Method for starting up a system for generating electrical power
First Claim
1. A method for operating a system for generating electrical power, the system including a turbine that is mechanically connected to a generator, the generator being electrically connected via a converter to a an electrical power supply grid, and the generator including a total number of windings, the method comprising:
- operating the generator as a generator at operating speed of the turbine for generating electrical power; and
operating the generator as a motor at low rotational speed of the turbine for starting up the turbine, in so doing combining a number of the generator windings, wherein the number of combined generator windings is lower than the total number of windings of the generator, and wherein with an increasing rotational speed of the turbine, the magnetic flux of the generator is first kept constant and is then reduced.
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Abstract
Described is a method for starting up a system for generating electrical power. The system includes a turbine that is mechanically connected to a generator, while the generator is electrically connected via a converter to a load, in particular to a power supply grid. The generator includes a total number of windings. With at least one embodiment of the method, a number of generator windings are combined at low rotational speeds of the turbine, wherein the combined number of windings is less than the total number of windings.
13 Citations
20 Claims
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1. A method for operating a system for generating electrical power, the system including a turbine that is mechanically connected to a generator, the generator being electrically connected via a converter to a an electrical power supply grid, and the generator including a total number of windings, the method comprising:
- operating the generator as a generator at operating speed of the turbine for generating electrical power; and
operating the generator as a motor at low rotational speed of the turbine for starting up the turbine, in so doing combining a number of the generator windings, wherein the number of combined generator windings is lower than the total number of windings of the generator, and wherein with an increasing rotational speed of the turbine, the magnetic flux of the generator is first kept constant and is then reduced. - View Dependent Claims (2, 3, 4, 5, 6, 7, 13, 14, 15, 16, 17)
- operating the generator as a generator at operating speed of the turbine for generating electrical power; and
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8. A method for operating a system for generating electrical power, the system including a turbine that is mechanically connected to a generator, the generator being electrically connected via a converter to a an electrical power supply grid, and the generator including a total number of windings, the method comprising:
- operating the generator as a generator at operating speed of the turbine for generating electrical power; and
operating the generator as a motor at low rotational speed of the turbine for starting up the turbine, in so doing combining a number of the generator windings, wherein the number of combined generator windings is lower than the total number of windings of the generator, and, wherein for the start-up of the system, the converter is commutated at higher rotational speeds of the turbine in dependence on the generator.
- operating the generator as a generator at operating speed of the turbine for generating electrical power; and
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9. A system for generating electrical power, comprising:
- a turbine, mechanically connected to a generator, the generator being electrically connected via a converter to an electrical power supply grid, the generator including a total number of windings, wherein the generator operates as a generator at operating speed of the turbine for generating electrical power, and the generator also operates as a motor at low rotational speed of the turbine for starting up the turbine, in so doing combining a number of the generator windings, and, wherein the combined number of generator windings is lower than the total number of windings of the generator, and, wherein with an increasing rotational speed of the turbine, the magnetic flux of the generator is first kept constant and is then reduced.
- View Dependent Claims (10, 11, 12, 18, 19)
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20. A system for generating electrical power, comprising:
- a turbine, mechanically connected to a generator, the generator being electrically connected via a converter to an electrical power supply grid, the generator including a total number of windings, wherein the generator operates as a generator at operating speed of the turbine for generating electrical power, and the generator also operates as a motor at low rotational speed of the turbine for starting up the turbine, in so doing combining a number of the generator windings, and, wherein the combined number of generator windings is lower than the total number of windings of the generator, and, wherein for the start-up of the system, the converter is commutated at higher rotational speeds of the turbine in dependence on the generator.
Specification