Abb Ab

Asea Brown Boveri Ab

Hitachi Energy Switzerland Ag

Sören Berggren

Mats Leijon

Bertil Berggren

Lars Gertmar

Peter Templin

Peter Carstensen

Gunnar Kylander

Bertil Larsson

Erland Sörensen

Claes Ivarson

Mons Hölleland

Bengt Rydholm

Jan Lundquist

Jan-Anders Nygren

Bertil Moritz

Bo Hernnäs

Hans-Olof Kalldin

Bjorn Lindberg

Gunnar Davidsson

Gunnar Hellstrom

Jonas Engstrom

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

A cable forerunner for winding a high-voltage cable in an electric machine, wherein one end of the cable forerunner (,) is attached to the end (,) of the cable (,), the cable forerunner (,) is arranged to draw the cable (,) through a first slot (,) arranged in the machine body (,) and also to control the curvature of the cable (,) at its exit from the slot (,) unitl its entry into a second slot (,) arranged in the machine body (,), as well as a procedure and also an electric machine having at least one winding comprising a high-voltage cable wound in accordance with the procedure for winding a high-voltage cable (,) in an electric machine, wherein one end of the cable forerunner (,) is attached to the end of the cable (,), whereafter the cable forerunner (,) is caused to draw the cable (,) through a first slot (,) arranged in the machine body (,) and to control the curvature of the cable (,) at its exit from the slot until its entry into a second slot (,) arranged in the machine body (,).

Cable forerunner

Surge arrester

Growing community of inventors

Västerås, Sweden

Sören Berggren