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Old   July 23, 2010, 01:59
Default Gas turbine load problem
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Hashim
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I am working in combined cycle power plant and recently i have faced a problem that is
we have 2 gas turbines and 1 steam turbine. Few days ago a dust strom and after that rain came and just after our one gas turbine load reduced approximatley 2 MW.

Reduced load turbine parameter are,
pressure drop just before and after filters= 70.3mmH20
compressor Inlet temperature= 28 C
Compressor discharge pressure= 13 barg
compressor discharge pressure= 408 C

If any body know the cause please comment. waiting for response.
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Old   July 23, 2010, 09:14
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Robert
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What machine?

Have you calculated the compressor efficiency before and after the storm? Is the compressor dirty?

Did the pressure loss across the filters go up?

Do you have a compressor water wash? Offline or on/offline?
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Old   July 24, 2010, 04:48
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Hashim
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GE mark VI speedtronic control machine
yes i have calculated compressor efficiency and i was just below to previous. no i is not dirty
yes the DP acorss filter is reduced
yes we have offline washing system.
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