1. Presented By
Sk. Fahad

2. Content
 Overview
 What are superconductors
 Construction
 Classification of HTS cable
 Benefits
 Comparison of transmission lines
 Conclusion

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. 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. 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. 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. Warm Dielectric Cable
 High power density.
 Higher electrical losses.
 conductor is surrounded by conventional
dielectric insulation.
Based on type of dielectric material used

8. 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.
Based on type of dielectric material used

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. Second generation(2G)
 Improved mechanical properties.
 Thickness is reduced and cost is low.
 Improves power quality.
 Losses are reduced.
Based on generation

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. 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. Application
 Designed for primarily underground installations.
 Primary application in large, power-hungry areas.
 Power applications.
 High field magnets.

14. CONCLUSION

15. THANK YOU