The system of electrodes of the uniform field of stator slot and the insulation of high-voltage turbo- and hydrogenerators

Abstract

The system of electrodes of the uniform field of the slot of high-voltage turbo- and hydrogenerators is designed and investigated. This system is determined as a result of the investigation of the mutual distribution of equigradient and equipotential lines of the electric field in the interelectrode space of the stator slot. By applying the profile of the uniform field, the nonuniform part of the field with high strength is excluded. It helps to increase the insulation strength. "Life term" of the bars with the full field reduction was higher than for similar bars with a partial reduction. The system of electrodes of the uniform field is designed for the stator winding of turbogenerators at the rated voltage 36-60 kV and for the hydrogenerators of special manufacture at the extra high rated voltage 220 kV.