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Static actuator-sharing algorithm for concurrent control of multiple plasma properties

Journal Article · · Plasma Physics and Controlled Fusion
 [1];  [1];  [2];  [1]
  1. Lehigh University, Bethlehem, PA (United States)
  2. General Atomics, San Diego, CA (United States)
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Simultaneous regulation of multiple properties in next-generation tokamaks like ITER and fusion pilot plant may require the integration of different plasma control algorithms. Such integration requires the conversion of individual controller commands into physical actuator requests while accounting for the coupling between different plasma properties. This work proposes a tokamak and scenario-agnostic actuator-sharing algorithm (ASA) to perform the above-mentioned command-request conversion and, hence, integrate multiple plasma controllers. The proposed algorithm implicitly solves a quadratic programming (QP) problem formulated to account for the saturation limits and the relation between the controller commands and physical actuator requests. Since the constraints arising in the QP program are linear, the proposed ASA is highly computationally efficient and can be implemented in the tokamak plasma control system in real time. Furthermore, the proposed algorithm is designed to handle real-time changes in the control objectives and actuators’ availability. Nonlinear simulations carried out using the Control Oriented Transport SIMulator illustrate the effectiveness of the proposed algorithm in achieving multiple control objectives simultaneously.
Research Organization:
General Atomics, San Diego, CA (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Fusion Energy Sciences (FES)
Grant/Contract Number:
FC02-04ER54698; SC0010661; SC0021385
OSTI ID:
2478954
Alternate ID(s):
OSTI ID: 2476273
OSTI ID: 2572023
Journal Information:
Plasma Physics and Controlled Fusion, Journal Name: Plasma Physics and Controlled Fusion Journal Issue: 1 Vol. 67; ISSN 0741-3335; ISSN 1361-6587
Publisher:
IOP ScienceCopyright Statement
Country of Publication:
United States
Language:
English

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Nonlinear burn control in ITER using adaptive allocation of actuators with uncertain dynamics journal February 2022
Integrated control of individual plasma scalars with simultaneous neoclassical tearing-mode suppression journal January 2022
Integrated Robust Control of the Global Toroidal Rotation and Total Plasma Energy in Tokamaks journal June 2020
Dynamic Actuator Allocation via Reinforcement Learning for Concurrent Plasma Control Objectives journal January 2024

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Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
actuator allocation
actuator-sharing algorithm
concurrent plasma control
plasma control integration