Adjustable speed gas turbine power generation apparatus and its operation method independent of ambient temperature
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United States of America Patent
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Oct 7, 1997
Grant Date -
N/A
app pub date -
Jun 21, 1994
filing date -
Jul 23, 1993
priority date (Note) -
Expired
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Abstract
An adjustable speed gas turbine power generation apparatus can maintain a rated output of the gas turbine generation apparatus irrespective of ambient temperature change. For this purpose, the rotational speed of the secondary winding of the generator is controlled by the gas turbine and alternating current excitation of the secondary winding is determined on the basis of the ambient temperature. The sucked air quantity (flow rate by weight) in the compressor can be increased by increasing the rotational speed of the gas turbine when the ambient temperature increases, so that an output from the gas turbine becomes nearly the rated output, while maintaining the desired frequency at the primary winding.
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