Magnanimo, Antonio (2023)
Supercapacitors-based Pulsed Power Supply for the ASDEX Upgrade Toroidal Field Coil.
Technische Universität Darmstadt
doi: 10.26083/tuprints-00024412
Ph.D. Thesis, Primary publication, Publisher's Version
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Item Type: | Ph.D. Thesis | ||||
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Type of entry: | Primary publication | ||||
Title: | Supercapacitors-based Pulsed Power Supply for the ASDEX Upgrade Toroidal Field Coil | ||||
Language: | English | ||||
Referees: | Griepentrog, Prof. Dr. Gerd ; Heldwein, Prof. Dr. Marcelo | ||||
Date: | 14 August 2023 | ||||
Place of Publication: | Darmstadt | ||||
Collation: | xxx, 111 Seiten | ||||
Date of oral examination: | 28 June 2023 | ||||
DOI: | 10.26083/tuprints-00024412 | ||||
Abstract: | ASDEX Upgrade is an experimental tokamak where the physics of nuclear fusion relevant plasmas is studied. Its electrical power is provided by three flywheel generators that are charged up before the start of each experiment with up to 15 MW for several minutes. The stored energy is then used to satisfy the high power needs during an experiment - called plasma pulse - of up to 450 MVA. The largest one of the three flywheel generators could not be replaced in case of a major fault because currently there are no comparable devices available on the free market. Therefore, the development of an alternative power supply system with high power and energy and fully controllable output is planned. Supercapacitors are well known for their very high specific power. Combining this technology with a proper power converter topology such as the modular multilevel converter, it would be possible to feed the coils of future tokamaks with higher performance and reliability. This topology, indeed, allows a discrete-leveled output voltage and, thanks to its high modules number, it can operate continuously even in case of fault of some of them, while a flywheel generator could not. This dissertation shows the concept of the mentioned power supply, highlighting advantages and challenges compared to existing technologies, focusing on reliability, scalability and flexibility with the idea of adapting this solution even for different applications in the future. Furthermore, a small-scale demonstrator composed by four identical modules has been built, and it has been tested in three different configurations: serial, parallel and combined serial/parallel. The serial configuration has been tested to validate the developed control strategy, the parallel one is fundamental for the scalability of the system and the last configuration validated their combination. The experimental results are shown and compared with simulations, and finally a clearer picture about the scalability of the system was developed. |
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Status: | Publisher's Version | ||||
URN: | urn:nbn:de:tuda-tuprints-244120 | ||||
Classification DDC: | 600 Technology, medicine, applied sciences > 621.3 Electrical engineering, electronics | ||||
Divisions: | 18 Department of Electrical Engineering and Information Technology > Institute for Power Electronics and Control of Drives | ||||
Date Deposited: | 14 Aug 2023 12:07 | ||||
Last Modified: | 05 Dec 2023 06:11 | ||||
URI: | https://tuprints.ulb.tu-darmstadt.de/id/eprint/24412 | ||||
PPN: | 510610226 | ||||
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