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  • Grid repercussions caused by the operation of installations supplying electricity for the heating of plasma and the magnetic field of the nuclear fusion experiment W7X


The operation of the W7-X plasma heating devices requires high voltage direct current (DC) power supplies with a total electrical power of 40 MVA. For this purpose twelve-pulse alternating current (AC)/DC converters are projected. These converters enforce a non sinusoidal line current, whose harmonics cause corresponding line voltage distortions. To evaluate the extent of these distortions, the reaction of the harmonic currents on the AC line, is investigated by numerical network analysis. Furthermore the design of the LC series-resonant circuits has been verified. The numerical calculations have been done with the aid of the network simulation program Pspice. In an equivalent circuit the transmission line network and the transformers are represented by their inductances respectively equivalent inductances. The rectifier units are simulated by a number of current sources, producing the current harmonics in amplitude, frequency and phase.

Additional information

Authors: WERNER F, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE)
Bibliographic Reference: Report: DE (1997) 37pp.
Availability: Available from the Max-Planck-Institut für Plasmaphysik, 85748 Garching bei München (DE)
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