Power transformer with superconducting windings

Author

Hornfeldt, S. ; Albertsson, Ove ; Bonmann, Dietrich ; Konig, Friedrich

Author_Institution

ABB Corp. Res., Vasteras, Sweden

Volume

29

Issue

6

fYear

1993

fDate

11/1/1993 12:00:00 AM

Firstpage

3556

Lastpage

3558

Abstract

A 330-kVA power transformer with superconducting windings is discussed. A niobium-titanium based superconducting wire optimized for AC applications was used in the windings. The transformer worked according to its design at rated power. The total heat input to the liquid helium bath at this power was 9.4 W, of which the AC losses dissipated in the windings were about 1 W per winding. The low voltage feedthroughs which had to carry 830 A_rms at rated power worked adequately. The transformer revealed an apparent current limiting effect. This property can be utilized to limit currents in a network for time periods 10-50 ms. A quench protection device was designed and incorporated in the test circuit

Keywords

magnetic leakage; niobium alloys; power transformers; superconducting devices; titanium alloys; transformer windings; 10 to 50 ms; 330 kVA; 830 A; 9.4 W; AC applications; AC losses; NbTi wire; current limiting effect; low voltage feedthroughs; power transformer; quench protection device; superconducting windings; test circuit; total heat input; Circuit testing; Conductors; Glass; Helium; Low voltage; Phase transformers; Power transformers; Superconducting filaments and wires; Superconducting magnets; Superconductivity;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.281228

Filename

281228