Event generation and simulation of exception handling with the ITER PCSSP

Raupp, G.; Walker, M.L.; Ambrosino, G.; Tommasi, G. De; Humphreys, D.A.; Mattei, M.; Neu, G.; Treutterer, W.; Winter, A.

doi:10.1016/j.fusengdes.2014.04.068

Cited by 14 publications

(6 citation statements)

References 14 publications

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“…a transport solver with free boundary equilibrium capability (and later including also scrape-off-layer and plasma-wall interaction modelling). This plasma simulator, used in conjunction with the plasma control system simulation platform (PCSSP) [9][10][11], forms a full tokamak simulator allowing developing control strategies. This tool is planned to be used systematically as part of the pulse validation procedure, a requisite prior to the execution of any pulse on the real ITER experiment.…”

Section: Imas First Physics Applicationsmentioning

confidence: 99%

“…In this section, we describe a technical development allowing co-simulation between the tokamak plant simulator (implemented under IMAS) and the plasma control system simulator (implemented under a separate platform, named the Plasma Control System simulation platform (PCSSP) [9][10][11]). The full tokamak simulator represented in figure 2 is thus implemented using two different workflow engines for IMAS and the PCSSP, respectively Kepler and Simulink ® [21].…”

Section: Co-simulation With the Plasma Control System Simulation Platmentioning

confidence: 99%

See 1 more Smart Citation

Design and first applications of the ITER integrated modelling & analysis suite

Imbeaux¹,

Pinches²,

Lister³

et al. 2015

Nucl. Fusion

120

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The ITER Integrated Modelling & Analysis Suite (IMAS) will support both plasma operation and research activities on the ITER tokamak experiment. The IMAS will be accessible to all ITER members as a key tool for the scientific exploitation of ITER. The backbone of the IMAS infrastructure is a standardized, machine-generic data model that represents simulated and experimental data with identical structures. The other outcomes of the IMAS design and prototyping phase are a set of tools to access data and design integrated modelling workflows, as well as first plasma simulators workflows and components implemented with various degrees of modularity.

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Section: Imas First Physics Applicationsmentioning

confidence: 99%

Section: Co-simulation With the Plasma Control System Simulation Platmentioning

confidence: 99%

Design and first applications of the ITER integrated modelling & analysis suite

Imbeaux¹,

Pinches²,

Lister³

et al. 2015

Nucl. Fusion

120

View full text Add to dashboard Cite

show abstract

“…PCSSP provides a method for prototyping and evaluating candidate architecture and controller solutions with minimal coding effort. In particular, the Plant simulation will contain an event generator (EG) module that can trigger simulated performancechallenging plasma and hardware events (known as exceptions) during control simulation, to evaluate the ability of the EH to handle them [13]. It will also contain a model of the Central Interlock System (CIS), which can be used to test the interaction of the PCS and CIS in responding to events occurring in the Plant [14].…”

Section: The Vision For Pcsspmentioning

confidence: 99%

“…The Event Generator and Exception Handler functions are sufficiently large and novel developments that they are described in a separate paper [13].…”

Section: Architecture Overviewsmentioning

confidence: 99%

A simulation environment for ITER PCS development

Walker

Ambrosino

Tommasi

et al. 2014

Fusion Engineering and Design

Self Cite

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A simulation environment known as the Plasma Control System Simulation Platform (PCSSP), specifically designed to support development of the ITER Plasma Control System (PCS), is currently under construction by an international team encompassing a cross-section of expertise in simulation and exception handling for plasma control. The proposed design addresses the challenging requirements of supporting the PCS design. This paper provides an overview of the PCSSP project and a discussion of some of the major features of its design. Plasma control for the ITER tokamak will be significantly more challenging than for existing fusion devices. An order of magnitude greater performance is needed for some types of control, which together with limited actuator authority, implies that optimized individual controllers and nonlinear saturation logic are required. At the same time, consequences of control failure are significantly more severe, which implies a conflicting requirement for robust control. It also implies a requirement for comprehensive and robust exception handling. Coordinated control of multiple competing objectives with significant interactions, together with many shared uses of actuators to control multiple variables, implies that highly integrated control logic and shared actuator management will be required. It remains a challenge for the integrated technologies to simultaneously address these multiple and often competing requirements to be demonstrated on existing fusion devices and adapted for ITER in time to support its operational schedule. We describe ways in which the PCSSP will help address these challenges to support design of both the ITER PCS itself and the algorithms that will be implemented therein. and at the same time greatly reduce the cost of that development. We summarize the current status of the PCSSP design task, including system requirements and preliminary design documents already delivered as well as features of the ongoing detailed architectural design. The methods being incorporated in the detailed design are based on prior experience with control simulation environments in fusion and on standard practices prevalent in development of control-intensive industrial product designs.

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“…ToreSupra based its GMFS flight simulator on a SciCos-Kepler framework [16,17]. The TokSys environment developed at DIII-D [18] and implemented in Simulinkâ the gave inspiration to ITER's Plasma Control System Simulation Platform (PCSSP) [19][20][21][22], which is continuously being developed further and customizable to any fusion device.…”

Section: Introductionmentioning

confidence: 99%

Concepts of the new ASDEX Upgrade flight simulator

Treutterer

Fable

Gräter

et al. 2019

Fusion Engineering and Design

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Discharge scenarios and control schemes in ASDEX Upgrade (AUG) are evolving more and more complex. Especially in physics investigations for ITER and DEMO sophisticated scenarios exploit the operational space. This increases the probability of design flaws or human errors in the pulse configuration, but also aggravates the potential damage in the failure case. The ASDEX Upgrade Flight Simulator Fenix, which is currently under construction, will provide a fast and efficient simulation tool for testing and validating discharge scenarios, as well as control and monitoring functions, during their development and immediately prior to experimental pulse execution. This ensures, that the scenarios and settings are adequate to reach the experimental goals and that the margins to operational limits are sufficiently large also during the dynamic evolution of the discharge. Simplified physics and plant system "control" models combined with a representation of the ASDEX Upgrade Discharge Control System (DCS) allow for fast simulation runs with reasonable prediction quality. In the simulation an event generator can trigger plasma instabilities, technical failures and external events to test the resilience of the designed pulse against unplanned incidents. The granularity of modelling shall be customizable, such that the simulator can also be used for detail investigations with elaborate physics at the cost of longer simulation time. As a basis for implementation the ITER Plasma Control System Simulation Platform (PCSSP) has been chosen. The flight simulator, extends PCSSP with an ASTRA co-simulator for the ASDEX Upgrade tokamak model and with custom modules for its actuators, diagnostics and control system. Plugins will enable reading original AUG discharge programs and configuration files, as well as storing the results in the AUG shot file database.

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Event generation and simulation of exception handling with the ITER PCSSP

Cited by 14 publications

References 14 publications

Design and first applications of the ITER integrated modelling & analysis suite

Design and first applications of the ITER integrated modelling & analysis suite

A simulation environment for ITER PCS development

Concepts of the new ASDEX Upgrade flight simulator

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