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vladimir36, MANY off-shore applications use multiple gas turbine-driven synchronous generators from less than 3 MW to more than 40 MW--with no issues whatsoever. The governors of most gas turbines these days are very good at controlling speed (which is how frequency is controlled). MANY...

Controlsguy2, The original poster REALLY needs to tell if this <b>perceived</b> problem is a recent problem and how long since it was first noticed, or if it has been ongoing since commissioning--and how long ago was the plant commissioned. I don't recall if you asked about any extractions...

Andrey, The answer to your question is: What is the nominal pressure rating of the second-stage nozzle actuator, <b>OR,</b> the hydraulic system that supplies the second stage nozzle actuator? If the second nozzles are sticking ("binding") then there is either a mechanical issue with the...

vladimir, Why do you think it's necessary to allow a generator to operate at a wide range of speed in order to produce electrical power? What is it about this system you're working on that makes you think one (or more) generators need to be capable of operating at various speeds in order to...

Hello, They are pretty impressive pieces of equipment, aren't they? The prices listed below are simply recollections. There was a "price" for each turbine control system, and for each "version" of each control system, but it wasn't ever really published and varied primarily based on the...

Hi, this is pretty hard to do without being able to "draw" in control.com, and I've lost my work in two responses so far this morning. But, we shall endeavour to persevere.... You need to refer to the Signal Flow Diagrams in Appendix D of the 'Mark V Application Manual,' GEH-6195. I believe...

Alex_engineer, Thank you for the information and the details. Yes; it would seem something is amiss with the gas generator. Many aircraft derivative engines have a gearbox that controls the angle(s) of the stator vanes and the IGVs. (I'm presuming the gas generator of a PGT10 has one or...

I'm leaning towards the idea that using the shield drain wire as a third conductor is not such a good idea; twisted, shielded three-conductor cables would probably be best, especially if the cables are exposed to high-current and/or high voltage wiring/cabling in cable trays, cable trenches or...

We <i>presume</i> the unit has a Mark V, Mark VI or Mark VIe--but we're not certain. Is this alarm a Process Alarm, or a Diagnostic Alarm? I <i>presume</i> the alarm text message is GG <b>IDLE</b>FAULT_H (a spelling error either by the control system programmer on the alarm text message...

jagriti, Please read my latest post in reply to zakoota. It should start your mind's wheels turning--in synchronism. >1. During normal condition all GTs are in LCM mode (fixed >load) with say 15 MW each. Now what will happen to >generation in both cases of Grid frequency increases or...

zakoota, Quite an interesting question, and quite a bunch of considerations. The big unknown for me here is the IMS. And, how exactly does the IMS respond to an opening of the grid tie breaker? What action, specifically, does the IMS take action with respect to load under all conditions...

>Please can somebody explain to me the purpose of the vent >pipe on bearing number 2 of the GE Frame 9E Gas Turbine. The #2 bearing of a GE-design Frame 9E heavy duty gas turbine is located between the axial compressor and the turbine sections of the shaft, and as such it is internal to...

Depending on who the packager of the GE-design Frame 5 heavy duty gas turbine you are working on you can most likely find the drawings you are looking for in the Operations & Service (Maintenance) Manuals provided with the unit. If you have the combined SRV & GCV assembly (both valves in a...

jagriti, Someone wrote to tell me I should have explained the "high-high" references. Many control systems or control system providers/packagers refer to an alarm setting value as a "high" condition (when it exceeds some value in the increasing direction), or a "low" condition when the...

Sir, It's possible that leaking valves of the centrifugal compressor could result in the centrifufal compressor rotating, but without being able to see the P&ID for the centrifugal compressor and the associated piping it's impossible to say for sure. You really didn't tell us very much...

jagriti, Would it surprise you to know that most generators supplied with a unit packaged by GE don't have trips configured for the generator RTDs? Alarms, yes; but trips, no. GE's philosophy as a packager is that an alarm should alert a conscious operator to a problem--which might be or...

kuldeep, I sincerely apologize. My new cellphone (a "smarter-than-me" phone) is NOT accepting my spelling corrections and is changing them without my permission. I think I have turned off the spelling suggestions until such time as I can determine how to make it behave!! (It seems to be...

jagriti, >1. Stator coupling end : 3 nos, (DTGSF1, DTGSF2, DTGSF3)<pre> DTGSF1 Detector, Temperature-Generator Stator Forward #1 DTGSF1 Detector, Temperature-Generator Stator Forward #2 DTGSF1 Detector, Temperature-Generator Stator Forward #3</pre> There are three RTDs, embedded in...

Thanks for the update. Please keep us posted on the progress!

Hello, I would say, in my personal experience, that the situation you describe with no permissives or requirements is unusual, but with GE Belfort sequencing anything is possible. (They are extremely inconsistent. Consistently inconsistent, actually.) Actually, if the water wash system was...