T
Good Morning All,
I work for a CCGT operator in Europe, we have recently had GE undertake a DLN tuning procedure in line with some recent changes to control hardware.
We have GE 9FA+e with DLN 2.6+ combustion system
From the tuning report we have GE have highlighted that Peak 1 dynamics were a little high, in the order of 2-2.5 psi and 3 psi at certain load values (current ambient average approx 6 deg C). In order to bring those values back in line they have altered certain control constants - this is where my knowledge falls down. I have the constants they altered but would like to translate into some real meaning (i.e. english - bleed valve positions etc etc).
I previously worked for an OEM myself and would occasionally look at combustion dynamics issues but the combustors, whilst of the Dry low emissions configuration, were vastly different from these. For a start these are multi-fuel injectors and those previously worked on were single fuel injectors. As such I'm conscious that they may have different drivers/root cause.
So my questions is firstly, what are the following constants, or at least what do they relate to (i.e. bleed valves, firing temperature settings, fuel splits, etc, etc)
- FXKSG2_M_'x' ('x' being 0-4)
- TG2_SS_'y' ('y' being 0-5)
- PG2_SS_'z' ('z' being 0-5)
Secondly, is there anybody out there that has any experience on these combustor types that can tell me what mechanism is likely to drive peak 1 dynamics on these units. I appreciate what I'm asking here given that I have some experience in the area but I'm trying to narrow my search in some way, even just to be left with many other options. I can analyse the rest from there.
Thanks
TurboPower
I work for a CCGT operator in Europe, we have recently had GE undertake a DLN tuning procedure in line with some recent changes to control hardware.
We have GE 9FA+e with DLN 2.6+ combustion system
From the tuning report we have GE have highlighted that Peak 1 dynamics were a little high, in the order of 2-2.5 psi and 3 psi at certain load values (current ambient average approx 6 deg C). In order to bring those values back in line they have altered certain control constants - this is where my knowledge falls down. I have the constants they altered but would like to translate into some real meaning (i.e. english - bleed valve positions etc etc).
I previously worked for an OEM myself and would occasionally look at combustion dynamics issues but the combustors, whilst of the Dry low emissions configuration, were vastly different from these. For a start these are multi-fuel injectors and those previously worked on were single fuel injectors. As such I'm conscious that they may have different drivers/root cause.
So my questions is firstly, what are the following constants, or at least what do they relate to (i.e. bleed valves, firing temperature settings, fuel splits, etc, etc)
- FXKSG2_M_'x' ('x' being 0-4)
- TG2_SS_'y' ('y' being 0-5)
- PG2_SS_'z' ('z' being 0-5)
Secondly, is there anybody out there that has any experience on these combustor types that can tell me what mechanism is likely to drive peak 1 dynamics on these units. I appreciate what I'm asking here given that I have some experience in the area but I'm trying to narrow my search in some way, even just to be left with many other options. I can analyse the rest from there.
Thanks
TurboPower