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Title: Feedback control design for non-inductively sustained scenarios in NSTX-U using TRANSP

Abstract

This paper examines a method for real-time control of non-inductively sustained scenarios in NSTX-U by using TRANSP,a time-dependent integrated modeling code for prediction and interpretive analysis of tokamak experimental data, as asimulator. The actuators considered for control in this work are the six neutral beam sources and the plasma boundaryshape. To understand the response of the plasma current, stored energy, and central safety factor to these actuatorsand to enable systematic design of control algorithms, simulations were run in which the actuators were modulated anda linearized dynamic response model was generated. A multi-variable model-based control scheme that accounts for thecoupling and slow dynamics of the system while mitigating the effect of actuator limitations was designed andsimulated. Simulations show that modest changes in the outer gap and heating power can improve the response time ofthe system, reject perturbations, and track target values of the controlled values.

Creator(s)/Author(s):
; ; ; ; ;
Publication Date:
DOE Contract Number:  
AC02-09CH11466
Product Type:
Dataset
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
U. S. Department of Energy
Keywords:
Predictive simulations
OSTI Identifier:
1562090
DOI:
10.11578/1562090

Citation Formats

Boyer, M D, Andre, R G, Gates, D A, Gerhardt, S P, Menard, J E, and Poli, F M. Feedback control design for non-inductively sustained scenarios in NSTX-U using TRANSP. United States: N. p., 2017. Web. doi:10.11578/1562090.
Boyer, M D, Andre, R G, Gates, D A, Gerhardt, S P, Menard, J E, & Poli, F M. Feedback control design for non-inductively sustained scenarios in NSTX-U using TRANSP. United States. doi:10.11578/1562090.
Boyer, M D, Andre, R G, Gates, D A, Gerhardt, S P, Menard, J E, and Poli, F M. 2017. "Feedback control design for non-inductively sustained scenarios in NSTX-U using TRANSP". United States. doi:10.11578/1562090. https://www.osti.gov/servlets/purl/1562090. Pub date:Thu Jun 01 00:00:00 EDT 2017
@article{osti_1562090,
title = {Feedback control design for non-inductively sustained scenarios in NSTX-U using TRANSP},
author = {Boyer, M D and Andre, R G and Gates, D A and Gerhardt, S P and Menard, J E and Poli, F M},
abstractNote = {This paper examines a method for real-time control of non-inductively sustained scenarios in NSTX-U by using TRANSP,a time-dependent integrated modeling code for prediction and interpretive analysis of tokamak experimental data, as asimulator. The actuators considered for control in this work are the six neutral beam sources and the plasma boundaryshape. To understand the response of the plasma current, stored energy, and central safety factor to these actuatorsand to enable systematic design of control algorithms, simulations were run in which the actuators were modulated anda linearized dynamic response model was generated. A multi-variable model-based control scheme that accounts for thecoupling and slow dynamics of the system while mitigating the effect of actuator limitations was designed andsimulated. Simulations show that modest changes in the outer gap and heating power can improve the response time ofthe system, reject perturbations, and track target values of the controlled values.},
doi = {10.11578/1562090},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2017},
month = {6}
}

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