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Every GE-design heavy duty gas turbine is provided with a document called the Control Specification. That document, in Section 5, should have a paragraph for each fuel titled 'Expected Fuel Characteristics' or something similar. That section should have a table which lists expected fuel flow...

Hey, Phil, Why don't you post your 'The Physics of....Armature Reaction!' white paper to the controlwiki? Along with your 'Physics of... Electrical Power!' description. Thanks!

MZI, This is pretty strange, because the Mark V servo-valve regulator is supposed to be a high-select of the two inputs. If one input is lower than the other then the lower value should be "ignored". This means that if one of the LVDTs is reading 3.15 VRMS and the other is reading 2.98 VRMS...

RY, This thread was started because of a possible problem with Atomizing Air pressure/flow from the Booster Atomizing Air Compressor during starting on liquid fuel. The data for this unit seems to indicate that the LFBV was controlling liquid fuel flow-rate during firing properly without...

>The sync protection will not allow a >sync without complete sequence. Do you >concur? As was said previously, I believe a failure to achieve Complete Sequence will not allow a typically configured Auto synch to be selected or enabled. Thus, it will effectively prevent an Auto synch.

bkm, Depending on how the LVDTs were calibrated and the gap between the valve stems and the actuator rods the negative feedback could be less than -3%, and, even less than -5%--even if the LVDTs were properly calibrated! So, that would mean that in order to prevent erroneous alarms and...

> Incomplete sequence? This is a good possibility, though it would not typically even allow Auto Synch to be selected or enabled if the unit hadn't reached Complete Sequence. And, that would usually be indicated by one of the "lights" at the left of the Synch Display. If the originator...

MZI, I have re-read all of the copied-and-pasted operations log entries and have seen that you have listed some Diagnostic Alarms. But there's a lot of information that's not clear and not provided. Such as individual servo currents during the IGV position problems; individual LVDT feedbacks...

You didn't provide the alarms (Process and Diagnostic) which were existing just prior to the hunting and which alarms (Process and Diagnostic) were annunciated during the hunting event. From the information provided in your message, it would seem you need to review the sequencing or...

Actually, I just realized that B K Meena was the originator of the second thread. And, we're <b>STILL</b> having this same discussion. About the <b>SAME</b> condition. Give me strength!

The 'Not Following Reference' alarm is NOT related to the -3.5% indication that comes when the GCV (or SRV, for that matter) is "closed". That alarm should be able to be reset with a Master Reset at this time. This topic has been covered many times on control.com. A <b>properly calibrated</b>...

Okay; I've found one post with that indication. I was expecting to see the icons "animated" with green or yellow to indicate quickly if a post was helpful or not. I would agree the feature isn't being widely used. It's unfortunate because it is another tool which readers of archived threads...

MZI, It's really wonderful that you can copy-and-paste from your operations logs, but <b>you haven't provided the requested information.</b> No Process- or Diagnostic Alarms, and no results of any of the "tests" (that word is used very loosely in this context as the "work" performed seems...

That is a good point about the isolation valve being closed during Off-Line Water Washing (or On-line Water Washing, for that matter). Another thing to mention is that many times axial compressor discharge air is fairly "damp" due to ambient conditions or the use of evaporative cooling of the...

>Is there any ready made scheme >available...?? >if yes plz help. None that I'm aware of. Each scheme was engineered for the desired parameters.

From the very little information provided, it's presumed the unit is running on gas fuel at the moment, because there isn't likely sufficient atomizing air pressure available to run on liquid fuel. (You forgot to tell us what fuel the unit is running on.) When the unit is running on gas fuel...

This is, or used to be, done fairly frequently. HOWEVER, you need to realize that any air you take from the axial compressor discharge will mean that much less air for combustion and cooling and dilution. Meaning that the performance of the unit will decrease as the air flow decreases. You...

If you have a typical Mark VI installation, then your HMI has a Synch Display. On that display, along the left side of the display, are several "lights" (for lack of a better term). They all have to be green in order for Automatic Synchronization to occur. Any one light that does not turn green...

I primarily use Firefox as my preferred browser, but for the purposes of testing in preparation for this question I've used others. How do we know which posts users find helpful or not? I can only see the ones I have identified as useful or not helpful. Is there some browser setting which...

Dudiw, I know for certain that GE provides simulations, but I also know for certain they are not free. I don't know of anyone who provides simulations for free. I have heard that some Yokogawa DCS control system integrators have been providing turbine control simulations. I would...