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topcat, This is new information--that the hydraulic supply pressure is fluctuating. 2-3 bar is a pretty significant amount, in my opinion. Does the unit have a hydraulic accumulator? Is it correctly charged and valved in correctly? The hydraulic actuator for the GCV is pretty small; the...

bil07, There is no ARCnet "card" in the Mark V. The StageLink cable connects to a BNC connector on the card in Loc. 6 of <C>. There is a cable that connects the card in Loc. 6 to the TCCA and then to the DCC/SDCC and LCC/SLCC. This is all shown in drawings in the Mark V Maintenance Manual...

floyd699, The fundamentals of paralleling (synchronizing) are still the same--they're just now controlled digitally instead of analog-ly. The same inputs are still required: generator (incoming) voltage; bus (running) voltage; frequency of the two signals; phase angle between the two...

topcat, I've read and re-read the original post, and I only see a description of GCV oscillations at FSNL. And, there's no indication of how much speed (TNH; TNH_RPM) is changing. Is it difficult to synchronize the unit with these GCV oscillations? What is the SRV position at FSNL? At...

topcat, For a TMR Mark V turbine control panel being used on a GE-design Frame 6B heavy duty gas turbine with conventional combustors and a Young & Franklin combined gas valve assembly (SRV & GCV in a single assembly) using a Moog servo-valve rated for 1.0 gpm, the GCV servo regulator gain...

bil07, The good news--again--is that <C> is at A7. That's good. Are you saying that the <I> is not communicating with <C>? That's most likely a StageLink problem, or an ARCnet card problem, or it could be a problem in <C> (the TCCA). Or, by using the LCC/SLCC display keypad you can...

Topcat/Gomez, During LVDT calibration--which should include actual physical measurement of device position--if it's found that the calibrated LVDT feedback is equal to the actual measured physical position but the feedback/actual physical measured position is not equal to the reference value...

bil07, What do you mean by: > Is the current condition normal with the machine running? Yes; if you're not ever going to burn liquid fuel again, the atomizing air system can be removed. But, it requires new fuel nozzle components to do it properly (the atomizing air tip has to be...

bil07, If the processor is at A7, that's good. What Diagnostic Alarms are displayed in the Diagnostic Alarm window for <C>? Have you tried issuing a 'Diagnostic Alarm Reset' from the Diagnostic Alarm Display? The Mark V Maintenance Manual has some sections on using the LCC/SLCC...

Malik787, With just a cursory glance at the application code, I would say that shutting down the turbine compartment vent fan(s) by looking at wheelspace temperatures is most likely going to result in problems for the machine (compressor rubs; bucket tip rubs). The wheelspaces are inside the...

topcat, Hmmmm..... So, this is for a paying job--you're getting paid and we're not? FSKRN1 and FSKRN2 are the Droop Speed Control setpoints; changing them will have an effect on loading/unloading rates and droop. Small changes might not hurt, but large changes will definitely be...

pikachoo99, It's not clear what the end-game is here, and it's not clear where you're getting your information--besides references and textbooks, and some hearsay. I can tell you that there are so many "schemes" out there and there are more perversions of these schemes that have just evolved...

RenegadeGas, Glad to have been of help. Gas turbine controls work can be both lucrative and satisfying. It can also take and keep you away from home for long periods of time. You will always be learning new things, and you will have little time for reading anything other than instruction...

pikachoo99, The answers to your Points 2 & -3 would almost require a book, or at least a small pamphlet. It would require a lot of statements and definitions and explanations--all about Droop- and Isochronous Speed Control. Let's take a grid of, say 500 GW (that's Gigawatts). And let's say...

pikachoo99, Your question makes you sound like many inexperienced power plant managers and -owners. "Why does it take so long to start my generator?!" The reason for the question is that in today's world of renewable energy, thermal power plants can make LOTS of money if they can start and...

> How P2 reference pressure is generated? FPRG = (FPKGNG * TNH) + FPKGNO In words, the P2 pressure reference is equal to (the P2 pressure reference gain multiplied by the turbine shaft speed) plus the P2 pressure reference offset. In other words, the P2 pressure reference is a function...

> Which control principles are commonly used in a DCS in the utilities business? PID? fuzzy logic? All of the above.

kk1989, The principles of generation for any power plant when it comes to AC power production are the same. Chemical energy is converted to pressure which is converted to torque which is applied to the generator. The generator has to run at a constant speed to produce power at a constant...

kk1989, Depends on the configuration of the plant. If the "grid failure" you're talking about is one where the breaker connecting the plant to the grid opens for some reason: 1) Investigate, understand, and if necessary resolve, the condition that caused the breaker to trip 2)...

kk1989, Ah, grid failure. A topic close to my heart. What you're probably referring to is when the breaker that connects the coal thermal power plant to the grid opens("trips"), resulting in an inability to export power to the grid. There can be MANY reasons why the breaker connecting the...