Closed loop control of the sawtooth instability in nuclear fusion
conference paper
In nuclear fusion the sawtooth instability is an important plasma phenomenon, having both positive and negative effects on the tokamak plasma. Control of its period is essential in future nuclear fusion reactors. This paper presents a control oriented model of the sawtooth instability, with current drive as input and sawtooth period as output, and validates it with a more extended model and experimental data. This model is numerically implemented and combined with PI-controllers in a feedback loop. Simulations show that closed loop control of the system to a desired sawtooth period is indeed possible, even when time delay is added to the feedback loop. © 2010 AACC.
Topics
Closed-loop controlControl oriented modelsCurrent drivesExperimental dataExtended modelFeed-back loopNuclear fusionPI ControllerPlasma phenomenaPositive and negative effectSawtooth instabilitySawtooth periodsTokamak plasmasDelay control systemsFusion reactorsMagnetoplasmaNuclear energyPlasma diagnosticsPlasma stabilityClosed loop control systems
TNO Identifier
425172
ISBN
9781424474264
Article nr.
No.: 5531394
Source title
2010 American Control Conference, ACC 2010, 30 June 2010 through 2 July 2010, Baltimore, MD. Conference code: 81791
Pages
1979-1984
Files
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