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mohamed nawar, >for gas turbine 9fa DLN2.6E why when gas temp reach 17.5 c >unit transfer to extended permix mode? That's an excellent question--for the OEM or packager of your turbine. I presume you are referring to when the gas fuel temperature drops to 17.5 deg C, not when it increases...

Voyager2_kbc, I am presuming you are talking about Demand (User-Defined) displays for stroking/calibrating SRV, GCV and IGV LVDTs. These aren't CIMPLICITY displays--they are TCI displays. That is, they are not pretty graphical displays; they are text-based displays with buttons and variable...

Sobri, <b>When operating at Base Load (CPD-biased exhaust temperature control)</b> when CPD <b><i>increases</b></i> load should <b><i>increase,</b></i> and when CPD <b><i>decreases</b></i> load should <b><i>decrease.</b></i> So, it's very difficult to understand how load increases when CPD...

jason005, It's presumed the diesel-generator (generator-set) had been working fine for some time and has just started exhibiting this behaviour. The amount of power produced by a generator-set (prime mover and generator) is directly proportional the amount of energy flowing into the prime...

muz_sidhu, FQL1 should match FQROUT (sometimes the signal names are different--but the units (lb/sec or kg/sec) should match. If the Speedtronic is calling for 3.2 kg/sec, the fuel flow-rate feedback from the liquid fuel flow divider should be 3.2 kg/sec. At your site, it seems the flow...

Voyager2_kbc, Have a read of this thread: http://www.control.com/thread/1403445367 You are right; something has been done to cause the problem you are experiencing. I'll keep thinking about what could be done to try to undo the thing. In the meantime, get AutoCalibrate up and running...

Dignan, There are many power generation references, such as 'Power Generation Handbook' and others. A good way to search for reference books or textbooks by name is to use Amazon.com or Alibris.com and search by topic. The physical principles of AC power systems are all the...

Tharris, > Of course, terminal voltage is "fixed" and air-gap voltage > can't be measured directly. > But, it can be "inferred" by noting one of parameters, field-excitation. That is, power > to the rotor-winding, i.e., Vr x Ir. What the responder was trying to say is: the problem lies...

Jana, Thanks for the information. And, congratulations--the designers really planned well for plant and personnel safety! Did they think to put an automatic sling to catch the rotor before it falls to the ground, too? That would protect the rotor and anyone or any equipment which might...

<b>Based on the information provided,</b> a unit with one or more controlled extractions can't be expected to shed 90% of load quickly while maintaining pressure/flow to the extraction lines. It wouldn't seem that a single controlled extraction should be so difficult to tune, but multiple...

Voyager, It's not clear if you have an <I> or a GE Mark V HMI. The GE Mark V HMIs run MS-Windows and CIMPLICITY. I'm going to presume they are <I>s, and going to suggest the displays were not configured properly >>OR<< the Password Protection is active on one <I> and not on the other...

Yes. > is this possible that power factor value is equal to 1 practically?

Ivan, Thanks VERY MUCH for the feedback!

Hi, This is yet another excellent example of how electro-hydraulic servo-valves get blamed for all sorts of turbine operating problems and issues. I don't know how the turbine OEM is, but it really doesn't seem to make a difference: lack of understanding about servos and what they do--and...

kwaku, The high-pressure liquid fuel pump clutch should be de-energized any time the unit has successfully transferred from liquid fuel to gas fuel and the unit is operating on 100% gas fuel. This goes for starting the unit with gas fuel selected--the clutch should be de-energized. Now...

sggoat, GE-design F-class heavy duty gas turbines are, indeed, delicate "little" machines. They were designed for base load operation; day-in, day-out base load operation. They were not designed for light loads, or even for load following applications, or for daily--or sometimes, twice...

ARK, I'm also going to ask about the size of the steam turbine (rating), and what kind of actuators are used on the control valves (high-pressure hydraulic; low-pressure hydraulic; pneumatic; other?). I suppose it could be possible that if the generator breaker status is lost (indicating...

ARK, > Actually what i wanted to ask you is when the governor is running at full load in islanded mode without any other > generators in parallel and during this condition if my gen. CB input to the governor is lost, what will be the > consequences? will the governor shuts the valves? or it...

adeel imtiaz, I agree wholeheartedly with MIKEVI--there is no problem running the unit at FSNL for "long" periods of time. I might suggest, though, that the unit be synchronized and lightly loaded (1-3 MW)--this way some electrical power is being produced to offset the cost of fuel...

abdi, No. We've been down this road before with you--several times. Get some training from someone who knows and can explain DLN-I operation to you, your supervisors, your operators, your technicians and your mechanics. There has been more written about DLN-I operation in response to your...