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  4. Real Time Hybrid Model Predictive Control for the Current Profile of the Tokamak a Configuration Variable (TCV)
 
research article

Real Time Hybrid Model Predictive Control for the Current Profile of the Tokamak a Configuration Variable (TCV)

Garrido, Izaskun
•
Garrido, Aitor J.
•
Coda, Stefano
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2016
Energies

Plasma stability is one of the obstacles in the path to the successful operation of fusion devices. Numerical control-oriented codes as it is the case of the widely accepted RZIp may be used within Tokamak simulations. The novelty of this article relies in the hierarchical development of a dynamic control loop. It is based on a current profile Model Predictive Control (MPC) algorithm within a multiloop structure, where a MPC is developed at each step so as to improve the Proportional Integral Derivative (PID) global scheme. The inner control loop is composed of a PID-based controller that acts over the Multiple Input Multiple Output (MIMO) system resulting from the RZIp plasma model of the Tokamak a Configuration Variable (TCV). The coefficients of this PID controller are initially tuned using an eigenmode reduction over the passive structure model. The control action corresponding to the state of interest is then optimized in the outer MPC loop. For the sake of comparison, both the traditionally used PID global controller as well as the multiloop enhanced MPC are applied to the same TCV shot. The results show that the proposed control algorithm presents a superior performance over the conventional PID algorithm in terms of convergence. Furthermore, this enhanced MPC algorithm contributes to extend the discharge length and to overcome the limited power availability restrictions that hinder the performance of advanced tokamaks.

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Type
research article
DOI
10.3390/en9080609
Web of Science ID

WOS:000383547400039

Author(s)
Garrido, Izaskun
•
Garrido, Aitor J.
•
Coda, Stefano
•
Le, Hoang B.
•
Moret, Jean Marc
Date Issued

2016

Published in
Energies
Volume

9

Issue

8

Start page

609

Subjects

model predictive control

•

multiloop control

•

fusion reactors

•

plasma control

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
SPC  
Available on Infoscience
October 18, 2016
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/130385
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