Triaxial HTS Cable for the AEP Bixby Project

• Published in: IEEE transactions on applied superconductivity Vol. 17; no. 2; pp. 2047 - 2050
• Main Authors: Demko, J.A., Nielsen, C.T., Sauers, I., James, D.R., Gouge, M.J., Lindsay, D., Roden, M., Tolbert, J., Willen, D., Traeholt, C.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01-06-2007; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Arm; Cables; Circuit testing; Connection and protection apparatus; Cryogenics; Design engineering; Electric connection. Cables. Wiring; Electric utilities; Electrical engineering. Electrical power engineering; Electrical power engineering; Exact sciences and technology; High temperature superconductors; High voltages; Manufacturing; Power cables; Power networks and lines; power transmission lines; Product development; Prototypes; Substations; Superconducting cables; Superconductivity; Switchgear; Terminations; Thermal analysis; Transformers; Transformers and inductors; Various equipment and components; Voltage; Electric transformer; power transmission lines; Substation; Prototype; Electric energy transportation; Switchgear; high-temperature superconductors; Termination; Steady state; Cryogenic temperature; Operating conditions; High voltage; Electric power; Cryogenics; superconducting cables; Superconducting cable; Thermal analysis; Overcurrent; High temperature superconductor; Power transmission line
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2007.897842

Ultera has installed a single 200-meter long high temperature superconducting (HTS) 3-phase triaxial design cable at the American electric power (AEP) Bixby substation in Columbus, Ohio. The cable connects a 138/13.2 kV transformer to the distribution switchgear serving seven outgoing circuits. It was designed to carry 3000 Arms. Testing of 3- to 5-meter length prototype cables, including a 5-meter prototype with full scale terminations tested at ORNL was conducted prior to the manufacture and installation of the AEP triaxial cable. These prototypes were used to demonstrate the crucial operating conditions including steady state operation at the 3000 A rms design current, high voltage operation, high voltage withstand and 110 kV impulse, and overcurrent fault capability. A summary of the results from the thermal analysis and testing conducted by Ultera and ORNL will be presented. Some analysis of the cable thermal-hydraulic response based on the testing that were used to determine some of the cable cryogenic system requirements are also presented.