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Design Criteria for Warm Temperature Dielectric Superconducting dc Cables:

Design Criteria for Warm Temperature Dielectric Superconducting dc Cables:. Impact of Co-Pole Magnetic Fields. Work supported under EPRI contract. 8 th European Conference on Applied Superconductivity Brussels, Belgium 16-20 September 2007.

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Design Criteria for Warm Temperature Dielectric Superconducting dc Cables:

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  1. Design Criteria for Warm Temperature Dielectric Superconducting dc Cables: Impact of Co-Pole Magnetic Fields Work supported under EPRI contract 8th European Conference on Applied Superconductivity Brussels, Belgium16-20 September 2007 Session L2: Power Cables Paper 0455 11h00, Tuesday 18 September 2007

  2. EPRI WTD Cable - 1994

  3. D d 2a EPRI/Pirelli WTD Prototype

  4. Past WTD Cable Demonstration Specifications

  5. Puji Substation - Kunming

  6. Detroit – Edison (Frisbie)

  7. Inter-ConductorMagnetic and Force Fields Ampere’s Law Lorentz Force

  8. Co-Phase Induced ac Losses

  9. Two ConductorBiot-Savart Equations

  10. Field – Force Distributions

  11. RH Conductor Field – Force Contours

  12. y ĥ ŝ B, F m  a x d/2 (7) (6) (8) Incidence Angle and Magnitude of Inter-Conductor Field and Force

  13. Field Angle and Magnitude Incident on RH Conductor

  14. Ic Dependence on Field Angle of Incidence for RABiTS YBCO Films Kang S, et al. 2006 Science311 1911

  15. Gaussian-Based Fit

  16. Iab/Ibase=1.31 Ic/Ibase =1.10 Iab/Ic =1.19

  17. Magnetic fields and forces between WTD cables as a function of separation

  18. Conclusions & Homework • Critical state effects arising from mutual co-pole magnetic fields are manageable, especially with the development of isotropically pinned Gen 2 Tapes. • But conductor/cryostat forces management will be difficult and require novel approaches.

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