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research article

Integrated Real-Time Supervisory Management for Off-Normal-Event Handling and Feedback Control of Tokamak Plasmas

Trang Vu  
•
Felici, Federico  
•
Galperti, Cristian  
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August 1, 2021
Ieee Transactions On Nuclear Science

For long-pulse tokamaks, one of the main challenges in the control strategy is to simultaneously reach multiple control objectives and to robustly handle in real-time (RT) unexpected events [off-normal-events (ONEs)] with a limited set of actuators. We have developed in our previous work a generic architecture of the plasma control system to deal with these issues. Due to this generic feature, we are able to extend it with an advanced supervisor: Supervisory control and Actuator Management with ONEs (SAMONE) to deal with multiple ONEs and multiple control scenarios in this work. We first standardize the evaluation of ONEs and, thereby, simplify significantly the supervisor decision logic, as well as facilitate the modifications and extensions of ONE states in the future. Then, we present the recent developments of real-time decision-making by the supervisor to switch between different control scenarios (normal, backup, shutdown, disruption mitigation, and so on) during the discharge based on ONE states. The developed SAMONE has been implemented on the TCV tokamak, applied to disruption avoidance with density limit experiments, demonstrating the excellent capabilities of the new RT integrated strategy.

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Type
research article
DOI
10.1109/TNS.2021.3084410
Web of Science ID

WOS:000687247300046

Author(s)
Trang Vu  
Felici, Federico  
Galperti, Cristian  
Maraschek, Marc
Pau, Alessandro  
Rispoli, Natale
Sauter, Olivier  orcid-logo
Sieglin, Bernhard
Date Issued

2021-08-01

Published in
Ieee Transactions On Nuclear Science
Volume

68

Issue

8

Start page

1855

End page

1861

Subjects

Engineering, Electrical & Electronic

•

Nuclear Science & Technology

•

Engineering

•

actuators

•

plasmas

•

task analysis

•

tokamak devices

•

control systems

•

discharges (electric)

•

real-time systems

•

integrated control

•

off-normal-event (one) handling

•

supervisory control

•

tokamak plasma control system (pcs)

•

control-system

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
SPC  
Available on Infoscience
September 11, 2021
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/181311
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