Overspeed control system for gas turbine electric powerplant
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United States of America Patent
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May 17, 2005
Grant Date -
N/A
app pub date -
Apr 16, 2002
filing date -
Apr 16, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A turbine overspeed control system for a gas turbine electrical powerplant. The powerplant may employ an aeroderivative gas turbine engine for producing electrical power. The overspeed control system preferably comprises a compression relief system and an air directing system. When an overspeed condition of the gas turbine engine is detected, the compression relief system acts to remove air from a combustion section of the engine. Preferably, the air is removed to the atmosphere. The air directing system operates to ensure that air entering a compressor section of the gas turbine engine does not impinge on the blades of a compressor turbine located therein at the optimum angle. The result of operating the compression relief and air directing systems is a reduced combustor efficiency. Consequently, a reduced amount of hot gases are available to drive the turbines of the gas turbine engine, and the rotational speed thereof decreases.
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