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I have tried this a couple of times--writing a procedure for fuel matching. (Actually, there's usually one in Sect. 05 of the Control Specification. It's usually pretty obtuse, but there is one (a procedure) that can be used to begin to understand the intent of fuel matching.) But, writing a...

ControlsFreak, You are working on a GE-design Frame 5 heavy duty gas turbine-generator with a Mark V Speedtronic turbine control system. When did this problem start? Has this been an ongoing problem for some time, or has it just recently started? What alarms (Process and Diagnostic) are...

There are counter-emf's and back-emf's and armature reactions and all sorts of things that go on inside a synchronous generator. There are all manner of textbooks and references and YouTube videos all about this very thing; some are videos of university lectures, even. A synchronous generator...

RJSolo, First, I second David_2's commendation about the thoroughness of your post, including what was done in trying to understand the problem and what the results were. We rarely see that on Mark* questions, so, thank you. The Mark V was designed to use Geiger-Mueller UV flame detectors and...

It's so odd that so many of the GE field service personnel commissioning units during the Mark V era (and I'm presuming the units at the OPs site have Mark Vs) were infinitely more interested in changing displays in the way they thought they should be configured instead of making sure that every...

AhmedSnot, EVERY FRAME 6B IS NOT LIKE EVERY OTHER FRAME 6B!!!!!!! As the publication Curous_One shows, there are several types of DLN combustion and fuel delivery systems--you were asked about the configuration of yours early on, but you have not chosen to provide that information. I do seem...

You asked for experiences regarding Frame 6B restarts. That's what I offered--my experiences. GER-3620 is an extremely difficult document to read and understand. Why? Because they try to cover every nuance of every Frame size and do it with as few words as possible. It would have been better to...

Danger Rangers to the rescue! You have to feel a little sorry for them. They continually feel like they have to justify their salary. That's a lot of pressure to always be under. I long for the days of apprenticeships. Instead, we have Danger Rangers.

F-class machines are like beautiful women; they require a LOT of special attention and tender love and care. They were not designed for the kinds of service they frequently see (load following; cycling)--they run best at Base Load. 6B machines, on the other hand, are sturdy, robust machines...

I have seen that, also. Especially on transferred DLN (which the original poster never addressed).

At 5 MW the IGVs are likely to be less than 62 DGA. I the unit is in Primary mode, there will probably be a little swing in load. Will it trip? I don't know.

There isn't wheelspace or other parameter recommendations because as long as the unit goes on and stays on Cooldown when it gets down to zero speed, it can be restarted at any time without any restrictions. GE-design Frame 6B heavy duty gas turbines have always been robust machines, that's one...

AhmedSnot, Does your HMI have a button to disable or enable IBH? Does the unit run on natural gas fuel, and does it have a Gas Fuel Transfer Valve? Or does it have four right angle gas control valves? IBH isn't used when the IGV angles are greater than 62 DGA. So if you have a button on the...

mikegen, Of whom are you asking the question?

What does the vendor who sold you the H2C and provided the CD say? I imagine GE might have a newer version of the executable, but, it seems like you didn't buy the card and get the CD from GE. AND, we're not sure of the lineage of the HMI, either. If it's one of the new whiz-bang GE or...

Zorif, Yes; I've seen a few turbine controls in my almost 40 years in the business. It's been very satisfying, and as a GE employee for most of those years performing start-ups (commissioning) around the world I was very fortunate, and back then, they paid very well and we had top-notch...

Zorif, You have the basics covered in your P&ID--just that in my experience, axial compressor inlet temperature isn't actually used for all that much. (Having said that, newer machines with multiple stages of variable stationary axial compressor blades (vanes) might be using that parameter; I...

Zorif, I can only speak to GE heavy duty gas turbine control philosophies and practices, and I'm only going to answer with regards to conventional (diffusion flame) combustors. Axial compressor discharge pressure is used primarily in the calculation of maximum allowable exhaust temperature, in...

Yes, we're getting off topic, but we ain't hearin' nuthin' from the original poster, either.... :unsure: Things that make you go, "Hmmmmmmmm...." Anyway, these are good stories! Everyone needs a little levity once in a while, eh?

Curious_One, Glad to be of help (always)! I think we all understand that this GE turbine operation stuff can be a little intimidating and overwhelming, especially in the beginning. And, I think we all know that GE's documentation and system descriptions can be a little ... lacking, to say the...