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P: Fachverband Plasmaphysik
P 5: Helmholtz Graduated School HEPP I
P 5.2: Talk
Monday, March 28, 2022, 16:25–16:50, P-H12
Analysis of multiple MMC submodules operation for future ASDEX Upgrade power supply system integration — •Antonio Magnanimo1, Markus Teschke1, Gerd Griepentrog2, and the ASDEX Upgrade Team1 — 1Max-Planck-Institut für Plasmaphysik, 85748 Garching, Germany — 2Technische Universität Darmstadt, 64283 Darmstadt, Germany
The modular multilevel converter (MMC) has become one of the most attractive converters for high-power applications such as High Voltage DC (HVDC) Power transmission, but also fusion devices power supplies. This converter, thanks to the discrete-leveled output voltage and its identical submodules (SMs) by which it is composed, represents a promising alternative to replace the flywheel generator (FG) that actually provides electrical power to ASDEX Upgrade (AUG) device toroidal field (TF) coils. Due to the pulsed DC operation of these coils and their high power needs (up to 150 MW) for each experiment, a small-scale adapted version of the MMC is under development with some differences compared to conventional ones being used in HVDC systems: SM capacitors have been replaced with supercapacitors (SC) modules to increase the amount of available stored energy while SMs belonging to different arms are interconnected to simplify their control and increase the reliability of the converter. This work shows the operation of four SMs connected in series, parallel and combined series/parallel to demonstrate the scalability of the project, highlighting its advantages, challenges and limits.