METHOD FOR OPERATING A GAS TURBINE
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United States of America Patent
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Issued Date -
Sep 15, 2016
app pub date -
Mar 9, 2016
filing date -
Mar 9, 2016
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Abstract
A gas turbine having a compressor is controlled at least by controlling an opening of variable inlet guide vanes between a maximum opening and a minimum opening. A function indicative of the mechanical stress undergone by compressor blades downstream of the variable inlet guide vanes has an increasing line trend from the maximum opening to the minimum opening of the variable inlet guide vanes. The function has operating windows in which the function is smaller than a stress limit and at least one intermediate window between two operating windows, in the intermediate window the function being greater than the stress limit. The variable inlet guide vanes are regulated with a given velocity when moving from one operating window to another operating window passing through an intermediate window.
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