Electrical Design Requirements on the ITER Coils

Libeyre, P.; Bareyt, B.; Benfatto, I.; Bessette, D.; Gribov, Y.; Mitchell, N.; Sborchia, C.; Simon, Fabrice

doi:10.1109/tasc.2008.920788

Cited by 27 publications

(6 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However the voltage difference between two coils is a function of the difference of the flux variations only. If all are equal (according to (2), the voltage difference between coils is zero).…”

Section: Reaction Of Tf Coils To Inductive Flux Variationsmentioning

confidence: 99%

See 1 more Smart Citation

Investigations About Quench Detection in the ITER TF Coil System

Coatanea

Duchateau

Nicollet

et al. 2012

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

22nd International Conference on Magnet Technology (MT), ITER Org, Marseille, FRANCE, SEP 12-16, 2011International audienceDue to the large stored energy (40 GJ) and the small allowed number of fast discharges (50), severe requirements have been put in the ITER project for the Toroidal Field (TF) coil system in comparison with the Poloidal Field (PF) and Central Solenoid (CS) systems, aiming at avoiding any fast discharge not related to a quench. A very important point, which has to be examined, is whether a quench detection based on a co-wound tape, recommended in the ITER project, and located inside the conductor insulation is compulsory to ensure the inductive voltage compensation. Another possible solution is the balance of the voltage of TF coils or TF coils subcomponents. The sensitivity of the quench detection systems is examined according to the different types of flux variations experienced in the machine. During plasma discharge, the sensitivity to poloidal flux variations and plasma paramagnetism is highlighted, the last effect being illustrated for Tore Supra. It is eventually recommended to select the quench detection by balancing coils or coils subcomponents. This solution has been adopted for Tore Supra, KSTAR and in JT-60SA project. The level of refinement should be adjusted during commissioning, as a function of the required voltage detection level (0.4 V) and to the required holding time (1 s)

show abstract

Section: Reaction Of Tf Coils To Inductive Flux Variationsmentioning

confidence: 99%

“…Assuming that all coils are identical with no vertical inclination (see Section II), it is possible to calculate the expected TF current variation due to the paramagnetism of the plasma according to (2):…”

Section: Whenmentioning

confidence: 99%

Investigations About Quench Detection in the ITER TF Coil System

Coatanea

Duchateau

Nicollet

et al. 2012

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

show abstract

“…The detailed information about the calculation strategy, the design of the PF and CS coils, their power supplies and electrical [7] circuits and also about the detailed FEM and network models of the PF 3 and PF 6 coils is given in [3].…”

Section: Calculation Strategymentioning

confidence: 99%

“…3. Due to the specified fault of the freewheeling switch of AC/DC converter the coils were still driven with the DC converter voltage According to [7] the maximum voltage on the terminals of the PF coils for fault conditions is considered to be 23.2 kV. Both failure cases specified by the ITER power supply group in [6] were different than the fault conditions defined in [7].…”

Section: Calculated Voltage Waveforms On the Terminals Of The Pfmentioning

confidence: 99%

Transient Electrical Voltages Within ITER Poloidal Field Coils

Winkler

Fietz

Fink

et al. 2012

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

High-voltage insulation co-ordination of the coil system is essential for reliable operation of ITER. Transient electrical excitations occur on the terminals of superconducting coils, for example in case of a fast discharge of the coils and if a failure occurs within the components of the electrical circuit. Transient voltage on the coil terminals may lead to non-linear voltage distribution and oscillations within large superconducting coils because of their large dimensions and high number of turns. Thus, the internal voltages may even be higher than the voltages on the coil terminals. This effect depends on the rise time of the excitations and was measured within the ITER Toroidal Field Model Coil which is about three times smaller than the ITER toroidal field (TF) coil. The calculations of the transient electrical behavior of the coils provide a basis for high-voltage insulation co-ordination and definition of test voltages and waveforms. The high voltage tests during the manufacturing process will control the quality of the electrical insulation and ensure reliable operation of the coils. The transient electrical behavior of ITER poloidal field (PF) coils was calculated using the PF 3 and PF 6 coils as examples.Maximum voltages for ground, layer and turn insulation were calculated for four scenarios. Results of these calculations are presented in detail in this paper.Index Terms-Finite element methods and network calculations, high voltage techniques, magnets.

show abstract

“…The magnet system of ITER consists several superconducting coils [2,3] powered by a complex coil power supply and distribution system [4]. And Poloidal Field (PF) coil power supply system is a key part of it and used to power the PF coils which generate the PF scenario and control the plasma shape and position [5].…”

Section: Introductionmentioning

confidence: 99%

Transient Magnetic Field Analysis of PF Converter Unit

Yang

Song

et al. 2014

J Fusion Energ

View full text Add to dashboard Cite

This paper presents the transient magnetic field analysis for PF converter unit. Different short circuit conditions and different magnetic field sources are considered in the analysis. An analysis model is built for each magnetic field source first. And then a magnetic field analysis is performed for the worst short circuit condition. The analysis results presented in this paper will be a very important reference for the confirmation of EMC test level and the EMC design of instrument and control systems.

show abstract

Electrical Design Requirements on the ITER Coils

Cited by 27 publications

References 3 publications

Investigations About Quench Detection in the ITER TF Coil System

Investigations About Quench Detection in the ITER TF Coil System

Transient Electrical Voltages Within ITER Poloidal Field Coils

Transient Magnetic Field Analysis of PF Converter Unit

Contact Info

Product

Resources

About