Gas turbine temperature sensor validation apparatus and method
First Claim
1. A gas turbine system having a compressor, a combustion system for receiving fuel and pressurized air from said compressor and for generating an annular hot gas stream, a turbine driven by the hot gas stream and operative to drive said compressor, an exhaust duct for exhausting said hot gas stream, means for controlling the operation of the gas turbine in response to various parameters of gas turbine operation including the temperature of the hot gas stream as sensed by a plurality of temperature sensors, said temperature sensors disposed in an annular array in said exhaust duct with the spacing between adjacent temperature sensors being generally equal and selected such that a temperature streak caused by a combustion system malfunction would affect at least two adjacent temperature sensors, and means for determining the validity of each temperature sensor reading prior to use by said controlling means, said validity determining means being operative to examine the temperature readings of temperature sensors that are adjacent to a particular temperature sensor having a reading which is outside of first predetermined bounds and for rejecting the reading from said particular temperature sensor when each said adjacent temperature sensor is within second predetermined bounds.
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Abstract
An arrangement for determining the validity of temperature sensor readings of a gas turbine hot gas stream which includes means for comparing each reading to predetermined bounds. The temperature sensors are arranged so that a temperature streak caused by a combustion system malfunction would affect more than one sensor. In some cases, when a suspect reading is identified, the readings from adjacent sensors are examined before the suspect reading is rejected.
159 Citations
1 Claim
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1. A gas turbine system having a compressor, a combustion system for receiving fuel and pressurized air from said compressor and for generating an annular hot gas stream, a turbine driven by the hot gas stream and operative to drive said compressor, an exhaust duct for exhausting said hot gas stream, means for controlling the operation of the gas turbine in response to various parameters of gas turbine operation including the temperature of the hot gas stream as sensed by a plurality of temperature sensors, said temperature sensors disposed in an annular array in said exhaust duct with the spacing between adjacent temperature sensors being generally equal and selected such that a temperature streak caused by a combustion system malfunction would affect at least two adjacent temperature sensors, and means for determining the validity of each temperature sensor reading prior to use by said controlling means, said validity determining means being operative to examine the temperature readings of temperature sensors that are adjacent to a particular temperature sensor having a reading which is outside of first predetermined bounds and for rejecting the reading from said particular temperature sensor when each said adjacent temperature sensor is within second predetermined bounds.
Specification
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Current AssigneeGeneral Electric Company
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Original AssigneeGeneral Electric Company
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InventorsJohnson, Daniel, Macier, Robert Raymond, Gilbert, Kendall E.
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Primary Examiner(s)Gordon, Clarence R.
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Application NumberUS05/638,852Time in Patent Office715 DaysField of Search60/39.03, 60/39.28 T, 60/39.28 R, 235/151.3, 235/151.32, 235/150.2, 73/1 F, 73/116US Class Current60/39.281CPC Class CodesG01K 15/00 Testing or calibrating of t...
