Development of quench protection system for HTS coils by active power method

Nozomu Nanato, Y. Tsumiyama, Seok Beom Kim, S. Murase, K. C. Seong, H. J. Kim

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Recently, HTS coils have been developed for electric power apparatuses. In superconducting coils, local and excessive joule heating may give damage to the superconducting windings when a quench occurs and therefore it is essential that the quench is detected quickly and precisely so that the coils can be safely discharged. Resistive voltage measurement method is universally used for the quench detection, however, it is vulnerable to an electromagnetic noise which causes insufficient quench detection and at least needs a central voltage tap in windings. In a large superconducting coil, a lead-wire from the central voltage tap may cause a short-circuit when high voltage will be applied. In this paper, we present a quench protection system based on the active power method which detects a quench by measuring the instantaneous active power generated in a superconducting coil. The protection system based on this method is very strong against to the noise and no more needs a central voltage tap. The performance of system developed by us is confirmed by using test coil wound with Bi-2223 HTS tapes.

Original languageEnglish
Pages (from-to)1281-1284
Number of pages4
JournalPhysica C: Superconductivity and its Applications
Volume463-465
Issue numberSUPPL.
DOIs
Publication statusPublished - Oct 1 2007

Fingerprint

coils
taps
Electric potential
Joule heating
Voltage measurement
electric potential
Short circuit currents
Tapes
electromagnetic noise
Lead
causes
short circuits
Wire
electric power
electrical measurement
tapes
high voltages
wire
damage
Superconducting coils

Keywords

  • Active power method
  • HTS coil
  • Quench detection

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Development of quench protection system for HTS coils by active power method. / Nanato, Nozomu; Tsumiyama, Y.; Kim, Seok Beom; Murase, S.; Seong, K. C.; Kim, H. J.

In: Physica C: Superconductivity and its Applications, Vol. 463-465, No. SUPPL., 01.10.2007, p. 1281-1284.

Research output: Contribution to journalArticle

Nanato, Nozomu ; Tsumiyama, Y. ; Kim, Seok Beom ; Murase, S. ; Seong, K. C. ; Kim, H. J. / Development of quench protection system for HTS coils by active power method. In: Physica C: Superconductivity and its Applications. 2007 ; Vol. 463-465, No. SUPPL. pp. 1281-1284.
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