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Control.com member...
Member Information and Posts by CSA
Originally posted by Simon on 25 September, 2014 - 4:21 am
Why do people who believe that the OEM is the best alternative for off-warranty service & retrofit contracts why?
New Replies:
Simon, Great philosophical question, and I'm going to try to answer each of your points. >...
Topic: Power generation equipment control.
from the Power Generation department...
When Will 88CR start?
Originally posted by Neo on 10 September, 2014 - 10:27 am
GT start up sequence, when will 88CR get started?
New Replies:
Neo, I believe L14HT will be a logic "1" when the shaft speed is above 8.4% speed...
Neo, Whoa! What about L14HT at your site?!?!?! How is L14HT used at your site? What are...
Neo, Is the unit experiencing problems during start-up? High exhaust temperatures? High exhaust...
Neo, I think it's best to think of it in this way: When the unit is not on speed control...
Neo, It would probably be better if you asked off-topic questions like this in new, separate...
Neo,
 >  L3RS    L1S       L4       L1XX    L5EX   L3SFLT    L1X
...
Neo, You didn't post L1X.... It's kind of critical to the whole discussion. And, it's also kind...
Neo, Can you repeat question/response, please? I don't want to comment on L1X, L1Z until you...
Neo, You don't have to ask--no one does! I wouldn't comment until you posted L1x and L1Z from...
Neo, You used to use the Thumbs Up/Thumbs Down indicator when you found the post useful or...
Neo, There was another query in the original post, and we'll get to that in a moment. I would...
Hi, Neo, I'm a little confused about where to pick up with the L4 journey at this point.... I...
Topic: Power generation equipment control.
from the E& I department...
Governor Control in Speed Control Mode
Originally posted by Bhavin on 26 September, 2014 - 9:06 am
Islanding problem when grid trips. The case happens only 5 times out of 100, rest everything goes good.
New Replies:
Bhavin/BJM, If you're certain that the boiler can supply sufficient steam to maintain the...
Topic: Power generation equipment control.
from the IMD department...
Mark-VIe Servers
Originally posted by MJ on 27 September, 2014 - 3:58 am
Functions of Servers provided with Mark-VIe
New Replies:
Dear MJ, The PRIMARY difference between the two HMIs is that the Mark VIe...
Topic: Power generation equipment control.
from the E& I department...
Load Shading System
Originally posted by BJM on 26 September, 2014 - 9:13 am
Looking for detail knowledge on the Load shading system
New Replies:
Ah, the seldom-used and little-known practice of load shading. You'll probably have better luck...
Topic: Power generation equipment control.
from the Maintenance department...
Stability of Generators in Isochronous Mode
Originally posted by Erwin on 24 September, 2014 - 1:00 pm
Why are two or more engines (gen sets) in Isochronous mode without load sharing make the system unstable?
New Replies:
Erwin, 1) Yes. Load is equivalent to fuel flow-rate (for internal combustion engines; steam for...
CuriousOne, Effectively--except it doesn't allow for changing the load setpoint very easily. ...
Erwin, It is possible to synchronize two or more generator-sets in isochronous mode without load...
Topic: Power generation equipment control.
from the Operations department...
9FA Gas Turbine Unloading Rate
Originally posted by Stephen Roche on 6 September, 2014 - 3:17 pm
GE 9FA unloading rate in auto stop sequence for multishaft unit.
New Replies:
Steve Roche, Great news! Thanks for the feedback!...
Stephen Roche, Based on the signal names (the 'L' suffix at then end of the signal names you...
SteveRoche, Unfortunately, GE uses the same Control Constant for unloading as for loading when...
Topic: Power generation equipment control.
from the Generator Control department...
Generator Voltage
Originally posted by TexasPower on 23 September, 2014 - 11:22 am
What determines how fast the voltage collapses if you remove the field current?
New Replies:
TexasPower, I know there are formulas for determining residual magnetism of a rotating magnetic...
Originally posted by Ali on 24 September, 2014 - 1:21 am
OPC Communication between Mark-VI and ABB Freelance AC800F fails resulting in hanging of all ABB Operator Stations.
New Replies:
Ali, Mark VI systems are no longer provided by GE; Mark VIe systems are now the standard. This...
Topic: Power generation equipment control.
from the Gas Turbines department...
What Is CEMS Used For?
Originally posted by Daneezy on 20 September, 2014 - 3:53 pm
What is CEMS used for and how does it operate in Power Generation gas turbines (GE Frame 9e)?
New Replies:
> thanks a million..nice contribution.. Happy you were satisfied! Wish we understood why...
Just some clarification.... In general, a CEMS (Continuous Emissions Monitoring System) is a means...
Topic: Power generation equipment control.
from the Forum department...
excitation control
Originally posted by Kamel on 30 September, 2012 - 3:37 am
excitation control
New Replies:
One more answer: You did not say how much you say this MV auxiliary bus-bar voltage change. 10V?...
Topic: Power generation equipment control.
from the Forum department...
Gas Turbine Effect on Refrigeration Cycle
Originally posted by Sadiq on 22 September, 2014 - 2:27 pm
How does gas turbine efficiency effect the refrigeration cycle?
New Replies:
Sadiq, If I understand the question correctly, the efficiency of the gas turbine will not have...
Originally posted by Daneezy on 22 September, 2014 - 4:48 pm
Please what is the difference between a standard combustor and a DLN combustion system?
New Replies:
Daneezy, First of all, there are many "flavours" of DLN--and while some of them are...
Topic: Power generation equipment control.
from the Forum department...
Mark V Diagnostic Alarms
Originally posted by Ivan on 18 September, 2014 - 11:18 am
Mark V TMR control panel, MS5001P, Diagnostic Alarms
New Replies:
Ivan, When the generator breaker is closed it's typical for GE-designed synchronizing circuits...
Ivan, When do these alarms occur? During normal full speed operation with the generator breaker...
Topic: Human-Machine Interface and SCADA.
from the C&I department...
Mark V Signal Scaling in HMI
Originally posted by VM on 11 September, 2014 - 8:25 am
Exciter signals gain in mark V
New Replies:
VM, Can you please post the relevant lines (rows) from IO.ASG? What happened when you put the...
VM, Hmmm.... Well, even if these signals appear in the IO.ASG for a unit, it's not certain they...
Topic: Power generation equipment control.
from the operations department...
AVR Functioning and MVAR control
Originally posted by suryapadhu on 11 September, 2014 - 12:01 pm
AVR Functioning and MVAR control for Gas and Steam turbines
New Replies:
Suryapradhu, Transformer tap changers are available in different configurations, and without...
suryapadhu, Thank you for taking the time to search through the archived threads looking for an...
Topic: Power generation equipment control.
from the CPP department...
Generator Turbine Speed Control
Originally posted by Manoj Baviskar on 10 September, 2014 - 4:10 am
Effect of Reactive load throw off on Turbine (GTG) speed after Generator independent from Grid power.
New Replies:
Manoj, You seem to be providing conflicting information, and you also say, "...Practically,...
Manoj, 1) The fuel was not high at the time of isolation--it drifted higher. There are two...
Manoj Baviskar, To answer your direct question: No; it's not possible for reactive load...
Topic: Power generation equipment control.
from the gas turbine controls department...
Removing Flow Divider Instrumentation on GE 7EA Turbine
Originally posted by Dan on 14 September, 2014 - 9:37 am
GE 7EA turbine, will removing flow divider instrumentation affect operation on Fuel Gas, Mark IV Startup Lockout?
New Replies:
Dan, It should not. You can easily just determinate the speed pickups from the AIO TB and the...
Topic: Power generation equipment control.
from the Mechanical department...
Initial Torque Required for Gas Turbine
Originally posted by Izhar on 2 September, 2014 - 5:21 am
How to calculate the initial torque required by gas turbine
New Replies:
Izhar, and others following this thread, I need to qualify a statement I made in the third...
Izhar, GE-design Frame 9E heavy duty gas turbines previously used hydrogen-cooled generators...
Izhar, Thanks for the correction. And the feedback. 111 A on a 6.3 KV motor seems high, but...
Dear Izhar, It could also be that 20TU-1 (the torque converter "pressurizing"...
Topic: Power generation equipment control.
from the Automation List department...
What makes a generator increase load
Originally posted by kumarash on 10 August, 2008 - 3:49 pm
What makes a generator coupled to a gas turbine increase load when load raise command is issued to Mark V
New Replies:
Marcos Gonzales, Few answers... 1. Reverse power isn't bad for the generator--it's bad for...
Originally posted by vpsopm on 5 September, 2014 - 1:48 pm
2+1 CC GTs both tripped and Steam Turbine was still synchronised on grid producing 30 MW!
New Replies:
otised makes a great point about decreasing steam temperature....
vpsopm, Your question can only be answered by the people who are responsible for the operation...
vpsopm, This could be one of "those" conditions that was never envisioned by the plant...
Topic: Human-Machine Interface and SCADA.
from the Forum department...
Web based HMI for Greenhouse
Originally posted by Bogaat on 20 August, 2014 - 1:41 pm
Looking for an affordable OPC Web based HMI solution
New Replies:
Have you looked at: http://pvbrowser.org Open Source and can do OPC XML-DA...
Topic: Power generation equipment control.
from the Power Generation department...
Getting a better understanding of GT control PART 3
Originally posted by Neo on 28 August, 2014 - 10:48 am
Getting a better understanding of GT control PART 3
New Replies:
Neo, Do you want to answer the question about servos, or do you wish to continue with the...
Originally posted by RLovell on 29 August, 2014 - 1:08 pm
My high school students ask when/how/if abstract topics like polynomials, factoring, rational functions are ever actually used in the Real World. I don't know..maybe you do?
New Replies:
Hi, This is such a great question!!! I think all of us when we were learning the basics in...
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