Towards the superconducting fault current limiter

Author

Thuries, E. ; Pham, V.D. ; Laumond, Y. ; Verhaege, T. ; Fevrier, A. ; Collet, M. ; Bekhaled, M.

Volume

6

Issue

2

fYear

1991

fDate

4/1/1991 12:00:00 AM

Firstpage

801

Lastpage

808

Abstract

The advent of low-loss AC superconductor wires opens the way to a new current limiting technique: that of extremely fast transition from a superconducting state to a resistive state when the fault current exceeds the conductor´s critical current. A 25 kV single-phase prototype is described which consists of a Nb Ti superconducting coil without iron core and with very low inductance, lodged inside a conventional cryostat with liquid helium; each terminal of the coil is linked to a current lead and to a voltage bushing. The results obtained in power tests with a voltage of up to 16 kV and and a short-circuit current of up to 15 kA are given. the fault current, limited to 350 A in a few microseconds, confirms the feasibility of this type of current limiting device

Keywords

bushings; fault currents; overcurrent protection; short-circuit currents; superconducting magnets; 25 kV; NbTi superconducting coil; critical current; cryostat; current lead; power tests; short-circuit current; superconducting fault current limiter; voltage bushing; Critical current; Current limiters; Fault current limiters; Fault currents; Iron; Niobium; Prototypes; Superconducting coils; Superconducting filaments and wires; Voltage;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.131138

Filename

131138