Electric power generation system using a permanent magnet dynamoelectric machine for starting a combustion turbine and for generating uninterruptible excitation power
First Claim
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1. An electric power generation system comprising:
- a combustion turbine;
a generator connected to the combustion turbine along a common shaft;
an exciter device connected to the generator;
a dynamoelectric machine connected to the combustion turbine and the generator along the common shaft; and
a drive electrically coupled to the dynamoelectric machine, said drive being configured to generate a variable frequency signal for causing motoring action in said dynamoelectric machine, wherein said dynamoelectric machine operates as a starter for starting the combustion turbine from an initial condition to a desired rotational speed, upon said combustion turbine reaching an operating condition, said dynamoelectric machine being responsive to mechanical energy from the combustion turbine passed by the common shaft, said mechanical energy causing an electrical generating action in said dynamoelectric machine, wherein said dynamoelectric machine operates as a power source for providing a supply of electrical power to said exciter device, said supply of electrical power being independent of an electrical power grid.
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Abstract
An electric power generation system 10 with a combustion turbine 12 as a prime mover for a main generator 16 is provided. The power generation system includes a dynamoelectric machine 30 that may be used both as the starting motor and as a generator to provide a source of excitation power that is essentially independent of a local power system and thereby not susceptible to voltage fluctuations and/or power interruptions.
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Citations
12 Claims
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1. An electric power generation system comprising:
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a combustion turbine;
a generator connected to the combustion turbine along a common shaft;
an exciter device connected to the generator;
a dynamoelectric machine connected to the combustion turbine and the generator along the common shaft; and
a drive electrically coupled to the dynamoelectric machine, said drive being configured to generate a variable frequency signal for causing motoring action in said dynamoelectric machine, wherein said dynamoelectric machine operates as a starter for starting the combustion turbine from an initial condition to a desired rotational speed, upon said combustion turbine reaching an operating condition, said dynamoelectric machine being responsive to mechanical energy from the combustion turbine passed by the common shaft, said mechanical energy causing an electrical generating action in said dynamoelectric machine, wherein said dynamoelectric machine operates as a power source for providing a supply of electrical power to said exciter device, said supply of electrical power being independent of an electrical power grid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for starting and operating an electric power generation system comprising a combustion turbine connected to a generator along a common shaft and further comprising a brushless exciter device connected to the generator, said method comprising:
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connecting a permanent magnet dynamoelectric machine to the combustion turbine and the generator along the common shaft;
operating said dynamoelectric machine as a starter for starting the combustion turbine from an initial condition to a desired rotational speed;
upon said combustion turbine reaching an operating condition, operating said dynamoelectric machine as a power source for providing a supply of electrical power to said brushless exciter device, said supply of electrical power being independent of an electrical power grid. - View Dependent Claims (10)
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11. A method for starting and operating an electric power generation system comprising a combustion turbine connected to a generator along a common shaft, said method comprising:
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connecting a permanent magnet dynamoelectric machine to the combustion turbine and the generator along the common shaft;
operating said dynamoelectric machine as a starter for starting the combustion turbine from an initial condition to a desired rotational speed;
upon said combustion turbine reaching an operating condition, operating said dynamoelectric machine as a power source for providing a supply of excitation power to said generator, said supply of electrical power being independent of an electrical power grid. - View Dependent Claims (12)
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Specification