High Voltage Testing of a 5-meter Prototype Triaxial HTS Cable
Applied Superconductivity, IEEE Transactions(2007)
Abstract
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.
MoreTranslated text
Key words
current density,high-temperature superconductors,impulse testing,partial discharges,superconducting cables,superconducting device testing,AEP utility substation,Columbus,ORNL,Ohio,PD inception voltage,cryogenic temperature,current density,high voltage testing,impulse tests,lightning waveform impulses,partial discharge inception,phase to phase dielectric,phase to phase insulation,phase to phase voltage,prototype triaxial HTS cable,size 200 m,size 5 m,triaxial design,voltage 110 kV,Dielectrics,HTS cable,high voltage,partial discharge
AI Read Science
Must-Reading Tree
Example
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
Generate MRT to find the research sequence of this paper
Chat Paper
Summary is being generated by the instructions you defined