초록 ▼

A control system including a controller for reading temperature values from sensors in a gas turbine, determining the reliability of the sensors, and issuing a fuel control signal for use in controlling the turbine is disclosed. The fuel control signal has a calculated value which is a function of t

A control system including a controller for reading temperature values from sensors in a gas turbine, determining the reliability of the sensors, and issuing a fuel control signal for use in controlling the turbine is disclosed. The fuel control signal has a calculated value which is a function of the turbine operating temperature derived from the values of temperature signals generated by the sensors.

대표청구항 ▼

A system for controlling fuel flow to a gas turbine in accordance with turbine temperature represented by the values of temperature readings provided by temperature sensors in the turbine, said system comprising: (a) a programmable controller for providing a temperature trim signal including, (1) a

A system for controlling fuel flow to a gas turbine in accordance with turbine temperature represented by the values of temperature readings provided by temperature sensors in the turbine, said system comprising: (a) a programmable controller for providing a temperature trim signal including, (1) a storage means for retaining a program of instructions and holding data related to the calculation of said temperature trim signal, (i) certain ones of said instructions directing said controller to determine if the value of each temperature reading is within prescribed limits and to reject those readings which are out of limits, (ii) certain other ones of said instructions directing said controller to calculate the value of said temperature trim signal for output by said controller only when a specified number of unrejected temperature readings are within said prescribed limits, said temperature trim signal, when present, having a value proportional to the difference between a mid-value signal applied to said controller and a calculated value proportional to the average of unrejected temperature readings, and (2) means in communication with said storage means for executing said instructions and processing said data; (b) a signal source for generating a reference signal proportional to a safe turbine operating temperature; and, (c) analog control means for providing a fuel control signal including, (1) means coupled to specified ones of said temperature sensors for providing said mid-value signal to said controller, said mid-value signal having a magnitude intermediate the individual values of the temperature readings provided by said specified ones, and (2) combining means for providing said fuel control signal, said combining means responsive to said temperature trim signal, said mid-value signal and said reference signal to provide said fuel control signal when said temperature trim signal is present at the output of said controller, and further responsive to said mid-value signal and said reference signal to provide said fuel control signal in the absence of said temperature trim signal; (d) means for transferring the temperature readings to said controller from said temperature sensors; and (e) means for delivering said fuel control signal from said analog means to said gas turbine for controlling fuel flow thereto.