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George, I don't understand what you're trying to describe at all; sorry. One company might be in charge of procuring and supplying all the equipment required for a power plant, but "...directly constructing..." all of the equipment? That would seem to be very expensive, especially if they are...

Martin, Thanks for clarifying if this has been an ongoing issue for some (since commissioning???) or a more recent issue. I presume all the engines are the same, and the governors are the same, as well.?.?.? Can you compare the parameters for speed control and gain and deadband of all the...

PLC Programmer, There's loop-checking; there's usually some kind of crank checks (spinning the turbine-generator shaft with the starting means without admitting fuel or energizing the ignitors); there's cooldown (turning gear; ratchet) testing; there's LVDT or position indicator calibration...

JFB, Yeah, sorry; I couldn't resist. I think the exciters you're talking about are Alterrex and/or Generrex, right? They were actually rotating exciters of some sort (I've never actually seen either, most of my experience being with CTs of much smaller output than LSTGs). Other than...

George, I agree with Kevin that it's totally possible these days, and was more difficult even just 10 years ago. However, I would definitely NOT want to be the person in charge of getting all of the manufacturers of the various pieces of equipment to submit their control requirements...

karim elrawy, Check the push-buttons; they require oil for smooth operation. Or, it's possible that the brushes are leaking. Seriously though, exciters on GE-design Frame 9# heavy duty gas turbines don't require oil. The oil is likely leaking out of the bearing housing/pedestal on the...

Martin Crummy, The first question to ask is: When did the problem start? Has this scheme worked properly in the past, but just recently it has started misbehaving? I'm not very clear on the sequence of events. When does Engine 2 take all the load--before the bus-tie is closed, I presume...

izhar/Farhan, Thanks very much for the feedback! "Feedback is the most important contribution!"(c) here at control.com; it's what let's others who read these threads know if the information provided was helpful--or not. It really is what sets this forum apart from so many others, getting the...

humble3, When did this problem start? After a maintenance outage? Suddenly? We presume you are measuring the bearing header pressure downstream of VPR2-1 (using 96QA-2 AND the pressure gauge on the Accessory Gage Cabinet for comparison's sake). The L.O. System P&ID (Piping Schematic)...

Hi, Semos, Congratulations on your project! (Sounds like a course assignment designed to make one investigate and think about electrical power generation....) Electrical power generation is all about producing torque in one location, converting that torque to amperes (at some voltage)...

George, First fire of a gas turbine generally means that you have already <b>proven</b> that the fuel stop valve(s) will be closed by the turbine control system when a trip condition has been detected. By every means possible (some turbine controls have two independent means of electrically...

John, Thanks for sharing your experiences and thoughts. I'd like to, again, play Devil's Advocate as this is a subject which is very near and dear to my heart and one which I've spent considerable time (and effort) trying to understand and to be able to counter with effective substantiation...

Bill, You may have something with the synchronizer needing to make at least one adjustment to "feel good" about the readings it's seeing. I have seen this before, but it was a long time when digital control systems weren't as sophisticated and well-trusted as they are today. The generator...

Neo, I would say, yes; open another thread for L4. As for the L14HT in L1X. What did the L1X rung look like from the other site? And what kind of turbine was that L1X rung being used for (another Frame 6B)? I think it might be acceptable to use a NO L14HR in place of the NO L14HT in L1X...

No; that doesn't seem like it would harm the unit. But, from the information provided it also seems like the synchronizer isn't working correctly as programmed.

Yes, that is possible.

Bill, I looked back and I see the control system is Emerson Ovation.

Neo, Do you want to take this any further--the L14HT analysis? I got the impression, from this thread, that there may have been an issue with 88CR and starting that was being investigated, and I wonder if if's because of the L14HT contact in the L1X rung. I really don't think it belongs...

Bill, Hmmm. It's noted that you didn't mention what your new turbine control system was nor what help they supplier has offered with this problem. Auto-synchronizing involves two things: voltage matching and speed (frequency) matching. Well, truth be told, both generator voltage and...

Karim Elrawy, Have you looked in the Maintenance Manuals provided with the turbine for the manufacturer's documentation? Have you looked on-line at the manufacturer's website for any manuals? Have you contacted the manufacturer to ask if they have any certified refurbishment shops in...