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Mons Hölleland

Mats Leijon

Bertil Berggren

Lars Gertmar

Peter Templin

Gunnar Kylander

Peter Carstensen

Bertil Larsson

Sören Berggren

Claes Ivarson

Erland Sörensen

Bengt Rydholm

Jan-Anders Nygren

Bo Hernnäs

Hans-Olof Kalldin

Gunnar Davidsson

In a plant containing a turbo-generator the magnetic circuit of the turbo-generator is included in an electric generator which directly supplies a high supply voltage of 20-800 kV, preferably higher than 36 kV. The insulation of the generator is built up of a cable () comprising one or more current-carrying conductors () with a number of strands () surrounded by outer and inner semiconducting layers () and intermediate insulating layers (). The outer semiconducting layer () is at earth potential. The phases of the winding are Y-connected. The Y-point may be insulated and protected from over-voltage by means of surge arresters, or else the Y-point may be earthed via a suppression filter.

Turbo generator plant with a high voltage electric generator

The magnetic circuit of a generator in a hydro-generator plant is arranged to directly supply a high supply voltage of 20-800 kV, preferably higher than 36 kV. The generator is provided with solid insulation and its winding includes a cable () comprising one or more current-carrying conductors () with a number of strands () surrounded by at least one outer and one inner semiconducting layer () and intermediate insulating layers (). The outer semiconducting layer () is at earth potential. The stator winding may be produced with full or fractional slot winding, the phases of the winding being Y-connected. The Y-point may be insulated and protected from over-voltage by means of surge arresters, or else the Y-point may be earthed via a suppression filter. The invention also relates to a hydro-generator plant, a generator included in the plant and a procedure for building such a plant.

Hydro-generator plant

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Västerås, Sweden

Mons Hölleland