Quench detection method without a central voltage tap by calculating active power

In this paper, we present an electric quench detection method without a central voltage tap which may cause the short-circuit of the lead-wires from the voltage taps in the quench detection of a large AC superconducting coil. In this method, an inductive voltage detection coil is used instead of the...

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Bibliographic Details
Published in:Cryogenics (Guildford) 2004, Vol.44 (1), p.1-5
Main Authors: Nanato, N., Nakamura, K.
Format: Article
Language:English
Subjects:
AC superconducting coil
Applied sciences
Controled nuclear fusion plants
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Inductive voltage detection
Installations for energy generation and conversion: thermal and electrical energy
Quench detection
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Summary:In this paper, we present an electric quench detection method without a central voltage tap which may cause the short-circuit of the lead-wires from the voltage taps in the quench detection of a large AC superconducting coil. In this method, an inductive voltage detection coil is used instead of the central voltage tap. The inductive voltage detection coil is electrically insulated from a superconducting coil and therefore the lead-wires do not break down. Through the quench detection tests for a Bi-2223/Ag HTS coil, we show the feasibility of the proposed method for detecting the quench of the large AC superconducting coil.
ISSN:0011-2275
1879-2235
DOI:10.1016/S0011-2275(03)00158-9