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Development of a DC −1 MV insulating transformer for neutral beam injectors
Author(s) -
Watanabe Kazuhiro,
Yamanaka Haruhiko,
Maejima Tetsuya,
Kashiwagi Mieko,
Tobari Hiroyuki,
Inoue Takashi,
Hanada Masaya,
Tanaka Shigeru,
Yamaguchi Kohei,
Kadowaki Makoto
Publication year - 2017
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.22368
Subject(s) - bushing , materials science , transformer , electrical engineering , injector , insulator (electricity) , pulsed power , nuclear engineering , voltage , engineering , optoelectronics , mechanical engineering , composite material
A DC −1 MV insulating transformer has been developed for the power supply of the neutral beam injector ( NBI ) at ITER (International Thermonuclear Experimental Reactor) . A DC long‐pulse −1 MV insulation structure between the primary and secondary windings, considering potential variation in the insulator for DC long pulse, has been designed. Simultaneous development of a compound bushing, which consists of an AC 500 kV condenser bushing inside a cylindrical fiber‐reinforced plastic tube, has been carried out. The DC −1 MV insulation design has been verified by high‐voltage insulation tests of AC 50 Hz 1300 kV peak for 1 min, DC −1200 kV for 1 h, and a long‐duration test of DC −1060 kV for 5 h. The results showed that the insulating transformer satisfies the power supply requirements for the ITER NBI . Copyright © 2016 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.