29th Symposium on Fusion Technology (SOFT 2016)

O1C.2 Initial Operation of 3 MW Dual Output High Voltage Power Supply with IC RF System

5 Sep 2016, 17:00

20m

Meeting Hall V 2nd floor (Prague Congress Centre)

Board: 2

Oral E. Magnets and Power Supplies O1C

Speaker

N. P. Singh (ITER-India)

Description

Pulse Step Modulation (PSM) based High Voltage Power Supply (HVPS) are widely used in applications viz. Broadcast transmitters, Particle accelerators and Neutral Beam Injectors because of inherent advantages of modular structure, high accuracy and efficiency, low ripple and fast dynamics. Typical IC RF system composed of cascaded connection of Driver stage (70 kW RF output) and End stage (1500 kW RF Output) would need two power supplies. A novel concept of tapping two outputs from single PSM based HVPS is attempted for the first time. PSM based 3MW HVPS is developed with dual output to feed anode voltage of Driver (up to 18kV) and Final Stage (up to 27kV). Controller for the HVPS is designed to suit requirements during local operation and remote operation. In Local operation mode, protection interlocks with in the HVPS are integrated while remote mode has additional interlocks from IC RF Amplifiers system. Field integration of the Controller is achieved through Fiber optical links to avoid EM interferences. Present article discusses initial experience of dual output HVPS with IC RF amplifiers, pre-integration validation campaigns including qualification for energy limits. The paper also presents the performance of HVPS at full rated capacity of 2800kW continuous duty to support 1.5 MW IC RF system.