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We really don't have much information here. What Frame size machine (and we're presuming it's a heavy duty machine, not an aero-derivative or some other machine)? Is the cooling water coming from a plant cooling water system, or is it from a self-contained cooling water system that is specific...

That would depend. (I presume we're talking about a three-phase, synchronous generator with some an exciter regulator.) One condition would be whether the exciter regulator (AVR) remained in operation or not. In the case where the exciter regulator didn't trip and remained in operation...

>I really hope that this thread is a joke! +1 And I thought it was just me! Between this and the one about a hooter and a temperature controller (it's since been deleted), I'm not sure were headed in the right direction. Whatever happened to good old deductive reasoning and critical...

G.Rajesh, As long as you don't just "kill" the power to the Mark V Speedtronic by opening the 125 VDC breaker without first opening the switches in the <PD> core, the order of power-down is not important. Note, that all of the motor starters which are controlled by the Speedtronic panel...

You might also consider removing one, or two, or three fuel nozzles to inspect them for coking. As Louis said in an earlier response, this could be a contributor to the problem. As you said, you didn't think you would succeed in the firing attempt even if the Booster AA Compressor was working...

The formula using speed in RPM is <b>INCORRECT</b>. And, what is the <b>actual</b> turbine speed at your site? And you are probably not observing the engineering units, either, in addition to probably missing the negative sign in front of the offset in the manual. And, what's in the manual...

This is good information. This is not atypical behaviour for many combustion turbines when operating at "base load." Also, if the unit was operating with a load setpoint, could the governor have been hunting a little trying to maintain the setpoint? The next question is how does the...

One more thing about using plant instrument air for Booster Atomizing Air during starting on liquid fuel. If you find the pump curve, I believe you will find that it's a fairly substantial flow that the pump provides to the AA piping. I don't think it's possible to take a 12mm or 15mm hose and...

Okay; we're getting somewhere now. Slowly, but we're making forward progress. We have light, wispy vapors (not smoke), and no exhaust temperature increase or spread. Most Frame 9Es have four flame detectors, and fourteen combustors, so it's entirely possible for there to be flame in some cans...

I would ask when this problem started. Is it a relatively new phenomenon, or something that has been happening for some time, say, since commissioning? I would also ask what the grid frequency fluctuations were during the time of the event, and whether the output oscillations corresponded...

Carlos Scott, Thanks for the offer; I'm thinking it over. There are lots of people still working for GE that have said the same things, only better than I ever could. And, there's always the "voice of the Customer", though sometimes they don't actually say what they mean very well. And...

This ain't AutoCAD, now is it? And it's not even trying to be AutoCAD, now is it? (Oops; it might be trying to be AutoCAD; it's certainly trying to be a one-size-fits-all turbine and generator control platform, so it might actually trying to be AutoCAD as well, mightn't it?) And, I'd be willing...

sardar9, In another post you have said that your site is using Mark VIe, and now you say M6 (which I interpret to be Mark VI, not Mark VIe). Let's take another look at your numbers, during light-off, for example. The Frame 7E turbines at your site should be firing at about 10% speed so...

4_20ma, After re-reading your recent posts, I'm still not convinced that there isn't some "anger" there, but I'm going to give you the benefit of the doubt on this one. You can be "upset" that things aren't always as you would expect them to be, but direct your disappointment elsewhere. I'm...

The site sardar9 works at does not have CIMPLICITY 7.5; as I recently learned, it's only recently started shipping with Speedtronic control systems. Communications between the TDC3000 and the Mark <b>VIe</b> are most likely done via a MODBUS link between the TDC3000 and the Mark <b>VIe</b>...

> This > is the time when new friendships are > cemented between the plant main crew and > the external maint groups who though at > loggerheads at most times come together > for a job well done. That's <b><i>soooooo</i> CUTE <i>!!!!!</b></i>

Droop speed control is the way that a machine's load is controlled when being operated in parallel with other turbines on a grid. A turbine with 4% droop will change it's load by 25% of the nameplate rating of the prime mover for every 1% error between the turbine speed reference and the actual...

4_20ma, I'm not really sure I like the tone of your responses; in fact, I don't like them at all. If you've tried putting FPG2 in the Logic Forcing display many times in your life, why wouldn't you tell us you have and provide the results of your attempts? In your first response, you...

The P2 pressure reference formula is (and always has been): FPRG = (TNH * FPKGNG ) + FPKGNO where FPRG = Fuel Pressure Reference-Gas (in psig) TNH = Turbine speed, in percent FPKGNG = P2 Gain (in psig/percent speed) FPKGNO = P2 Offset (in psig) The P2 pressure is different for...

Droop refers to the amount of load that a prime mover will "produce" for a given error in the difference between the turbine speed reference and the actual turbine speed. For example, a machine with 4% droop will change load by 25% of the machine's nameplate rating for each 1% error in the...