Journal of Nuclear Science, Engineering and Technology (JONSAT)
In cooperation with the Iranian Nuclear Society

Supercapacitors based power supply design for toroidal field coil of upgrade Damavand tokamak

Document Type : Research Paper

Authors

H. Rasouli 1
A.R. Darabi 1
K. Abbaszadeh 2
H. Babaee 1
A.H. Maroufkhani 1

1 Plasma and Nuclear Fusion Research School, Nuclear Science and Technology Research Institute, AEOI, P.O. Box: 14155-1339, Tehran - Iran

2 Faculty of Electrical Engineering, K.N. Toosi University of Technology (KNTU), P.O.BOX: 16315-1355, Tehran, Iran

https://doi.org/10.24200/nst.2023.1377
Abstract
In this study, the current discharge and the power supply system of toroidal field (TF) coils of Damavand tokamak have been designed and simulated to increase the magnetic field time and consequently the plasma duration. Currently, the TF coil current used to form and confine plasma has a sinusoidal half-cycle waveform with a duration of 100ms and a current peak of 12kA which produces a 1.1T magnetic field at the center of the chamber and its flat-top area is about 20ms. With the aim of upgrading Damavand tokamak, in order to increase the plasma duration to 200ms, it is necessary to upgrade the energy supply system and control system of toroidal and poloidal field coil currents. For this purpose, in this paper, the main power supply system has been designed based on super-capacitors with a capacitance of 21F, voltage of 900V, and topology of series-parallel (7*8). Also, to supply and stabilization of TF current, the chopper converter with seven parallel modules with the closed-loop control system with hysteresis controller has been designed and simulated. The general system is capable of supplying and stabilizing the magnetic field from the range of 0.7 to 1.2 Tesla with a ripple of less than 0.2% and a duration of 200ms for the flat area. Also, the charging system of super-capacitors has been designed and simulated using the 12-pulse rectifier converter and the buck converter with the constant current method, which has achieved desirable results.

Highlights

1. A. Lampasi, S. Minucci, Survey of electric power supplies used in nuclear fusion experiments, In: 17th International Conference on Environment and Electrical Engineering, (IEEE, Milan, 2017) 1-6.
 
2. A. Lampasi, et al., A new generation of power supplies for pulsed loads, Fusion Eng. Des., 146, 1921 (2019).
 
3. A. Magnanimo, et al., Supercapacitors-based power supply for ASDEX upgrade toroidal field coils, Fusion Eng. Des., 171, 112574 (2021).
 
4. I. Ciocan, et al., An improved method for the electrical parameters identification of a simplified pspice supercapacitor model, In: 22nd International Symposium for Design and Technology in Electronic Packaging (SIITME), (IEEE, Oradea, Romania, 2016), 171-174.
 
5. G. Maffia, A. Lampasi, P. Zito, A new generation of pulsed power supplies for experimental physics based on supercapacitors, In: 15th International Conference on Environment and Electrical Engineering (EEEIC), (IEEE, Rome, 2015), 1067-1072.
 
6. D.K. Sharma, et al., Multimodular, high current, fast response IGBT inverter power supply of SST-1 tokamak, In: 17th European Conference on Power Electronics and Applications (EPE'15 ECCE-Europe), (IEEE, Geneva, Switzerland, 2015), 1-10.
 
7. A. Sykes, et al., The ST25 Tokamak for rapid technological development, In: 25th Symposium on Fusion Engineering (SOFE), (IEEE, San Francisco, 2013), 1-4.

 

8. M.A. Torres, Coils and power supply design for the small aspect ratio tokamak (SMART) of the university of Seville, M.Sc. Thesis, Fusion Eng. Des., (2020).
 
9. M.A. Torres, et al., Coils and power supplies design for the SMART tokamak, Fusion Eng. Des., 168, 112683 (2021).
 
10. A. Lampasi, et al., Compact power supply with integrated energy storage and recovery capabilities for arbitrary currents up to 2 kA, IEEE Transactions on Plasma Science, 46(10), (2018).
 
11. A. Lampasi, et al., A new generation of power supplies for pulsed loads, Fusion Eng. Des., 146, 1921 (2019).
 
12. S.K. Nielsen, et al., First results from the NORTH tokamak, Fusion Eng. Des., 166, 112288, (2021).
 
13. H. Rasouli, Identification of the neural nonlinear model of the vertical plasma location in the Damavand tokamak and the design of the neural nonlinear controller, Master's Thesis, Khajeh Nasir University of Technology, (2017( (In Persian).
 
14. J. Taheri, C. Rasouli, F.A. Davani, Time-Dependent Thermo-Electro-Magneto-Mechanical Analysis of the TF Coil in Damavand Upgrade Tokamak With Longer Pulse Operation, IEEE Transactions On Plasma Science, 49(1), 424 (2021).
 
15. K. Abbaszadeh, Power-Electronics-Design-&-Analysis, (Publication.kntu, May-2015) (In Persian).
 
16. www. Maxwell.com.
17. www.m.made-in-china.com.

 

Keywords

Toroidal field coil
Damavand tokamak
Power convertor
Supercapacitors
Plasma
1. A. Lampasi, S. Minucci, Survey of electric power supplies used in nuclear fusion experiments, In: 17th International Conference on Environment and Electrical Engineering, (IEEE, Milan, 2017) 1-6.
 
2. A. Lampasi, et al., A new generation of power supplies for pulsed loads, Fusion Eng. Des., 146, 1921 (2019).
 
3. A. Magnanimo, et al., Supercapacitors-based power supply for ASDEX upgrade toroidal field coils, Fusion Eng. Des., 171, 112574 (2021).
 
4. I. Ciocan, et al., An improved method for the electrical parameters identification of a simplified pspice supercapacitor model, In: 22nd International Symposium for Design and Technology in Electronic Packaging (SIITME), (IEEE, Oradea, Romania, 2016), 171-174.
 
5. G. Maffia, A. Lampasi, P. Zito, A new generation of pulsed power supplies for experimental physics based on supercapacitors, In: 15th International Conference on Environment and Electrical Engineering (EEEIC), (IEEE, Rome, 2015), 1067-1072.
 
6. D.K. Sharma, et al., Multimodular, high current, fast response IGBT inverter power supply of SST-1 tokamak, In: 17th European Conference on Power Electronics and Applications (EPE'15 ECCE-Europe), (IEEE, Geneva, Switzerland, 2015), 1-10.
 
7. A. Sykes, et al., The ST25 Tokamak for rapid technological development, In: 25th Symposium on Fusion Engineering (SOFE), (IEEE, San Francisco, 2013), 1-4.
 
8. M.A. Torres, Coils and power supply design for the small aspect ratio tokamak (SMART) of the university of Seville, M.Sc. Thesis, Fusion Eng. Des., (2020).
 
9. M.A. Torres, et al., Coils and power supplies design for the SMART tokamak, Fusion Eng. Des., 168, 112683 (2021).
 
10. A. Lampasi, et al., Compact power supply with integrated energy storage and recovery capabilities for arbitrary currents up to 2 kA, IEEE Transactions on Plasma Science, 46(10), (2018).
 
11. A. Lampasi, et al., A new generation of power supplies for pulsed loads, Fusion Eng. Des., 146, 1921 (2019).
 
12. S.K. Nielsen, et al., First results from the NORTH tokamak, Fusion Eng. Des., 166, 112288, (2021).
 
13. H. Rasouli, Identification of the neural nonlinear model of the vertical plasma location in the Damavand tokamak and the design of the neural nonlinear controller, Master's Thesis, Khajeh Nasir University of Technology, (2017( (In Persian).
 
14. J. Taheri, C. Rasouli, F.A. Davani, Time-Dependent Thermo-Electro-Magneto-Mechanical Analysis of the TF Coil in Damavand Upgrade Tokamak With Longer Pulse Operation, IEEE Transactions On Plasma Science, 49(1), 424 (2021).
 
15. K. Abbaszadeh, Power-Electronics-Design-&-Analysis, (Publication.kntu, May-2015) (In Persian).
 
16. www. Maxwell.com.
17. www.m.made-in-china.com.
 

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