Search results for "FDU"

showing 3 items of 3 documents

Transient Electrical Behaviour of the TF Superconducting Coils of Divertor Tokamak Test Facility During a Fast Discharge

2022

The paper is focused on the electromagnetic analysis of the Toroidal Field (TF) superconducting coils of the Divertor Tokamak Test facility (DTT) when electrical transients occur in the TF coils system: for example, during the operations of the Fast Discharge Units (FDUs) and considering also, the simultaneous occurrence of a fault condition. During the FDU intervention, a transient voltage excitation lasting few microseconds occurs at the TF coil terminals and it electrically stresses the insulations of TF coils itsef. To investigate the voltage distribution across, inside and between different Double Pancakes (DPs) of each TF coil, a lumped parameters circuital model has been developed an…

Fast DischargeCircuit faultsFDUCondensed Matter PhysicsGround fault conditionsCentral Solenoid Model Coil (CSMC)Electronic Optical and Magnetic MaterialsSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaTransient analysisSettore ING-IND/31 - ElettrotecnicaInsulationIntegrated circuit modelingDischarges (electric)Toroidal Field Model Coil (TFMC)Superconducting magnetsElectrical and Electronic EngineeringVoltage distributionInductanceDTTElectromagnetic modelling
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Design optimization for the quench protection of DTT's superconducting toroidal field magnets

2021

Abstract The paper is focused on the optimal design of Fast Discharge Unit (FDU) for the quench protection of the Toroidal Field (TF) magnets of the Divertor Tokamak Test facility (DTT), an experimental facility under construction in ENEA Frascati Research Centre (Rome, Italy). The FDU is a safety key component that protects the superconducting magnets when a quench is detected through the fast extraction of the energy stored in the magnets by adding a discharge dump resistor (DR) in the TF magnets circuit. A comparison between a fixed DR and a switched variable DR has been implemented by changing resistor parameters and by using multiple current control of the power electronics components …

Linear dischargeTokamakMaterials scienceMechanical EngineeringNuclear engineeringDivertorQuench protectionFDUSuperconducting magnetlaw.inventionSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaSettore ING-IND/31 - ElettrotecnicaDump resistorNuclear Energy and EngineeringPhysics::Plasma PhysicslawElectromagnetic coilMagnetPower electronicsSuperconducting magnetsGeneral Materials ScienceResistorDTTCivil and Structural EngineeringVoltageFusion Engineering and Design
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Conceptual Design and Modeling of Fast Discharge Unit for Quench Protection of Superconducting Toroidal Field Magnets of DTT

2020

The paper deals with the modelling and simulation of a Fast Discharge Unit (FDU) for quench protection of the Toroidal Field (TF) magnets of the Divertor Tokamak Test, an experimental facility under design and construction in Frascati (Italy). The FDU is a safety key component that protects the superconducting magnets when a quench is detected through the fast extraction of the energy stored in superconducting magnets by adding in the TF magnets a dump (or discharge) resistor. In the paper, two different configurations of dump resistors (fixed and variable respectively) have been analysed and discussed. As a first result, it is possible to underline that the configuration with variable dump…

TokamakMaterials scienceNuclear engineeringFDUSuperconducting magnet01 natural sciences010305 fluids & plasmaslaw.inventionhybrid circuit breakerConceptual designPhysics::Plasma Physicslaw0103 physical sciencesdump resisto010306 general physicsSuperconductivityToroidal fieldDivertorquench protectionSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaSettore ING-IND/31 - ElettrotecnicaMagnetPhysics::Accelerator Physicssuperconducting magnetsResistorQPC2020 IEEE 20th Mediterranean Electrotechnical Conference ( MELECON)
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