High Voltage Testing of a 5-meter Prototype Triaxial HTS Cable

Conference · Mon Jan 01 04:00:00 EST 2007

OSTI ID:931954

Sauers, Isidor ^[1]; James, David Randy ^[1]; Ellis, Alvin R ^[1]; Tuncer, Enis ^[1]; Pace, Marshall O ^[1]; Gouge, Michael J ^[1]; Demko, Jonathan A ^[1]; Lindsay, David T ^[1]

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1. ORNL

High voltage tests were performed on a 5-m long prototype triaxial HTS cable (supplied by Ultera) at ORNL in preparation for installation of a 200-m HTS cable of the same design at the AEP utility substation in Columbus, Ohio. The triaxial design comprises three concentric phases and shield around a common former with the phase to phase dielectric at cryogenic temperature. Advantages of this design include increased current density, a reduced amount of HTS tape needed, and reduced heat load. The phase to phase voltage will be 13.2 kVrms (7.6 kVrms to ground). Preliminary testing was done on half-scale and full-scale terminations which successfully passed AC withstand, partial discharge, and impulse tests. High voltage tests conducted on the 5-m cable with the cable straight and after bending 90 degrees were ac withstand to 39 kVrms, partial discharge inception, and a minimum of 10 positive and 10 negative lightning waveform impulses at 110 kV. Phase to phase insulation was tested by applying high voltage to each phase one at a time with all the other phases grounded. Partial discharge data will be presented. The 5-m prototype triaxial HTS cable passed all the HV tests performed, with a PD inception voltage significantly above the required voltage.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: OE USDOE - Office of Electric Transmission and Distribution
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 931954
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BENDING
CABLES
CRYOGENICS
CURRENT DENSITY
DESIGN
DIELECTRIC MATERIALS
HTS cable
LIGHTNING
ORNL
SHIELDS
SUPERCONDUCTIVITY
TESTING
dielectrics
high voltage
partial discharge.