Hts cable (6)

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Hts cable (6)

  1. 1. Presented By Sk. Fahad
  2. 2. Content  Overview  What are superconductors  Construction  Classification of HTS cable  Benefits  Comparison of transmission lines  Conclusion
  3. 3. Overview  High Temperature Superconductors” (HTS) was discovered in 1986.  High-temperature superconductors (HTS) based on the application of superconductors.  HTS promise to revolutionize power distribution.  HTS power cables will enable utilities to upgrade power density.
  4. 4. SUPERCONDUCTORS Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic fields occurring in certain materials when cooled below a critical temperature.
  5. 5. Construction  Construction of the hts cable uses traditional stranding techniques and equipment to wind hts wires around a hollow core.  shield are formed by winding Bi wire around the core.  Insulation structure prepared by impregnating liquid nitrogen into “Polypropylene.  Liquid nitrogen is run through the hollow core to cool the hts material.
  6. 6. Classification Of HTS Cable  Based on type of dielectric material used:  Warm dielectric cable  Cryogenic dielectric cable  Based on generation:  First generation(1g)  Second generation(2g)
  7. 7. Based on type of dielectric material used Warm Dielectric Cable  High power density.  Higher electrical losses.  conductor is surrounded dielectric insulation. by conventional
  8. 8. Based on type of dielectric material used Cryogenic Dielectric Cable  Magnetic field measured outside the center of the cable was small.  Cryogenic dielectric reduces size.  Flexible cable to allow reeling.  Reduction of ac losses.
  9. 9. Based on generation First generation(1G)  Available since late 1990s.  First generation superconducting wires made by the power in tube method.  1G hts wire is prepared through a powder-in-tube process.  1G hts wire uses a filamentary structure.  Design is inherently costly.
  10. 10. Based on generation Second generation(2G)  Improved mechanical properties.  Thickness is reduced and cost is low.  Improves power quality.  Losses are reduced.
  11. 11. Benefits  Current carrying capability 3-5 times that of conventional cable.  Enhanced overall system efficiency.  Reduced electricity costs.  Generates essentially no waste heat or electrical losses.  Use of environmentally benign liquid nitrogen for cooling.  Takes up less space than conventional cables.
  12. 12. A Comparison of Power Transmission Technologies Technology Resistance (Ω/km) Inductance (mH/km) Capacitance (nF/km) Cold Dielectric HTS 0.1 10-3 0.06 257 Conventional XLPE 0.03 0.36 257 Overhead Line 0.08 1.26 8.8
  13. 13. Application  Designed for primarily underground installations.  Primary application in large, power-hungry areas.  Power applications.  High field magnets.
  14. 14. CONCLUSION
  15. 15. THANK YOU

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