from the Controls and Instrumentation department...Turbine Stress Evaluator
How do you calculate load and speed margins from temperature margins, during start up and rolling of steam turbine to avoid/minimize thermal stresses?
This is what the original company that makes the turbine spends lots of time figuring out! If it...
from the TPP department...To remove the steam turbine tripping from Trip Oil
Why tripping given for steam turbine for trip oil
We need to know what type of control system your steam turbine has. Also, if you could state the...
from the operations department...Steam Turbine Control Valves- GE D11
Regarding Protection on Steam Turbine in response to the control valve and stop valves position feedback.
The wobulator I've dealt with is in place to to make the RPM "wobble" when running the...
from the Forum department...Boiler control
what are the main differences between control of subcritical boiler and super critical boiler
Your desire to learn about supercritical operations is a very large undertaking for this forum. ...
from the Non-commercial, but could develop into. department...Getting IO into/out of a PC
Asking how to use I/O on a PC
There are lots of inexpensive USB Data Acquisition solutions (DAQ)...google USB DAQ. I got one...
from the Forum department...Steam turbine extraction valve
What type of valve is a steam turbine extraction valve?
>What type of valve is a "steam turbine extraction valve"? Which make actuators are...
from the Power Division department...MODBUS control of power sources and loads
Control of power sources and loads via MODBUS
Fair enough. Then sounds like you want a PLC or something of that like. For another example see...
If I understand your problem correctly, it is easily solved by off the shelf components. I know it...
from the Forum department...HP bypass flow in power plant
Is HP bypass flow necessary to control power plant?
>I have a question about thermal power >plant. Is HP bypass flow necessary to >control...
from the power department...Gas turbine control system upgrade
upgrade of GE turbine new control system
The OEM will almost always say that "your system is obsolete and must be upgraded". And...
from the I&C department...FSSS CONTROL OF BOILER
Is there any separate control for Boiler instead of direct termination of instruments to DCS control.
I agree with above. He used the term "flame safety". I grew up with it being called...
from the Operations department...Steam turbine overspeed
Why does the ST need to be hot for the overspeed test
I do not see the reasoning for 2 to 3 days of operation required before doing an overspeed test. ...
The short answer is YES!...
from the control & Instrumentation department...Opening Vacuum Breaker during Turbine Trip
Can anybody explain me why we open condenser vacuum breaker in case of turbine trip?
It's tough to give a solid explanation without understanding what type of equipment the original...
In the plants I've been in, a trip did not cause any time of "vacuum breaker" to open. In...
from the energy department...sudden axial shift
sudden axial shift in 55MW steam turbine
We need more information. Axial position is controlled by the thrust bearing. If things are...
from the Forum department...Speed of Synchronous Generator
Why Speed of Synchronous Generator decrease with increasing speed?
This thread is amazingly stereotypical "enginerd" talk (and I mean that as a joke, not...
from the Forum department...GE LM6000 PC Sprint Exhaust Temp
Exhaust temperature variation at different load conditions
You are welcome. I remember seeing the control philosophy (or limitations) presented in...
I'd have to dig through some of my documentation (and it's a lot of stuff not really organized),...
from the Mech. E department...Boiler load control: Header pressure or steam flow
What determines the set point for boiler-turbine loads!!
This two-part article may help with the fundamentals. It's "Boiler tuning basics" from...
from the Forum department...Relation between torque and generator output power
It is about my diploma project. I want to show a relationship between quantity of steam, steam pressure, torque of the prime-mover, torque of the generator and the total output power
Glad we could help you out. Another industry standard book that is very in depth and specific on...
I think the original poster would benefit from doing a plant heat balance for the intended system. ...
from the Forum department...sliding pressure operation
difference between constant pressure operation and sliding pressure operation of boilers
Constant pressure keeps the same working pressure in the boiler and controls power output by using...
from the Operation and Maintenance department...Vibration in bearing becomes alarming when load increases above 25 MW
Vibration in No.1 bearing becomes alarming when load increases above 25 MW in Frame 6 GT
Much more data is needed AND an experienced vibration professional is needed to help you pinpoint...
from the Instrumentation department...Moog valve cleaning with thinner
Is it good practice to clean Moog valve with thinner or what is your opinion for Moog servo valve service?
That story of going to a major vendor (perhaps an OEM????) sounds very familiar for many...
from the Engineering department...Gas Turbine Control System - Frame 6 with Allen -Bradley's Panel View HMI
difference in control system model between ol series and Allen -Bradley's Panel View 1400e
GE Package Power (Aeroderivs) mostly uses Woodward Micronet. GE Energy Speedtronic works so...
from the Power Technology Student department...Voltage control on a large power producing generator
Student taking Power Plant Industry classes from Bismarck State College - controlling generator output voltage
I will piggy back CSA's post to help illustrate a point. Hopefully my ASCII diagram is correct and...
from the Electrical engg department...Generator Field
Reason for using DC power for alternator field winding.
>Can anybody give me an explanation for >giving DC supply only to alternator >field? ...
from the I & E department...Replacement comparable to Bently 3500
Looking for a replacement for Bently 3300 and comparable to Bently 3500.
> The markup on a standard Dell server for the historian was astonishing and gave > us the...
from the Engineer department...Gas turbine output
Gas turbine output
why would somebody need a megwatt reserve function when any unit (GE or not) could be run in speed...
from the Maintenance department...Diesel Generator set
Diesel Generator speed hunting
You need to give more information. What type of controller? Has the unit ever been stable? ...
from the Forum department...Periodics for Frame9 turbine
Periodic maintenance for control and electrical equipment of Frame 9 machine
JPE, In the past I've registered with the GE portal you list but it didn't get me anywhere...
from the Forum department...Electrical overspeed test for Mark V steam turbine
Electrical overspeed test for GE Mark V steam turbine
The P-core settings are physically changed by moving the jumpers on the P-core card. The IO...
My memory may be off a little bit, but on the MkV steam turbine I worked with there were multiple...
from the Forum department...Mark IV Speed Ratio Valve LVDT/HSAA problem (GE Frame 6)
'2 out of 3' LVDT / Speed ratio valve problem is causing the generator's fuel flow to dip and then spike intermittently.
In the first post, you stated: T - Receives 96SR-1 (4A) & 96SR-2 (4B) outputs (HIGH SELECT)...
from the MkV HMI department...view2t.exe Trigger in MkV HMI
catching system transients with MkV HMI View2.exe or view2t.exe
View2T is pretty self explanatory in the documentation. I understand that. I was looking more for...
from the Power Plant department...Loss of excitation
Loss of excitation, no voltage and no current in startup phase of a generator
or your generator could be blown up...yup I've seen it. "couldn't excite the unit" ...
from the IMD department...9FA tripping at base load
We have 4x9FAs with Mark-VIe system. When machine is operating at Base load either in Isch or Droop mode by increasing just 1MW load at base load does GT trips..?
I'd just like to add that often the terminology is vendor specific. For instance, in as CSA has...
from the Student Research department...Barriers Utilities face when upgrading SCADA systems / reasons why SCADA systems are not used to their fullest extent
I am a student at the University of Missouri involved with a small portion of a research project titled "Studying Distribution System Hydraulics and Flow Dynamics to Improve Water Utility Operational Decision Making".
Jesse, I thought and still think like you do. I work in power, but at a public utility. There...
from the Power and Utilties department...Governor modes of operation
Governor modes of operation - Droop , Iso , load control explained in detail
One thing that never ceases to amaze me is how complicated and ignorant usually smart people make...
from the Forum department...Droop speed control system
Adjustable droop in electronic control system.
I've had the pleasure of getting up close with GE EHC and MHC turbines. On a MHC mechanical...
from the Mechanical department...Economizer Tube Failure
In a new CFBC boiler we are facing economiser tube failure frequently
How big is the boiler (MW)? What is the inlet and exit temp of the economizer. What is operating...
from the thermal department...Setting Frequency for 505 governor
505 governor option for setting frequency to 50 HZ.
QUOTE: If the utility tie breaker opens, the control automatically resets the speed reference to...
from the Forum department...Question on Career Path, PE
What direction should a newbie pursue?
Flour, Shaw, Bechtel, and all the other big EPC's all have commissioning departments/experts. Get...
I am by no means a control expert. I just know enough to usually get things working (and then it...
Opinions are my own from my experience, but I'm your peer. 1) Take the PE and pass it. At the...
from the Automation List department...Adding nodes to Mark V PCI Arcnet
Adding two nodes to the Mark V Arcnet network, so that the balance of plant server can access Mark V data for monitoring, control and historian
>While this seems great at first, this software cannot be used to make > sequencing...
from the Maintenance department...Steam turbine governor control swing
Steam turbine governor control swing
....and unlike GE, Woodward usually has very good documentation and nearly all of it is available...
The past always looks better than it was. It's only pleasant because
it isn't here.
-- Finley Peter Dunne (Mr. Dooley)
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