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

Dataset · Thu Jun 01 04:00:00 EDT 2017

DOI:https://doi.org/10.11578/1562090· OSTI ID:1562090

Boyer, M D ^[1]; Andre, R G; Gates, D A; Gerhardt, S P; Menard, J E; Poli, F M

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1. OSTI

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.

• Research Organization: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
• Sponsoring Organization: U. S. Department of Energy
• DOE Contract Number: AC02-09CH11466
• OSTI ID: 1562090
• Country of Publication: United States
• Language: English

Related Subjects

Predictive simulations