Development of a Rigid AC Superconducting Power Transmission Line

  • R. W. Meyerhoff
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 19)

Abstract

The availability of less costly and more efficient means for the underground transmission of large blocks of power may be a significant factor in determining the ability of the electric power industry to meet future demands for electric power. It is generally agreed, however, that the present technology of underground power transmission leaves much to be desired when one looks ahead to the anticipated requirements. At the present time, underground superconducting power transmission lines appear to be an attractive alternative to present technology and for this reason have, in recent years, been the subject of research and development programs in several countries. One such program has as its objective the demonstration of both the technical and economic feasibility of ac superconducting power transmission. This three and one-half year program, initiated in late 1971, will conclude in April 1975 with the testing of a laboratory model of a rigid coaxial line having a power rating of approximately 3400 MVA.

Keywords

Fatigue Carbide Total Heat Helium Boiling 

Notation

A

= surface area, cm2

Cυ

= heat capacity of superconducting line, J/sec-K

h

= heat transfer coefficient, W/cm2-K

Hc

= peak value of magnetic field at conductor surface when transport current equals critical current, G

Hp

= peak value of magnetic field at conductor surface at the rated current, G

Ir

= rated current, A, rms

IF

= fault current, A, rms

K

= constant, 63.7 x 10-9 W/cm2-G2

L

= length of superconducting line, cm

r

= radius of tubular conductor, cm

Qmax

= maximum allowable energy dissipation in line, j

R

= electrical resistance, ohms

Tc(IR)

= critical temperature at rated current, K

T0

= normal operating temperature, K

t1

= fault duration, sec

t2

= time following fault for line to cool and return superconducting, sec

δ

= skin depth

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Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • R. W. Meyerhoff
    • 1
  1. 1.Linde DivisionUnion Carbide CorporationTarrytownUSA

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