Lapped insulation for a superconducting power transmission line

Title: Lapped insulation for a superconducting power transmission line

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Abstract

The development of a suitable polymeric tape for use as insulation on ac superconducting cables is a challenging engineering problem for the designer of plastic films. No commercially available tape simultaneously fulfills all of the electrical, mechanical and thermal requirements without modification. Porous, paper-like tapes produced electrically weak cables. Uniaxially oriented polyolefin tapes were found to have tensile properties superior to the nonoriented types, but these materials often fibrillated during cooldown to operating temperature. Further studies showed that commercially produced, 32 ..mu..m-thick, biaxially oriented polypropylene tapes had acceptable tensile properties at both 4.2 and 293 K. The desired tape thickness of 66 ..mu..m and 100 ..mu..m were obtained by laminating two or three layers together with a 2.0 ..mu..m-thick polyurethane adhesive. The loss tangent and permittivity of this laminate meets design considerations. 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.

Authors:: Muller, A C; McNerney, A J; Thomas, R A; Pearmain, A J; Kosaki, M

Publication Date:: 1978-01-01

Research Org.:: Brookhaven National Lab., Upton, NY (USA)

OSTI Identifier:: 6349611

Report Number(s):: BNL-25454; CONF-7810152-1

DOE Contract Number:: EY-76-C-02-0016

Resource Type:: Conference

Resource Relation:: Conference: 5. symposium on superconducting power transmission, Upton, NY, USA, 5 Oct 1978

Country of Publication:: United States

Language:: English

Subject:: 24 POWER TRANSMISSION AND DISTRIBUTION; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ELECTRICAL INSULATION; ELECTRICAL PROPERTIES; MECHANICAL PROPERTIES; SUPERCONDUCTING CABLES; FILMS; HVAC SYSTEMS; POLYETHYLENES; POLYPROPYLENE; POWER TRANSMISSION LINES; UNDERGROUND POWER TRANSMISSION; AC SYSTEMS; CABLES; CONDUCTOR DEVICES; ELECTRIC CABLES; ELECTRICAL EQUIPMENT; EQUIPMENT; ORGANIC COMPOUNDS; ORGANIC POLYMERS; PHYSICAL PROPERTIES; POLYMERS; POLYOLEFINS; POWER SYSTEMS; POWER TRANSMISSION; 200303* - Power Transmission & Distribution- Superconducting & Cryogenic Systems- (-1989); 420201 - Engineering- Cryogenic Equipment & Devices

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                    Muller, A C, McNerney, A J, Thomas, R A, Pearmain, A J, and Kosaki, M. Lapped insulation for a superconducting power transmission line.  United States: N. p., 1978. 
        Web.

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                    Muller, A C, McNerney, A J, Thomas, R A, Pearmain, A J, & Kosaki, M. Lapped insulation for a superconducting power transmission line.  United States.

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                    Muller, A C, McNerney, A J, Thomas, R A, Pearmain, A J, and Kosaki, M. Sun .  
        "Lapped insulation for a superconducting power transmission line".  United States.  https://www.osti.gov/servlets/purl/6349611.

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@article{osti_6349611,

  title        = {Lapped insulation for a superconducting power transmission line},

  author       = {Muller, A C and McNerney, A J and Thomas, R A and Pearmain, A J and Kosaki, M},

  abstractNote = {The development of a suitable polymeric tape for use as insulation on ac superconducting cables is a challenging engineering problem for the designer of plastic films. No commercially available tape simultaneously fulfills all of the electrical, mechanical and thermal requirements without modification. Porous, paper-like tapes produced electrically weak cables. Uniaxially oriented polyolefin tapes were found to have tensile properties superior to the nonoriented types, but these materials often fibrillated during cooldown to operating temperature. Further studies showed that commercially produced, 32 ..mu..m-thick, biaxially oriented polypropylene tapes had acceptable tensile properties at both 4.2 and 293 K. The desired tape thickness of 66 ..mu..m and 100 ..mu..m were obtained by laminating two or three layers together with a 2.0 ..mu..m-thick polyurethane adhesive. The loss tangent and permittivity of this laminate meets design considerations. 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.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/6349611},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1978},

  month        = {1}

}

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