Performance of a 1-MVA HTS demonstration transformer

Author

Schwenerly, S.W. ; McConnell, B.W. ; Demko, J.A. ; Fadnek, A. ; Hsu, J. ; List, F.A. ; Walker, M.S. ; Hazelton, D.W. ; Murray, F.S. ; Rice, J.A. ; Trautwein, C.M. ; Shi, X. ; Farrell, R.A. ; Bascuhan, J. ; Hintz, R.E. ; Mehta, S.P. ; Aversa, N. ; Ebert, J

Author_Institution

Oak Ridge Nat. Lab., TN, USA

Volume

9

Issue

2

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

680

Lastpage

684

Abstract

We report on test results for a single phase, 60-Hz, 13.8 kV/6.9 kV, 1-MVA high temperature superconducting (HTS) transformer which was completed in February, 1998. This transformer models in many ways a full scale section of a 30-MVA HTS commercial transformer design. The transformer windings are cryocooled in the range of 25 K and are made with a low-cost, surface-coated BSCCO-2212 conductor. Heat leaks are reduced using a liquid nitrogen thermal ballast and reservoir. The use of high temperature superconductors can substantially reduce transformer losses, weight, size, noise and potential fire and environmental hazards. Designs promise stable operation through faults without thermal degradation, and at temperatures that allow efficient and reliable refrigeration.

Keywords

bismuth alloys; calcium alloys; high-temperature superconductors; power transformers; strontium alloys; superconducting transformers; transformer windings; 1 MVA; 13.8 kV; 6.9 kV; 60 Hz; Bi/sub 2/Sr/sub 2/CaCu/sub 2/O; cryocooled transformer windings; environmental hazards reduction; fire reduction; heat leaks reduction; high temperature superconducting transformer; high temperature superconductors; liquid nitrogen thermal ballast; noise reduction; refrigeration; reservoir; single phase; size reduction; stable operation; surface-coated BSCCO-2212 conductor; transformer losses reduction; weight reduction; Conductors; Electronic ballasts; High temperature superconductors; Nitrogen; Noise reduction; Reservoirs; Superconducting device noise; Testing; Windings; Working environment noise;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.783387

Filename

783387