INTERNAL BEHAVIOUR OF LARGE COILS SUBJECT TO TRANSIENT VOLTAGE

This paper deals with the problem of internal overvoltages within large coils due to fast-rising surges. Numerical simulations are performed on a lumped-parameter equivalent circuit, representing a coil of the magnetic system of a thermo-nuclear fusion experiment. Inductances and capacitances are co...

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Bibliographic Details
Published in:Compel 1992-01, Vol.11 (1), p.229-232
Main Authors: Campostrini, P.P., Chitarin, G., Stella, A., Zollino, G.
Format: Article
Language:English
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Summary:This paper deals with the problem of internal overvoltages within large coils due to fast-rising surges. Numerical simulations are performed on a lumped-parameter equivalent circuit, representing a coil of the magnetic system of a thermo-nuclear fusion experiment. Inductances and capacitances are computed through numerical methods which ensure a good precision even with complex geometries. The effect of the conductive painting on the outer surface of the coil is also taken into account. The simulation results are compared with a number of measurements on a full-size prototype coil. Turn-to-earth, as well as inter-turn overvoltages, are both computed and measured in many grounding conditions. The experimental results fit well with computation and theoretical prediction.
ISSN:0332-1649
2054-5606
DOI:10.1108/eb051794