Some characteristics of dielectric materials at cryogenic temperatures for HVDC systems
This dielectric study was performed as part of the dc Superconducting Power Transmission Line Program. During a screening test program, the dc breakdown strength of 12 dielectric materials, in sheet form, was determined at 12 K under 1.38 MPa of helium pressure, the operating conditions of the cable design. Tests were also made with four of these materials impregnated with mineral oil. Further dc breakdown tests were performed on five of these dielectric materials at various temperatures (12 to 298 K) and pressures (0.69 and 1.38 MPa) of helium. Two sets of experiments were performed on cellulose paper impregnated with distilled water at 83 K and 1.38 MPa of helium pressure. Five dielectric materials were then selected for tests as cable samples with dc and impulse voltages at 12 K and 1.38 MPa of helium. Data are presented on these tests, as well as on those of the electrical conductivity of four dielectric materials at cryogenic temperatures, and of the surface flashover strength of an epoxy bushing at 12 K and 298 K under 0.69 MPa and 1.38 MPa of helium pressures. The characteristics of the dielectric behavior at cryogenic temperatures are discussed.
- Research Organization:
- Los Alamos Scientific Lab., NM
- OSTI ID:
- 5712891
- Journal Information:
- IEEE Trans. Electr. Insul.; (United States), Vol. EI-16:1
- Country of Publication:
- United States
- Language:
- English
Similar Records
Cryogenic power transmission technology: cryogenic dielectrics. Fourteenth quarterly report, April 1, 1976--June 30, 1976
Cryogenic power transmission technology: cryogenic dielectrics. Thirteenth quarterly report, January 1, 1976--March 31, 1976. [Valeron]
Related Subjects
CRYOGENIC CABLES
DIELECTRIC PROPERTIES
HVDC SYSTEMS
CRYOGENICS
DIELECTRIC MATERIALS
ELECTRIC CONDUCTIVITY
EXPERIMENTAL DATA
HELIUM
ULTRALOW TEMPERATURE
CABLES
CONDUCTOR DEVICES
DATA
DC SYSTEMS
ELECTRIC CABLES
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
ELEMENTS
ENERGY SYSTEMS
EQUIPMENT
FLUIDS
GASES
INFORMATION
MATERIALS
NONMETALS
NUMERICAL DATA
PHYSICAL PROPERTIES
POWER SYSTEMS
RARE GASES
200303* - Power Transmission & Distribution- Superconducting & Cryogenic Systems- (-1989)