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In our power plant, GE gas turbines 9FA are liquid fuel operated. For all units, the water injection is in service @ 150 MW but only one unit the water injection is in service @ 75 - 80 MW. That difference happened after the performance test for thos unit. We compared between the operating parameters @ 150 MW and 75 MW for this unit and another unit. TTXM, IGV position, IBH, SRF1, water injection demand all this parameters are constant for the same operating conditions and loads. Both of water injection combustion reference constant and fuel flow sufficient constant are the same. No alarms announced during water injection enabling.
Any ideas about this situation?
Any ideas about this situation?