Development of a large-capacity superconducting cable for 100 kVA-class power transformers
- Kyushu Univ., Fukuoka (Japan). Faculty of Engineering
- Toshiba Corp., Yokohama (JP)
This paper reports that the authors have designed and fabricated a large-capacity superconducting cable for 1000k VA-class power transformers. The cable is a triply-stacked multi-strand (6 {times} 6 {times} 6) type. The elementary strand has 19,050 NbTi filaments of 0.63 mm thick in CuNi matrix. The test cable is installed as the secondary winding in a superconducting transformer with iron core in a room-temperature space. The primary winding is the second-level subcable of the secondary one and the turn ratio is nearly 14. The designed capacity of the test cable is 4.545 kA at the secondary voltage of 220V. The peak value of the current, 6.43kA (peak), is 78% of the critical current on the load line. The maximum current of the cable at 60Hz operation was 3.78kA (peak). The attained level of the secondary winding is 47% of the critical current. In the 60Hz operation of a small coil wound by the test cable, premature quench was initiated from the terminals of the cable connected with copper plates. It is suggested from the experimental results that the degradation in maximum current of the test cable is related to current transfer between the cable and the copper terminal plates.
- OSTI ID:
- 5333207
- Report Number(s):
- CONF-910662--
- Journal Information:
- IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Vol. 28:1; ISSN IEMGA; ISSN 0018-9464
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
240100 -- Power Systems-- (1990-)
240302* -- Power Transmission Lines & Cables-- Superconducting Cables-- (1990-)
665412 -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
CABLES
CAPACITY
CONDUCTOR DEVICES
COPPER ALLOYS
CURRENT DENSITY
DATA
DESIGN
ELECTRIC CABLES
ELECTRIC CONDUCTIVITY
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
EQUIPMENT
EXPERIMENTAL DATA
FABRICATION
FILAMENTS
INFORMATION
NICKEL ALLOYS
NIOBIUM ALLOYS
NUMERICAL DATA
PHYSICAL PROPERTIES
SUPERCONDUCTING CABLES
SUPERCONDUCTING COILS
SUPERCONDUCTIVITY
TITANIUM ALLOYS
TRANSFORMERS