Transient electrical behaviour of the ITER TF coils during fast discharge and two fault cases

Fink, S.; Bonicelli, T.; Fietz, W.H.; Miri, A.M.; Quan, X.; Ulbricht, A.

doi:10.1016/j.fusengdes.2005.06.171

Cited by 11 publications

(5 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…TF magnet system for the quench protection, as shown in figure 19. Each FDU is interleaved with a pair of TF coils to limit the coil terminal voltage to ground [49,50]. The temperature dependent resistors are used for the quench protection to reduce the maximum terminal voltage and the electromagnetic force in the vacuum vessel results from the induced eddy current during the fast discharge [23,[50][51][52][53][54].…”

Section: Quench Analysis Of the Cfetr Tf Coilsmentioning

confidence: 99%

Electromagnetic, mechanical and thermal performance analysis of the CFETR magnet system

et al. 2015

View full text Add to dashboard Cite

The Chinese Fusion Engineering Test Reactor (CFETR) superconducting magnet system was designed by the National Integration Design Group for Magnetic Confinement Fusion Reactor. The CFETR magnet system consists mainly of a central solenoid (CS) coil with six modules, 16 toroidal field (TF) coils, 8 poloidal field (PF) coils, and a set of correction coils (CC). The electromagnetic stresses and stored magnetic energy are huge on the CFETR magnets since they experience both large current densities and high magnetic field. The electromagnetic, structural and thermal performance needs to be evaluated to ensure that the magnetic field, stress, and hot spot temperature of the magnet system are within the allowed criteria.The evaluation of the electromagnetic performance of the CFETR superconducting magnet system under normal operation and fault conditions was performed. The two-dimensional finite element method was adopted to analyse the stress/strain behaviour of the CFETR CS coils. In addition, the thermal-hydraulic behaviour on quench propagation performance of the CFETR CS and TF coils was analysed to evaluate the hot spot temperature of the cable and the helium pressure inside a jacket during a quench.

show abstract

Section: Quench Analysis Of the Cfetr Tf Coilsmentioning

confidence: 99%

Electromagnetic, mechanical and thermal performance analysis of the CFETR magnet system

et al. 2015

View full text Add to dashboard Cite

show abstract

“…To determine test voltages for the ITER TF coils the transient voltage behavior was investigated in detail [7], [8]. A lumped element network of the complete ITER TF coil circuit including power supplies and fast discharge units was created and used to calculate the terminal voltage at a TF coil under fast discharge and in two failure cases as explained below in Section IV.…”

Section: Transient Voltage Calculations For Iter Tf Coilsmentioning

confidence: 99%

Internal Transient Over-Voltages in Large Fusion Coils

Fietz

Fink

Lange

et al. 2012

IEEE Trans. Appl. Supercond.

Self Cite

View full text Add to dashboard Cite

Magnets show a linear voltage distribution along the windings for slow changing currents. This simple behavior may be lost when fast transients occur, e.g. for fast discharge or earth fault events. Such transients may become critical with respect to the magnet lifetime if they are not considered in design and acceptance tests. The problem of internal transient over-voltages can become more essential for large magnets with high number of turns because the critical frequencies for transients are lowered due to the large number of capacitances and inductances of windings and winding packs. At KIT large fusion magnets such as POLO and the ITER Toroidal Field Model coil (TFMC) have been investigated in the large coil testing facility TOSKA. For these coils direct measurements of internal over-voltages were possible and could be compared to calculations of transient voltages. As a consequence a set of transient voltage calculations was executed at KIT for ITER coils. An overview of calculations and results for ITER TF and PF coils is given and consequences for high voltage testing are discussed.

show abstract

“…coils or transformers in general. In particular for the fusion experiment ITER appropriate electrical testing methods have to be developed [9], [10].…”

Section: Introductionmentioning

confidence: 99%

ac modeling and impedance spectrum tests of the superconducting magnetic field coils for the Wendelstein 7-X fusion experiment

Ehmler

Köppen

2007

Review of Scientific Instruments

View full text Add to dashboard Cite

The impedance spectrum test was employed for detection of short circuits within W7-X superconducting magnetic field coils. This test is based on measuring the complex impedance over several decades of frequency. The results are compared to predictions of appropriate electrical equivalent circuits of coils in different production states or during cold test. When the equivalent circuit is not too complicated the impedance can be represented by an analytic function. A more detailed analysis is performed with a network simulation code. The overall agreement of measured and calculated or simulated spectra is good. Two types of short circuits which appeared are presented and analyzed.The detection limit of the method is discussed. It is concluded that combined highvoltage AC and low voltage impedance spectrum tests are ideal means to rule out short circuits in the W7-X coils.2

show abstract

Transient electrical behaviour of the ITER TF coils during fast discharge and two fault cases

Cited by 11 publications

References 1 publication

Electromagnetic, mechanical and thermal performance analysis of the CFETR magnet system

Electromagnetic, mechanical and thermal performance analysis of the CFETR magnet system

Internal Transient Over-Voltages in Large Fusion Coils

ac modeling and impedance spectrum tests of the superconducting magnetic field coils for the Wendelstein 7-X fusion experiment

Contact Info

Product

Resources

About