Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
권호 표지
DOI QR코드

DOI QR Code

Energy extraction system using dual-capacitor switching for quench protection of HTS magnet

  • Received : 2017.08.16
  • Accepted : 2017.09.14
  • Published : 2017.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

The superconducting magnets have a large inductance as well as high operating current. Therefore, mega-joule scale energy can be stored in the magnet. The energy stored in the magnet is sufficient to damage the magnet when a quench occurs. Quench heater and dump resistor can be used to protect the magnet. However, using quench heater to create quench resistors through heat transfer can be slower than instantly switching resistors. Also, electrical short, overheating and breakdown can occur due to quench heater. Moreover, the number of dump resistor should be limited to avoid large terminal voltage. Therefore, in this paper, we propose a quench protection method for extracting the energy stored in a magnet by charging and discharging energy through a capacitor switching without increasing resistance. The simulation results show that the proposed system has a faster current decay within the allowable voltage level.

Keywords

References

  1. I. R. Dixon, W. D. Markiewicz, P. Murphy, T. A. Painter and A. Powell, "Quench detection and protection of the wide bore 900 MHz NMR magnet at the national high magnetic field laboratory," IEEE Trans. Appl. Supercond., vol. 14, no. 2, pp. 1260-1263, 2004. https://doi.org/10.1109/TASC.2004.830547
  2. F. Rodriguez-Mateos and F. Sonnemann, "Quench heater studies for the LHC magnets," Proc. IEEE PAC, vol. 5, pp. 3451-3453, 2001.
  3. A. V. Fernandez and F. Rodriguez-Mateos, "Reliability of the quench protection system for the LHC superconducting elements," Nucl. Instruments Methods Phys. Res. Sect. A Accel. Spectrometers, Detect. Assoc. Equip., vol. 525, no. 3, pp. 439-446, 2004. https://doi.org/10.1016/j.nima.2004.01.081
  4. A. V. Dudarev, A. V. Gavrilin, H. H. J. Ten Kate, D. E. Baynham, M. J. D. Courthold and C. Lesmond, "Quench propagation and protection analysis of the ATLAS toroids," IEEE Trans. Appl. Supercond., vol. 10, no. 1, pp. 365-368, 2000. https://doi.org/10.1109/77.828249
  5. E. Ravaioli, et al., "First Implementation of the CLIQ Quench Protection System on a Full-Scale Accelerator Quadrupole Magnet," IEEE Trans. Appl. Supercond., vol. 26, no. 3, pp. 3-7, 2016. https://doi.org/10.1109/TASC.2016.2622439
  6. E. Ravaioli, V. I. Datskov, G. Kirby, H. H. J. ten Kate and A. P. Verweij, "A new hybrid protection system for high-field superconducting magnets," Supercond. Sci. Technol., vol. 27, no. 4, p. 44023, 2014. https://doi.org/10.1088/0953-2048/27/4/044023
  7. E. Ravaioli, et al., "Reprint of: First experience with the new Coupling Loss Induced Quench system," Cryogenics (Guildf), vol. 63, pp. 263-274, 2014. https://doi.org/10.1016/j.cryogenics.2014.08.002
  8. E. Ravaioli, et al., "First Implementation of the CLIQ Quench Protection System on a Full-Scale Accelerator Quadrupole Magnet," IEEE Trans. Appl. Supercond., vol. 26, no. 3, pp. 3-7, 2016. https://doi.org/10.1109/TASC.2016.2622439
  9. L. C. Hagedorn, V. Remondino and F. Rodriguez-Mateos, "LHC Magnet Quench Protection System," IEEE Trans. Magn., vol. 30, no. 4, pp. 1742-1745, 1994. https://doi.org/10.1109/20.305593
  10. J. D. Irwin and R. M. Nelms, "First-and second-order transient circuits in Basic engineering circuit analysis," 10th ed., Auburn: John Wiley & Sons, pp. 296-368, 2010.