Patent ID: 6782691
Filing Date: 2004-08-31
Classification: F01D,F02C,F05D

Abstract:
A gas turbine plant comprising:a combustion section configured to combust fuel and air to generate combustion gas; a turbine section configured to be driven by the combustion gas from the combustion section; an exhaust section connected to the turbine section and configured to exhaust the combustion gas from the turbine section; a plurality of temperature detecting units provided in the exhaust section configured to measure a plurality of temperatures of the combustion gas; and a monitoring unit configured to generate a warning signal based on a comparison of a predetermined level and a temporal change of data corresponding to at least one of the plurality of temperatures, the monitoring unit comprising: an averaging circuit configured to calculate an average temperature of the plurality of temperatures; and a plurality of temperature change determining sections, wherein said temperature change determining sections comprise: a first difference calculating unit configured to calculate a temperature difference between said average temperature and the at least one of the plurality of temperatures; a delay unit configured to delay said temperature difference by a predetermined time period to provide a delayed temperature difference; and a second difference calculating unit configured to calculate a calculated difference between said delayed temperature difference and said temperature difference and to output the calculated difference as said temporal change of data corresponding to the at least one of the plurality of temperatures.