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Karim, Continuing to run the unit with a high exhaust differential does not bode well for long-term parts life. But, if they need the machine to drive the compressors then sometimes the loss of parts life is worth the revenue--and that's what Managers get paid to do: analyze risk versus...

Ah, alarm text messages in French. On a forum based in US English. The usual cause for a couple of these alarms is a momentary loss in communications between <C> and <Q>. Some older PROMsets would trip on a loss of comm's. No clue on the third.

Damene, In my personal experience, I have seen far too many sites use high-powered radios in the control compartment/room where the Mark VI is located, sometimes with the Mark VI control panel doors open--even just slightly. Combine this with the fact that proper earthing/grounding...

This is another one of those personal/site preference issues--very similar to where should the shield drain wire be terminated to earth (ground), and should it be continuous through multiple JBs or not. However, there are some local codes and regulations which do require one end of the cables to...

narayanshree, In your first post you inquired about the <b>GT</b> maximum operating angle and Contract Performance Guarantee Testing. Now, you're talking about Combined Cycle Performance Guarantee. The two are not the same. The information I have provided refers exclusively to the...

reboucasaraujo, My best guess is that the gas control valve LVDT is not calibrated correctly, OR that the liquid fuel flow divider feedback scaling is not exactly what it should be or the liquid fuel supply pressure is not what it should be, OR that unit isn't using "straight" Droop Speed...

You don't need to post pictures (and we can't here at control.com); everything you describe is to be expected. When the generator breaker is closed the actual speed is fixed (limited; controlled) by grid frequency. Droop speed control knows--and relies--on that fact. Increasing the speed...

narayanshree, > a. As per documentation provided by GE (GEK 110899), performance correction curve are dependent on IGV Angle > among other parameters. It implies that any correction curve is for a particular IGV Angle and if IGV Angle changes, > correction curve should undergo change...

Bob Johnston, It's been a long time since I've worked on a Frame 5 (unfortunately), but if I remember correctly most GE-design heavy duty gas turbines use the same hydraulic pump for both the Main and the Auxiliary. The difference is that the main is mounted horizontally on the Acc. Gear Box...

kranthikiran326, External Load Control is a method for using an analog signal (usually) from a external source as the load setpoint for the turbine. Usually, a 4-20 mA signal, proportional to the rating of the unit (for example a turbine rated at 25 MW would have an External Load Setpoint...

kranthikiran326, In my personal opinion it should be possible to switch each of the Speedtronic control panels to Isoch mode--and then the operators would not have to make continual manual adjustments to load. At the very least, it is definitely worth a try for a few hours on each machine...

Kevin K, > I realize that I am keeping some of the details vague. I am hoping that by keeping the discussion generic that I and the > readers of forum can advance our knowledge of generators and synchronizing with the grid irrespective of the particulars > at my specific facility...

KevinK, > As best that I can determine the get-set stays in > isochronous mode the entire time it is paralleling the > utility grid; the gen-set is also trying to reduce power > output to zero as it is paralleling. I can see where that > could cause problems. This seems to the root of...

As Bob Johnston says, if the discharge pressure of the Aux. Hyd. Pump is higher than normal then the differential across the hydraulic filters will also be higher than normal. Another possibility is that the wrong hydraulic filters have been installed which are causing a very high...

FEFO/Adel_S, For further evidence that this problem is most likely related to moisture condensation on the secondary flame detector lenses if there were no diffusion flame in the secondary combustion zone when the unit switched to Lean-Lean mode from Primary mode the load would drop. Load is...

Adel_s and FEFO, <b>We need to know what the ambient conditions are at the site(S).</b> Is it humid? Is it hot and humid? <b>Is the inlet air cooled or chilled by some method?</b> Evaporative coolers? Chillers? Foggers? Wet compression? <b>Without more information</b> (as requested) I'm...

QUESTIONs are good; doubts are not. I suggest you look at some YouTube videos about synchronous generators, or consult a site such as www.wikipedia.org for some videos or pictures of synchronous generator construction and operation. The stator (also called the armature) consists of...

How is this thread different from: http://www.control.com/thread/1418064051 I submit it's the same turbine/site. And if it's not, the same information applies to both threads. <b>Moderator's note:</b> different author.

You're very welcome; glad to help when I can. This is going to be very brief. There's no way we can tell you how your plant should be operated. We aren't privy to plant design details, or plant configuration. I can tell you that if each of the four turbine-generators independently supply...

Also, most OEMs/packagers don't have machines they can run for testing and data-gathering. Instead, they take massive amounts of data during commissioning ("performance testing") which they then feed into large, powerful computers to predict performance of present and future machines (it's...