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Suppression of slot discharges in a cable wound generator

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2 Author(s)
Touma-Holmberg, M. ; Alstom Power, Vasteras, Sweden ; Hjarne, S.

This paper presents a detailed mathematical study to calculate the distribution of the voltages and currents developed on the semiconducting layer of the cable having many points of contact with the stator slot wall and an insulating/semiconducting fixation hose. The calculations are verified experimentally on the world's first high-voltage turbo Powerformer installed in Eskilstuna, Sweden, and rated at 136 kV and 42 MVA.

Published in:

Energy Conversion, IEEE Transactions on  (Volume:18 ,  Issue: 3 )