Method and measurement device for determining a condition of an electric igniter of a gas turbine burner and an ignition device for a gas turbine burner
AssigneeSiemens Aktiengesellschaft
InventorJörg Gonder
Life of this patent
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Abstract
A method for determining a condition of an electric igniter of a gas turbine burner and a measurement device for a gas turbine burner are provided. By means of the method and the measurement device it is possible to prevent false starts of gas turbines as a result of a nonfunctional igniter. The method provides for a time-dependent signal characterizing the ignition current of an igniter to be compared to an upper threshold value and a lower threshold value and at the same time to compare the characterizing signal to a mean target current value, by which the ignition current should fluctuate randomly when the igniter is functioning properly.
Claims15
A method for determining a state of an electric igniter of a gas turbine burner, comprising:
- comparing a time-dependent signal, which characterizes an ignition current of the electric igniter, with an upper limit value and a lower limit value;
- and
- comparing the characterizing time-dependent signal with a set-point current mean value,
- wherein the characterizing time-dependent signal describes a magnitude of the ignition current, and
- wherein in each case the upper limit value and the lower limit value are time-dependent, forming a set-point current envelope curve, and
- wherein the set-point current mean value is time-dependent, forming a set-point current trend characteristic.
A measuring device for determining a state of an electric igniter of a gas turbine burner, comprising:
- a sensor for time-resolved measurement of a current signal of the electric igniter;
- and
- an evaluation device which is connected to the sensor, comprising:
- a memory,
- a means for comparing the current signal which is made available by the sensor, and
- a limit value which is stored in the memory,
- wherein three values, a first value, a second value, and a third value are stored in the evaluation device and differ in magnitude,
- wherein three means are provided for comparing the current signal with one of the three values in each case,
- wherein two of the three values, the first value and the second value, are time-dependent limiting values and form an envelope curve,
- wherein two of the three means are formed as limit-value comparators,
- wherein the third value is formed as a time-dependent set-point current trend characteristic, and
- wherein one of the three means is formed as a comparator which monitors the current signal for a flow which fluctuates around the set-point current trend characteristic.
A method for determining a state of an electric igniter of a gas turbine burner, comprising:
- comparing a time-dependent signal, which characterizes an ignition current of the electric igniter, with an upper limit value and a lower limit value;
- and
- comparing the characterizing time-dependent signal with a set-point current mean value,
- wherein the characterizing time-dependent signal describes a magnitude of the ignition current, and
- wherein in each case the upper limit value and the lower limit value are time-dependent, forming a set-point current envelope curve or the set-point current mean value is time-dependent, forming a set-point current trend characteristic.
Dependencies are inferred from the claim text.