is a review of a program which has been under way at the University of Wisconsin since 1970. Early work between 1970 and 1976 was primarily involved in proving economic and technical feasibility of the concept The present program deals with component development and detailed design ultimately leading to construction of a large superconducting magnet capable of storing 1000–10,000 MWh. The magnet is a single-layered segmented solenoid of approx. 100 m radius. Energy containment is achieved economically by burying the magnet underground in bedrock tunnels. Magnetic loads are transmitted from the conductor to bedrock through glass fiber reinforced composite struts. The conductor consists of a composite of aluminum and NbTi and is designed for full cryogenic stability in 1.8 K superfluid helium. The dewar-conductor assembly will be rippled in a l m radius of curvature to reduce the hoop stress tension. A Graetz bridge is required to convert the d.c. superconducting current into a.c. current in the three-phase power system. Economic analysis indicates that superconductive magnetic energy storage is competitive with alternative large scale storage schemes for units greater than 1000 MWh size.

Suggested Citation

  • Boom, R.W. & Van Sciver, S.W., 1979. "Superconductive magnetic energy storage," Energy, Elsevier, vol. 4(2), pages 217-223.
    • Handle: RePEc:eee:energy:v:4:y:1979:i:2:p:217-223
    DOI: 10.1016/0360-5442(79)90122-1
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