Presented BySk.

Fahad

Content

Overview

What are superconductors

Construction

Classification of HTS cable

Benefits

Comparison of transmission lines

Conclusion

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.

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.

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.

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)

Warm Dielectric Cable High power density.

Higher electrical losses.

conductor is surrounded by conventional dielectric insulation.

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.

Based on type of dielectric material used

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.

Second generation(2G)

Improved mechanical properties.

Thickness is reduced and cost is low.

Improves power quality.

Losses are reduced.

Based on generation

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.

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

Application

Designed for primarily underground installations.

Primary application in large, power-hungry areas.

Power applications.

High field magnets.

CONCLUSION

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