Power Electronics Converters employed in nuclear fusion applications have been recently assuming a crucial role for reactors' coils power supply systems as they are particularly challenging not only due to the very high current amplitude, but also to guarantee a proper plasma acceleration and its magnetic confinement for tens of years. To face such demanding requirements, with focus on the Poloidal Field Power Supplies of the Divertor Tokamak Test (DTT) facility, this paper analyzes a parallel-connected H-Bridges (HBs) DCDC converter characterized by relatively low voltages and very high current ratings (tens of kA), quite unusual in industry applications. A specific mathematical model, including the high frequency disturbances identification, has been pointed out for the first time in literature. A current control strategy, which aims at maximizing the current sharing among all HBs legs, is proposed as well. The simulation results have confirmed the validity of the presented control by keeping the load current error below 0.015% and by correctly balancing each HB leg current. These results have been furtherly validated through a Hardware-in-the-loop test facility.

Terlizzi, C., Bifaretti, S., Lampasi, A. (2021). Current Sharing Control Strategy for parallel-connected H-Bridges DC-DC Converter: Modelling, Analysis and HIL test. In 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings (pp.2777-2783). Institute of Electrical and Electronics Engineers Inc. [10.1109/ECCE47101.2021.9595565].

Current Sharing Control Strategy for parallel-connected H-Bridges DC-DC Converter: Modelling, Analysis and HIL test

Bifaretti S.;
2021-10-01

Abstract

Power Electronics Converters employed in nuclear fusion applications have been recently assuming a crucial role for reactors' coils power supply systems as they are particularly challenging not only due to the very high current amplitude, but also to guarantee a proper plasma acceleration and its magnetic confinement for tens of years. To face such demanding requirements, with focus on the Poloidal Field Power Supplies of the Divertor Tokamak Test (DTT) facility, this paper analyzes a parallel-connected H-Bridges (HBs) DCDC converter characterized by relatively low voltages and very high current ratings (tens of kA), quite unusual in industry applications. A specific mathematical model, including the high frequency disturbances identification, has been pointed out for the first time in literature. A current control strategy, which aims at maximizing the current sharing among all HBs legs, is proposed as well. The simulation results have confirmed the validity of the presented control by keeping the load current error below 0.015% and by correctly balancing each HB leg current. These results have been furtherly validated through a Hardware-in-the-loop test facility.
13th IEEE Energy Conversion Congress and Exposition, ECCE 2021
can
2021
IEEE
Rilevanza internazionale
contributo
ott-2021
Settore ING-IND/32 - CONVERTITORI, MACCHINE E AZIONAMENTI ELETTRICI
English
Balancing controller
Current sharing
Divertor Tokamak Test facility
Equivalent model
Hardware-in-the-loop
Parallel converter
Intervento a convegno
Terlizzi, C., Bifaretti, S., Lampasi, A. (2021). Current Sharing Control Strategy for parallel-connected H-Bridges DC-DC Converter: Modelling, Analysis and HIL test. In 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings (pp.2777-2783). Institute of Electrical and Electronics Engineers Inc. [10.1109/ECCE47101.2021.9595565].
Terlizzi, C; Bifaretti, S; Lampasi, A
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/295157
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 12
  • ???jsp.display-item.citation.isi??? 8
social impact