Title :
Suppression of slot discharges in a cable wound generator
Author :
Touma-Holmberg, Marguerite ; Hjarne, Stig
Author_Institution :
Alstom Power, Vasteras, Sweden
Abstract :
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.
Keywords :
discharges (electric); machine insulation; power cable insulation; power cables; power transformers; stators; synchronous generators; 136 kV; 42 MVA; Eskilstuna; Sweden; cable wound generator; currents distribution calculation; high-voltage turbo Powerformer; insulating/semiconducting fixation hose; semiconducting layer; slot discharges suppression; stator slot wall; synchronous machine; voltages distribution calculation; Cable insulation; Coatings; Conductors; Dielectrics and electrical insulation; Power cable insulation; Power cables; Semiconductivity; Stators; Voltage; Wounds;
Journal_Title :
Energy Conversion, IEEE Transactions on
DOI :
10.1109/TEC.2003.815855
