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Control.com member...
Member Information and Posts by CSA
Topic: Power generation equipment control.
from the Controls department...
Why Minimum Value Gate Used in GT controls?
Originally posted by 4_20 mA on 21 January, 2013 - 10:03 am
I have seen this Minimum value gate for controlling GT's and Booster Compressor in couple of CCPP.
New Replies:
fluidflow, Yes; it's unfortunate that too many plants do not allow interested parties to open...
Neo, I believe the 33.4% value you are referring to is an upper limit on acceleration...
fluidflow, Pretty good description; but I would be surprised if FSR actually goes to 33% during...
Neo, What the heck is a "DEH"?...
fluidflow, Please list the events you believe occur during a start from zero speed, including...
Topic: Power generation equipment control.
from the Change in level as temperature change department...
Lube oil level
Originally posted by Yassar on 25 July, 2014 - 2:55 am
Lube oil level dropping as temperature increases
New Replies:
Yassar, Are you concerned about a leak or leaks? Increased consumption when the oil is hot? Are...
Topic: Engineering and workplace issues.
from the Operation department...
Using Synthetic Oil in Gas Generator
Originally posted by GE on 24 July, 2014 - 8:55 am
Why use synthetic oil in GE LM 2500 gas turbine?
New Replies:
GE, The gas generator of GE LM units is an aircraft engine, and most aircraft engines are built...
Topic: Power generation equipment control.
from the POWER PLANT department...
IGV for DLN Type Without IBH
Originally posted by ABDI on 24 July, 2014 - 1:56 am
If a turbine has DLN (Dry Low NOx) combustors, IGV exhaust temperature control is not operator-selectable. Is it always on?
New Replies:
Killz has it almost correct, in that the IGVs are used to control the air flow into the...
Topic: Power generation equipment control.
from the Power Generation department...
Getting a better understanding of GT control PART 2
Originally posted by Neo on 11 July, 2014 - 10:48 pm
Getting a better understanding of GT control PART 2.
New Replies:
Neo, Seems my reply to this post never got posted.... I've been having problems with this...
Neo, Whenever a field engineer says he or she is going on a "trip of a lifetime" it...
Neo, First, you (and anyone else reading this) is quite welcome for any help or insight I may...
Topic: Power generation equipment control.
from the Maintenance department...
Problems with air intake and dirty turbine
Originally posted by Arianna Mambrini on 23 July, 2014 - 4:30 am
Air intake filters clean but turbine dirty
New Replies:
Arianna, Sounds like the filters are relatively new. When was the turbine last washed before the...
Topic: Power generation equipment control.
from the Mechanical department...
Exit Guide vanes of Gas Turbines
Originally posted by Izhar on 19 July, 2014 - 4:24 pm
Gas turbine exit guide vanes and how to use them
New Replies:
Izhar, The description below presumes your questions refer to a GE-design heavy duty gas...
Topic: Power generation equipment control.
from the Maintenance department...
Governor Control
Originally posted by Scott_F on 30 April, 2006 - 8:22 am
Definition of Droop and Isoch
New Replies:
arun, Okay, .... Under your scenario with three gen-sets operating in parallel, one in Isoch...
Originally posted by SB on 19 July, 2014 - 4:51 pm
Please help understanding control specification of GE-design heavy duty gas turbine
New Replies:
SB, The section you provided seems to be from a very early Mark IV Control Specification. The...
Topic: Power generation equipment control.
from the serious department...
charge accumulator
Originally posted by Kene on 23 October, 2011 - 1:17 pm
charge accumulator method
New Replies:
MJ, You should be able to find the pressure listed on the Device Summary for the machine. The...
Originally posted by Neo on 5 May, 2014 - 8:28 am
How to get a better understanding of gas turbine control?
New Replies:
SB, Inversion masking. Okay. I have to make this short as I've just been given a last-minute...
Batman, You're very welcome. Thanks for the feedback!...
otised, I'm going to use 'Engineering Inertia' in the future, probably many times. You're so...
Batman, I likely didn't address your explanation of what's happening--but it's basically...
Batman, L4Y is used in other rungs, not just L4S. The reason there is a timer at all is to...
Neo, I think it will be best if we examine most every trip condition--not all of them--but...
Batman, Good on you for expanding your knowledge; it's very helpful for mechanical engineers to...
Neo, Let's back up just a minute, please, and explain why you wanted to remove L94SD from the...
Neo, Thank you for the kind words. Yes; I agree with your sentence describing the L94T rung. ...
Neo, Yes; L94T is very important. L4 will drop out (goes to a logic "0") when either...
Topic: Power generation equipment control.
from the maintenance department...
Operation of speed control loop FSRNV3
Originally posted by saha on 12 July, 2014 - 7:45 am
Operation of speed control loop FSRNV3
New Replies:
saha, GE frequently leaves some unused signals in the CSP--especially in Mark V. Sometimes, as...
Topic: Power generation equipment control.
from the Forum department...
what does the "CROSS-TALK" mean?
Originally posted by shunli on 12 July, 2014 - 11:20 am
Please define Cross Talk and PCC
New Replies:
shunli, Pcc - Pressure-Combustion Chamber (the pressure inside the combustion liner ...
Topic: Power generation equipment control.
from the Forum department...
GE Mark VI/VIe HMI and Software Questions
Originally posted by Kevin on 8 July, 2014 - 8:17 pm
Specific questions about Mark VI and VIe.
New Replies:
Kevin, As I've said, I'm not really an expert by any stretch of the imagination on all the...
Kevin, Welcome to the world of Speedtronic turbine control systems in the age of Mark VI and...
Topic: Power generation equipment control.
from the Gas Turbine Controls department...
DLN1 facing secondary flame out during premix to lean lean
Originally posted by SSV on 9 July, 2014 - 2:01 pm
DLN1 facing secondary flame out during premix to lean lean
New Replies:
SSV, The process is that when TTRF1 drops below the Premix-to-Lean-Lean transfer point drop-out...
Topic: Engineering and workplace issues.
from the Forum department...
Dew Point temperature of Natural Gas
Originally posted by Lucky on 11 July, 2014 - 2:49 am
How to calculate the dew point temperature of the Natural Gas?
New Replies:
Lucky, I would imagine the turbines at your site have DLN-I combustors, because that's usually...
Topic: Power generation equipment control.
from the maintenance department...
FSR Startup Temperature
Originally posted by saha on 10 July, 2014 - 10:43 am
Compressor Discharge temperature & FSR startup (FSRSU)relationship
New Replies:
saha, Please follow the CQTC signal from the input to the FSRSUV1 block back to where it is...
Topic: Power generation equipment control.
from the Technical dept. department...
Cannot Print alarms from MKVI control system
Originally posted by Nguyen Thanh Son on 7 July, 2014 - 12:18 pm
problem: Cannot Print alarm messages in MKVI control system
New Replies:
Nguyen Thanh Son, The Mark VI turbine control panel broadcasts alarms and events on the UDH. In...
Nguyen Thanh Son, I forgot a simple "test": Have you used the 'Print a Test Page'...
Nguyen Thanh Son, I thought I posted a detailed set of questions yesterday, but it seems to have...
Originally posted by Ali on 7 July, 2014 - 10:09 pm
GE MARK VI for 7F DLN2.6 Machines
New Replies:
Ali, Thanks very much for the feedback! Also, congratulations on finding the problem!...
Ali, Without being able to see the application code running in the Mark VI at your site, it's...
Topic: Power generation equipment control.
from the INSTRUMENTATION department...
Calibrating SRV with HR pump
Originally posted by Not the real CSA on 9 July, 2014 - 7:45 pm
What is the correct procedure for calibrating SRV with HR pump

New Replies:
H.A.R., There have been sites that have successfully used some additional tubing sections and...
Topic: Engineering and workplace issues.
from the Controls department...
GE Gas Turbine IGV angle
Originally posted by BND on 28 June, 2014 - 4:31 am
What is the logic? GTG is not operating in Temperature Control mode.
New Replies:
Neo, Here are the kind of questions one should ask after a careful reading of the original...
Neo, What's this "T4*"? We can talk about CSRGV; later. Once we finish with L4T!...
Originally posted by tech77 on 16 May, 2011 - 6:17 am
Magnetic pickup - amplitude or frequency
New Replies:
Ramana, There is a lot of good and applicable information in the previous posts to this thread....
Topic: Power generation equipment control.
from the MARK-VIE SOE ALARM department...
MARK-VIE SOE ALARM
Originally posted by V K GUPTA on 6 July, 2014 - 9:00 am
MARK-VIE SOE ALARM APPEARED FREQUENTLY IN GT RUNNING OR STOP CONDITION
New Replies:
Vimal Gupta, Yes; more information is required. Usually, it's necessary to ground one lead of...
Vimal Gupta, When did this problem start? Has it been ongoing since commissioning of the Mark...
Topic: Continuous process industries, DCS questions.
from the INSTRUMENT department...
Reading Hot Thermocouple
Originally posted by RAJESH on 6 July, 2014 - 4:34 pm
Does a hot thermocouple in junction box give an actual reading?
New Replies:
> if the connections are made properly and proper thermocouple extension wiring > and...
Topic: Power generation equipment control.
from the Mechanical department...
Frame 9E Gas Turbine
Originally posted by Izhar on 7 July, 2014 - 11:52 am
Frame 9E gas tubine impulse/reaction stages and special coating on compressor stages.
New Replies:
Dear, 1) A GE-design Frame 9E heavy duty gas turbine typically has three turbine stages, and as...
Topic: Power generation equipment control.
from the Forum department...
Speed of Synchronous Generator
Originally posted by Muhammad Salman on 26 February, 2010 - 4:08 pm
Why Speed of Synchronous Generator decrease with increasing speed?
New Replies:
niraj, When there is no load on an alternator there will be no current. For example, prior to...
Topic: Power generation equipment control.
from the Electrical Control department...
fault during synchronizing two generator set
Originally posted by Uniport on 1 July, 2014 - 6:06 am
High amps generated in generator during synchronization on NO LOAD.
New Replies:
The Summary for this thread seems to disagree with the body of the thread. At least, something...
Originally posted by aldorian on 28 June, 2014 - 7:46 pm
I would like to know what is the expected speed follow up a trip in a SC5 steam turbine.
New Replies:
MC, 'Trip anticipators' as they are sometimes called are done in different ways by different...
Topic: Human-Machine Interface and SCADA.
from the Automation department...
Multiple monitor one mouse
Originally posted by Old Guy on 30 June, 2014 - 10:17 am
Operator has 2 computers each driving 4 monitors for a total of 8 monitors. Operator wants one mouse/keyboard for all 8. Anyone use "mouse without borders?"
New Replies:
Old Guy, Seems my first post didn't get "picked up"--the one where I mistakenly...
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