Protection process and control system for a gas turbine
First Claim
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1. A process for protection of a gas turbine from damage caused by pressure pulsations, the process comprising:
- measuring pressure pulsations occurring during the operation of the gas turbine;
generating a pulsation-time signalvfrom the measured pressure pulsations;
transforming the pulsation-time signal into a pulsation-frequency signal;
determining from the pulsation-frequency signal a pulsation level for at least one specified monitoring frequency band;
monitoring the pulsation level for the occurrence of at least one trigger condition; and
, carrying out, when the at least one trigger condition occurs, a protective action.
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Abstract
In a process for protection of a gas turbine (1) from damage caused by pressure pulsations (P),
- pressure pulsations (P) occurring during the operation of the gas turbine (1) are measured, from the measured pressure pulsations (P), a pulsation-time signal (PZS) is generated, the pulsation-time signal (PZS) is transformed into a pulsation-frequency signal (PFS),
- from the pulsation-frequency signal (PFS), a pulsation level (PL) is determined for at least one specified monitoring frequency band (12), the pulsation level (PL) is monitored for the occurrence of at least one specified trigger condition, and,
- when the at least one trigger condition occurs, a specified protective action (16) is carried out.
28 Citations
18 Claims
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1. A process for protection of a gas turbine from damage caused by pressure pulsations, the process comprising:
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measuring pressure pulsations occurring during the operation of the gas turbine;
generating a pulsation-time signalvfrom the measured pressure pulsations;
transforming the pulsation-time signal into a pulsation-frequency signal;
determining from the pulsation-frequency signal a pulsation level for at least one specified monitoring frequency band;
monitoring the pulsation level for the occurrence of at least one trigger condition; and
,carrying out, when the at least one trigger condition occurs, a protective action. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 18)
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14. A control system for a gas turbine comprising:
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a pulsation measuring device which includes and is configured and arranged to measure with a sensor means the pressure pulsations occurring during the operation of the gas turbine and generates a pulsation-time signal (PZS) correlated with said pressure oscillations;
a pulsation evaluation device configured and arranged to transform the pulsation-time signal (PZS) into a pulsation-frequency signal (PFS), determine from the pulsation-frequency signal (PFS) for at least one specified monitoring frequency band a pulsation level (PL), monitor the pulsation-frequency signal for the occurrence of at least one specified trigger condition, and when the at least one trigger condition occurs, generate a trigger signal; and
a control device configured and arranged to perform a specified protective action when the trigger signal is present. - View Dependent Claims (15, 16, 17)
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Specification