Polymeric films for use on superconducting power transmission cables
Research on the development of electrical insulation for a flexible, helium-cooled superconducting cable for a 138 kV underground power transmission system is reported. Solid, polyethylene or polypropylene tapes were found to best satisfy dielectric requirements. The antioxidant was found to be the major source of dielectric loss at 100 Hz and 4.2/sup 0/K, and the selection of the proper type and concentration of antioxidant kept tan delta within design limits. Acceptable values of yield strength and tensile moduli were obtained with several 25 ..mu..m-thick, biaxially-oriented, polypropylene films laminated to obtain the required tape thickness. Biaxial orientation was also found to reduce thermal contraction and increase the 4.2/sup 0/K elongation of the polypropylene films. Work has been started to develop a very high modulus, single layer polyethylene tape for use with higher voltage superconducting cables.
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- EY-76-C-02-0016
- OSTI ID:
- 6876174
- Report Number(s):
- BNL-24443; CONF-781110-3
- Resource Relation:
- Conference: 71. meeting of the AICHE, Miami, FL, USA, 12 Nov 1978
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ELECTRICAL INSULATION
FABRICATION
SPECIFICATIONS
HVAC SYSTEMS
SUPERCONDUCTING CABLES
DESIGN
DIELECTRIC MATERIALS
FILMS
HELIUM
LAYERS
POLYMERS
RESEARCH PROGRAMS
UNDERGROUND POWER TRANSMISSION
AC SYSTEMS
CABLES
CONDUCTOR DEVICES
CRYOGENIC FLUIDS
ELECTRIC CABLES
ELECTRICAL EQUIPMENT
ELEMENTS
EQUIPMENT
FLUIDS
NONMETALS
POWER SYSTEMS
POWER TRANSMISSION
RARE GASES
200301* - Power Transmission & Distribution- AC Systems
EHV & UHV- (-1989)