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Shaheed, No; I don't mean that at all. I mean that most every turbine governor has some kind of "sense" of rated power output, either a hard-programmed limit in watts, kW, or MW, or in steam flow, or in some cases control valve position in conjunction with steam temperature and/or...

glenmorangie, I'm presuming you're speaking about off-base enclosures (such as are used for DLN combustor-equipped units). Probably a cost-saving measure to prevent the need to make a penetration through the turbine compartment enclosure wall for the spark plug/ignitor leads--and also...

This is getting kind of scary.... What glenmorangie is saying is that load is proportional to fuel flow-rate. Increase the fuel flow-rate, and the load increases. Decrease the fuel flow-rate and the load decreases. P3 is Gas Control Valve discharge pressure--the pressure of the gas in the...

They should all be mounted outside of the turbine compartment--even the new high-energy ignitors used on DLN combustor-equipped machines (though I'm hearing that GE-Belfort, yet again, is changing things up and using the old retractable spark plugs in DLN combustor-equipped units). This is...

TBONE, Aye, mate! That be the same thing. Can you add to the discussion of operation and basic principles? We need some assistance. Thanks!

Phil Corso, I'm certain there is interest. Perhaps it's just the way the information is being offered? You seem like a very knowledgeable person, but the way you dole out your knowledge can be a little off-putting. What's the matter with trying to remember how you first learned the...

KevinK, Realizing it's the holiday season in many parts of the world, has there been an opportunity to try switching the stand-by gen-set to Droop mode when synchronized to the grid to see if that has had any effect on improving operations? Even if there hasn't been an opportunity, can you...

Vijay, There hasn't been much discussion around Solar gas turbines here on control.com, so that's probably why you haven't had a response. I'm hesitant to hazard a guess without knowing more about the logic/sequencing/programming in the control system. Wish I could have been more help!

Shaheed, You're correct about the function of Isoch and Droop modes. Base Load cannot be selected when Isoch mode is selected, as the turbine needs to respond (very quickly) to changes in load/frequency and can't do that if it's producing maximum power. Base Load for a steam turbine is...

Dear, The topic of exhaust temperature spreads has almost as many threads as that of droop speed control (it's certainly the second-most gas turbine-related thread). Gas fuel flows out of one set of orifices in the fuel nozzles, and liquid fuel flows out of another, different, set of...

SPG, I suppose under a very limited set of circumstances a bad exciter could contribute to a reverse power trip--but only if the real power (watts) was at or slightly less than zero to begin with. Reverse power is related to the inability of the generator prime mover to keep the generator...

glenmorangie, I almost like troubleshooting grounds--under decent circumstances, of course. Troubleshooting grounds isn't difficult--once one understands what can and can't be grounded. The two most difficult grounds I've ever troubleshot were grounds that were not on devices connected to the...

DAMENE, It's very difficult, but, if you will try to "split" the HMI from the Mark VI you will probably have more luck with troubleshooting this problem. Because, for my part, it doesn't seem like the problem is the Mark VI--but the HMI. Or, rather, CIMPLICITY or TCI. I'll wager if you try...

otised, Thanks very much for the information. I've worked on a couple of Mark II-equipped units, replaced many with Mark V, Mark VI and Mark VIe. But, I've never worked on a Mark I unit, though I have reviewed some old Mark I elementaries. One of the things that's so good about GE-heavy...

bobbyw, If the diesel decelerates and goes into cooldown, then it wouldn't seem to be the diesel L.O. pressure switch. But, if the jaw clutch closes and then during acceleration something causes the jaw clutch limit switch (33CS-1) to change state that would tell the diesel to decelerate...

Shyam, > We checked the floating voltage on the battery charger panel side found > 110 V on positive (+ - 0) side and 15V on negative side (- - 0). What you describe is referred to as a "soft" ground because neither battery leg is fully grounded (which would be indicated by a reading of...

RRA, > Quick question: should I adjust the FSKRN1 constant to make it match the actual FSNL? > How frequent we should do this (or maybe we should not)? Actually, unless you are having trouble synchronizing or you know the gas fuel make-up is significantly different from expected I don't...

suchitra, For a single-flow steam turbine, yes, there is a relationship between axial position and main steam pressure. You can change the operating mode and see what effect is has on the turbine at your site, but the best person to ask this question of is the OEM who may have a graph or...

There should be a minimum of seven (7) replies before we're treated to Part 2. And, there's been a new term introduced to the discussion that hasn't been defined: voltage-alignment. Perhaps a simple explanation of this term may help move some people off the dime, so to speak.

Karim, My main reason for asking how inlet filter cleanliness was related to control systems was that this is a controls-related forum. Several of my colleagues--and some other contributors to control.com--have asked my why we spend so much time on GE-design heavy duty gas turbine machine...