Turbo generator plant with a high voltage electric generator
First Claim
1. A plant for generating active and reactive electric power for a high-voltage distribution or transmission network, comprising at least one of a gas and steam turbine coupled via a shaft means to at least one electric generator for generating a high voltage, said electric generator including at least one flexible winding comprising a conductor formed of a plurality of insulated strands and a lesser plurality of uninsulated strands, an insulation system including an inner semiconducting layer surrounding the conductor, a solid insulation surrounding the inner semiconducting layer and an outer semiconducting layer surrounding the solid insulation layer, said inner layer and said outer layer each forming an equipotential surface.
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Accused Products
Abstract
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 (6) comprising one or more current-carrying conductors (31) with a number of strands (36) surrounded by outer and inner semiconducting layers (34, 32) and intermediate insulating layers (33). The outer semiconducting layer (34) 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.
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Citations
38 Claims
- 1. A plant for generating active and reactive electric power for a high-voltage distribution or transmission network, comprising at least one of a gas and steam turbine coupled via a shaft means to at least one electric generator for generating a high voltage, said electric generator including at least one flexible winding comprising a conductor formed of a plurality of insulated strands and a lesser plurality of uninsulated strands, an insulation system including an inner semiconducting layer surrounding the conductor, a solid insulation surrounding the inner semiconducting layer and an outer semiconducting layer surrounding the solid insulation layer, said inner layer and said outer layer each forming an equipotential surface.
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24. A plant for generating active and reactive electric power for a high-voltage distribution or transmission network, including at least one electric generator which is coupled to at least one of a gas or-a steam turbine via a shaft means said at least one electric generator including at least one flexible winding, wherein at least one winding comprises conductor formed of a plurality of conductive insulated strands, and a lesser plurality of uninsulated strands and an insulation system including an inner layer having semiconducting properties surrounding and being in contact with the conductor, a solid insulation surrounding the inner layer and an outer layer having semiconducting properties surrounding the solid insulation, said winding being-operable in excess of 36 kV.
- 25. An electric generator arranged to be coupled to at least one of a gas and a steam turbine via a shaft means and comprising at least one flexible winding, wherein the winding comprises a conductor formed of a plurality of conductive insulated strands and a lesser plurality of uninsulated strands, a solid insulation system surrounding the conductor including an inner layer having semiconducting properties surrounding the conductor, a solid insulation surrounding the inner layer and an outer layer having semiconducting properties surrounding the solid insulation each of said inner and outer layers forming an equipotential surface, and wherein at least one of the inner and outer layers forms a monolithic structure with the solid insulation having substantially the same coefficient of thermal expansion.
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28. A plant for generating active and reactive power of high-voltage distribution including at least one rotating high voltage electric machine comprising a stator;
- a rotor and a winding, wherein said winding comprises a flexible cable including at least one current-carrying conductor including a plurality of insulated strands and at least one uninsulated strand and an insulation system surrounding the conductor, said insulation system comprising an inner layer having semiconducting properties surrounding and being in contact with the uninsulated conductor, a solid insulation surrounding the inner layer and an outer layer having semiconducting properties surrounding the solid insulation, said cable forming at least one uninterrupted turn in the corresponding winding of said machine.
- View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
Specification