Effects of the grid breakdowns on the acceleration Grid Power supply of the ITER NBI

Author

Ferro, A. ; Zanotto, L. ; Toigo, V.

Author_Institution

Electr. Syst., EURATOM-ENEA Assoc., Padova, Italy

fYear

2009

fDate

1-5 June 2009

Firstpage

1

Lastpage

4

Abstract

The acceleration grids of the ITER Neutral Beam Injector (NBI) are likely to be subjected to frequent breakdowns. As a consequence, large voltage oscillations arise on the power supply terminals, which could stress the system and may propagate to the power supply. This paper deals with the analyses carried out to assess the impact of such voltage oscillations on the Acceleration Grid Power Supply (AGPS) of the NBI. A detailed high-frequency model of the power supply is setup and simulations are run, with the aim of estimating the voltage and current stresses at the primary side of the AGPS. The results are analyzed and discussed, giving inputs for the design and testing of the equipments.

Keywords

Tokamak devices; fusion reactor ignition; plasma beam injection heating; power supplies to apparatus; AGPS; ITER; NBI; acceleration grid power supply; current stresses; grid breakdown effects; high-frequency model; neutral beam injector; power supply terminals; voltage oscillations; voltage stresses; Acceleration; Electric breakdown; Feeds; Filters; Grounding; Particle beams; Power supplies; Power system modeling; Power transformer insulation; Voltage; ITER; breakdown; neutral beam injector; power supply;

fLanguage

English

Publisher

ieee

Conference_Titel

Fusion Engineering, 2009. SOFE 2009. 23rd IEEE/NPSS Symposium on

Conference_Location

San Diego, CA

Print_ISBN

978-1-4244-2635-5

Electronic_ISBN

978-1-4244-2636-2

Type

conf

DOI

10.1109/FUSION.2009.5226427

Filename

5226427