Method and apparatus for starting a gas turbine using a polyphase electric power generator
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United States of America Patent
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Nov 1, 2005
Grant Date -
Jun 2, 2005
app pub date -
Nov 28, 2003
filing date -
Nov 28, 2003
priority date (Note) -
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Abstract
A method to start a combined unit gas turbine and electrical unit having a static start drive including the steps of: applying a variable frequency voltage from the static start drive to a winding of the generator to accelerate the combined unit to a turbine self-sustaining speed; accelerating the combined unit beyond the self-sustaining speed by applying torque generated by the turbine, and as the combined unit accelerates to a synchronous speed, applying a braking torque from the static start drive to steady the combined unit at the synchronous speed.
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