Turbine set with a generator feeding a network of constant frequency
AssigneeSiemens Aktiengesellschaft
InventorFranz Spirk
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Abstract
In a turbine set with an axial flow which is traversed by water and which is coupled to a generator feeding a network of constant frequency, the flow turbine is a propeller turbine with non-adjustable blades. The stator winding of the generator is connected to the network by means of a frequency-controllable converter, in particular a direct converter. The speed of rotation of the turbine set is controllable continuously according to the power to be delivered. In the case of an asynchronous design of the generator, it is advisable to provide the stator with a waterproof jacket on the inside and to flange it into the turbine tube, since the rotor with its cage winding is swept by water.
Claims11
In a turbine set for supplying electric power to a distribution network operating at a fixed network frequency of 50 or 60 Hz comprising:
- a turbine traversed by water and comprising a shaft and fixed blades;
- a generator having a rotor and a stator with windings, said rotor coupled to said shaft;
- and
- a frequency-controllable converter coupling the generator stator winding to the network, the improvement comprising:
- (a) said generator adapted to operate at a frequency of less than 20 Hz;
- (b) said frequency-controllable converter being a direct converter;
- and
- (c) the speed of rotation of the turbine being continuously controllable to obtain optimum efficiency at the power being delivered.
The invention according to claim 8 in which the watertight jacket of the stator consists of glass fiber-reinforced plastic.
Dependencies are inferred from the claim text.