Combustion temperature high speed detection device
View Patent ↗A combustion temperature high speed detection device is provided with a phase lead processing portion, thereby canceling out a detection lag of a temperature detector, and detecting the combustion gas temperature of a combustor at a high speed. The combustion temperature high speed detection device is also provided with a first-order lag filtering portion with a time constant of 0.25 second, a phase lag processing portion with a time constant of 10 seconds, a temperature change filtering portion with a cutoff frequency of 2 to 3 Hz, and a disturbance filtering portion including first-order lag filtering portions with different time constants and a high value selecting portion. Thus, high speed detection of the combustion gas temperature more suitable for a gas turbine system can be performed.
1. A combustion temperature high speed detection device for detecting a combustion gas temperature of a combustor, provided in a gas turbine system, based on a temperature detection signal of a temperature detector installed in said gas turbine system, comprising:
high speed detection means for predicting said combustion gas temperature by processing said temperature detection signal in accordance with temperature detection lag characteristics of said temperature detector; and
disturbance filtering means including:
first first-order lag filtering means with a short time constant;
second first-order lag filtering means with a long time constant; and high value selecting means for selecting the higher of output values of said first and second first-order lag filtering means;
wherein said high speed detection means is phase lead processing means.
2. The combustion temperature high speed detection device according to claim 1 , further comprising phase lag processing means for relaxing a stepwise change in said temperature detection signal.
3. The combustion temperature high speed detection device according to claim 1 , further comprising first-order lag filtering means for removing a high frequency electrical disturbance, which has slipped into said temperature detection signal, from said temperature detection signal.
4. The combustion temperature high speed detection device according to claim 1 , further comprising temperature change filtering means for filtering out a high frequency component of said temperature detection signal.