D R A F T - 16-Jan-2006
WBS 5.2 ELECTRON CYCLOTRON HEATING & CURRENT DRIVE

Power Supply for EC H&CD

Procurement Package 5.2-4
"Power Supply"
ITER Cost 2001 for Sharing: 13.90 kIUA
Sharing: EU = 92%; India = 8%
Function, Scope of Supply:

The operation of a CPD (Collector Potential Depressed) gyrotron requires a main high voltage power supply (PS) of about -50 to - 60 kV (grounded anode to cathode) and 40 A for (1 MW RF power), while the full acceleration voltage (typically 80 to 90 kV,) is achieved by means of a smaller PS, Acceleration or Body PS (BPS), ca 150 mA DC, operating on a mainly capacitive load, also capable of modulating with accuracy its output voltage up to frequencies of, typically, 5 kHz.
Fast switch-off time must be ensured to limit within 10 J the energy deposited in arcs inside the gyrotron.
The ITER reference scheme is based on two “big” main PS each feeding twelve 1 MW gyrotrons. Each gyrotron is provided with its own individual BPS. Since the actual procurement specifications for the PS will be “functional” ones, the final PS topology may in fact be subjected to changes.

Description, Technologies :

Main elements of an electric power supply: transformers, rectifiers, thyristors, filters, fast switches-off and measurement equipment.

Main EIDI Activities Codes
20200
POWER TRANSFORMERS FOR AC DISTRIBUTION
20100
SWITCHGEAR AND DISTRIBUTION BOARDS (HV = > 36kV, MV = > 1kV & < 36kV, LV = < 1 kV)
20300
POWER CABLES, BUSBARS AND ACCESSORIES (HV = > 36kV, MV = > 1kV & < 36kV, LV = < 1 kV)
20400
CONTROL AND COMMUNICATION CABLES
21000
STANDARD INDUSTRIAL MEASUREMENTS, CONTROL, AND REGULATION
21100
MISCELLANEOUS / ELECTRICAL ENGINEERING (HV = > 36kV, MV = > 1kV & < 36kV, LV = < 1 kV)
21200
COMPONENTS FOR ELECTRICAL ENGINEERING (HV = > 36kV, MV = > 1kV & < 36kV, LV = < 1 kV)