We're operating a GE Frame 9e DLN turbine,
We recently changed the IGV LVDT and the IGV was working fine giving good feedback after calibration.
The challenge observed was during startup, unit ramps up till immediately after firing, it's observed that the SRV only opens at 6% maximum then goes down to 2% then loss flame and trips.
We calibrated the SRV severally and it opens fully during calibration without drag or hesitation. But when we try to start up it drags between 2, 3,4,5,6%, then trips. What could be the problem?
We recently changed the IGV LVDT and the IGV was working fine giving good feedback after calibration.
The challenge observed was during startup, unit ramps up till immediately after firing, it's observed that the SRV only opens at 6% maximum then goes down to 2% then loss flame and trips.
We calibrated the SRV severally and it opens fully during calibration without drag or hesitation. But when we try to start up it drags between 2, 3,4,5,6%, then trips. What could be the problem?