Title :
DIII-D ICRF high voltage power supply regulator upgrade
Author :
Cary, W.P. ; Burley, B.L. ; Grosnickle, W.H.
Author_Institution :
Gen. Atomics, San Diego, CA, USA
Abstract :
For reliable operation and component protection, of the 2 MW 30-120 MHz ICRF amplifier system on DIII-D, it is desirable for the amplifier to respond to high VSWR conditions as rapidly as possible. This requires a rapid change in power which also means a rapid change in the high voltage power supply current demands. An analysis of the power supply´s regulator dynamics was needed to verify its expected operation during such conditions. Based on this information it was found that a new regulator with a larger dynamic range and some anticipation capability would be required. This paper will discuss the system requirements, the as delivered regulator performance, and the improved performance after installation of the new regulator system. It will also be shown how this improvement has made the amplifier perform at higher power levels more reliably
Keywords :
fusion reactor design; fusion reactor ignition; fusion reactor operation; load regulation; plasma radiofrequency heating; plasma toroidal confinement; power supplies to apparatus; radiofrequency amplifiers; 2 MW; 30 to 120 MHz; DIII-D ICRF high voltage power supply regulator upgrade; ICRF amplifier system; anticipation capability; component protection; fusion reactors; high VSWR conditions; ion cyclotron resonance heating; reliable operation; system requirements; Anodes; Circuits; High power amplifiers; Operational amplifiers; Power supplies; Power system reliability; Protection; Regulators; Thyristors; Voltage;
Conference_Titel :
Fusion Engineering, 1997. 17th IEEE/NPSS Symposium
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-4226-7
DOI :
10.1109/FUSION.1997.687079
