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Control.com member...
Member Information and Posts by otised
Company: General Electric International, Inc.
Topic: Power generation equipment control.
from the MARK-VIE CONTROL SYSTEM department...
110 vac power supply loss in gas turbine running
Originally posted by BGGTS on 15 June, 2013 - 11:19 pm
110VAC POWER LOSS IN GAS TURBINE FRAME-V RUNNUNG CONDITION
New Replies:
CSA - you are probably correct that the N-TRON IONET switches for the gas turbine are powered by...
If you remove the 110VAC UPS the turbine will trip. The UPS powers the Ethernet network switches...
Originally posted by Abdur Rehman on 12 June, 2013 - 3:27 pm
GT's Turbine accessory and load gear compartments temperature are running very high close to trip value of 450F.
New Replies:
> 2-No P&ID is available for ventilation system of this GT. Note: GE calls their gas...
Originally posted by Uchenna Eneremadu on 14 June, 2013 - 5:22 am
Does the extra duct length (inlet and exhaust) needed in an outdoor arrangement contribute losses to capacity of the Gas Turbine Generator?
New Replies:
If the "extra duct length" increases inlet and/or exhaust pressure drops, then it will...
Topic: Power generation equipment control.
from the simulation department...
Turbine Generator Simulation
Originally posted by Dave on 10 June, 2013 - 2:16 pm
Load limiter question for turbine generator simulation
New Replies:
The "V1 COIL CURRENT(R), V1 COIL CURRENTS(S), and V1 COIL CURRENT(T)" are the currents...
Topic: Power generation equipment control.
from the E&I department...
MARK-VIe Installation
Originally posted by Adeel Imtiaz on 28 May, 2013 - 12:26 am
Upgrading from MARK-II to MARK-VIe control system
New Replies:
Unless you have other reasons for locating the Mark VIe control cabinet in your central control...
Topic: Engineering and workplace issues.
from the Private department...
Mass flow calculation
Originally posted by Moller on 8 December, 2011 - 5:37 am
How to calculate the mass flow of the axial compressor
New Replies:
Cv is the (liquid) flow coefficient for a control valve. The flow equation is: Q = Cv *...
Topic: Power generation equipment control.
from the Forum department...
Load Hunting on GE frame 7
Originally posted by Ahmad on 21 April, 2013 - 4:21 pm
Fuel and Load Hunting after Full speed and massive with generator breaker closed
New Replies:
> And i Forgot to say that the unit is working on Ovation system by Emerson Is the Ovation...
Topic: Power generation equipment control.
from the Forum department...
load rate (stag ms9001fa)
Originally posted by koukos on 11 April, 2013 - 11:50 am
Behavior of a power plant when its load rate (stag ms9001fa) drops.
New Replies:
GE sets the loading rates so as to maximize the operating life of the equipment. Or, perhaps, so as...
Topic: Continuous process industries, DCS questions.
from the automation department...
Drum level control by two element
Originally posted by atish on 11 March, 2013 - 4:53 am
What is cascade control & explain two element in simple language?
New Replies:
> We are having steam pressure, steam flow, for drum level differential > transmitter. with...
Topic: Power generation equipment control.
from the Operation department...
Gas Turbine Fire Mode
Originally posted by SB on 13 March, 2013 - 3:37 am
Need your guide line regarding GT start on fire mode. When this mode is selected and why?
New Replies:
If FIRE mode is selected from shut down condition, when START command is given, the gas turbine...
Topic: Power generation equipment control.
from the control department...
GT FSR for warm up the turbine
Originally posted by Ahmed on 31 January, 2013 - 12:32 pm
FSR fuel reference - margin of FSR warm up
New Replies:
> It is not possible to control the speed of a GE-design heavy duty gas turbine below 95% of...
Originally posted by Sadiya on 20 February, 2013 - 10:51 am
What is the difference between Simple cycle gas turbines and combined cycle gas turbines?
New Replies:
A couple of comments: 1. In GE, we usually referred to combined cycle as those applications that...
Topic: Power generation equipment control.
from the Thermodynamics department...
Gas Turbine-basic
Originally posted by Dhinesh on 21 January, 2013 - 4:53 am
Gas Turbine air system
New Replies:
Perhaps if you knew what we used to call the inlet water sprays it would help you to understand:...
Originally posted by mhs100 on 14 January, 2013 - 2:07 pm
CONVERTING FROM US TO METRIC AND FROM METRIC TO US ON ALL SCREENS JUST BY PRESSING A SINGLE BUTTON
New Replies:
My recollection on this subject is that the gas and steam turbine displays can all be changed at...
Originally posted by ARM on 7 January, 2013 - 10:05 am
I wanted to know that in GE Frame 6 machine Mark VI logic- will exhaust pressure high alarm 63EA will lead to opening of bypass duct damper in combined cycle?
New Replies:
GE would typically open the bypass damper on the 63EA high exhaust pressure alarm. The logic for...
Topic: Engineering and workplace issues.
from the Power Generation department...
GT Losing power Frame 6B from 33MW to 22MW at Base Load
Originally posted by Mambo on 23 December, 2012 - 9:45 am
Hello Fiends, I am told that the out put performance of Gas turbine has gone down from 32 MW at Base to 23 MW Base load.
New Replies:
Mambo, The settings likely to change are those for the SRV P2 control and the various FSR...
The reduction in heating value of the gas fuel most definitely makes a difference! If this is a...
Topic: Continuous process industries, DCS questions.
from the MARK V department...
SRV doesn't work
Originally posted by Zihni on 9 December, 2012 - 8:38 am
I work in a CCPP which have two F9E and MS9001 GTs. We have a problem related to operation SRV valve in our GT. GTs work under Mark V control. Can you please help us?
New Replies:
CSA, I did say "fairly" constant. That is also probably not accurate - I forgot to...
Voyager2, The SRV does NOT control turbine speed. The SRV controls P2 (intervalve) pressure as a...
Topic: Power generation equipment control.
from the Freq Response department...
Preselect Load with Remote Control
Originally posted by Sean on 29 November, 2012 - 11:21 pm
Frequency Response with Remote Control (Mark V)
New Replies:
Sean, You state: "One correction that DCS remote control to MKV is not 4-20mA but a...
> Pre-Selected Load Control usually can only be active when the unit is in...
I think you really need to get GE involved in this. It sounds like you may need secondary frequency...
I don't know whether 6% droop in single shaft combined cycle is "standard" or not. I was...
The easiest way to disable the preselected load control is for the operator to give a momentary...
Topic: Power generation equipment control.
from the R&D gas department...
LP drum pressure control
Originally posted by srinivas on 29 November, 2012 - 11:40 pm
Why control LP drum pressure, some times IP drum pressure, but not HP drum pressure in triple pressure boiler?
New Replies:
The HP drum pressure is limited, rather than controlled, by the HP bypass pressure control and...
Topic: Sensor technologies.
from the Instrumentation department...
analog 4-20mA output transmision
Originally posted by Kiyani on 10 May, 2012 - 6:02 pm
Analyzers analog output signal 4-20mA transmission
New Replies:
There is no technical reason against running 4-20 mA analog input and output signals in the same...
Originally posted by Hal Popplewell on 14 October, 2012 - 12:28 pm
We have a fabricator to whom we have paid millions of dollars who refuses to turn over any logic diagrams, ladder logic, HMI, etc., claiming it to be proprietary.
New Replies:
A lot depends on your purchase documents. Did you specify the equipment and if so, did you specify...
Topic: Continuous process industries, DCS questions.
from the IC department...
Temperture Matching
Originally posted by ic on 1 October, 2012 - 4:36 pm
IN GE mark 6
why Temp matching must be done at TNR 100.4 and 100.5
and what meaning her TNR (speed referance )
and this valve change without changing the speed
New Replies:
You didn't say what the control system is. You also didn't say whether this is single shaft or...
Topic: Power generation equipment control.
from the Process department...
Inlet Filter DP
Originally posted by Cris on 26 April, 2012 - 10:03 am
Inlet Filter DP
New Replies:
If there is filter fouling it will increase the compressor inlet DP reading. Note, there may be 2...
The compressor inlet DP sensor is used as part of the airflow calculation, not for filter fouling...
Topic: Power generation equipment control.
from the Instrument and control department...
Shutdown VS Trip in Mark VI for GE frame V gas turbine
Originally posted by Raza HAider on 1 October, 2012 - 3:30 am
What is the difference between trip and shutdown in Mark VI
New Replies:
Trip instantly cuts off the fuel to the gas turbine. Protective shutdown initiates a...
Topic: Power generation equipment control.
from the Forum department...
GE Proximetor vibration
Originally posted by Kamel on 26 September, 2012 - 6:16 pm
how to use the proximitor page in mark 6?
New Replies:
On their heavy duty gas turbines, GE uses the seismic probes for protection and the proximity...
Topic: Power generation equipment control.
from the Forum department...
turning gear speed
Originally posted by getdy on 19 September, 2012 - 8:18 pm
turning gear speed questions
New Replies:
LCI is Load Commutated Inverter, and is used when the generator is also used as a starting motor....
Topic: Power generation equipment control.
from the Operation department...
Turbine Exhaust Pressure
Originally posted by Fai on 5 September, 2012 - 3:27 am
Causes and Effects in rising of Turbine Exhaust Pressure
New Replies:
The usual cause for an increase in exhaust pressure is an obstruction in the exhaust system. In...
Topic: Power generation equipment control.
from the Forum department...
Gas turbine Project in Africa
Originally posted by greenearth on 28 August, 2012 - 7:04 am
To connect Crude Oil fields to Gas power stations in three African countries.
New Replies:
Bob, I fully agree with your comments about getting some expert advice. I have one comment on...
Originally posted by Oluwafemi Ogundaisi on 7 September, 2011 - 10:43 am
Experiencing high vibration on bearing 1 and 2 (up to 0.99 inch per second) at about 95% full speed to fsnl. MS6001B [frame 6]
New Replies:
If it is a GE frame 6, the IGV's are modulated. If it is simple cycle, they may effectively be...
> ALso, our PLC control system is not Mark IV but Speedtronic systems. Frame 6B (MS6001B) All...
Originally posted by Harish on 14 June, 2012 - 10:20 am
Thermocouple measurement- Static or total temperature?
New Replies:
The exhaust temperature measurement on a GE gas turbine is total temperature. (The thermocouple...
Topic: Continuous process industries, DCS questions.
from the Instrumentation/Commissioning department...
DP flow, How to setup in DCS
Originally posted by Rajesh Kumar on 7 June, 2012 - 8:23 am
I want to know do we need to the range to calculate flow inside DCS?
New Replies:
It depends on what the DCS is doing to calculate the flow from this signal. Most DCS will convert...
Topic: Continuous process industries, DCS questions.
from the Automation List department...
Control Valve Choking
Originally posted by Shailesh C Patel on 17 November, 2005 - 5:03 pm
i have some confusion about control valve choking phenomena...
New Replies:
> what is a mach number? Mach number is the ratio of the actual fluid velocity to the...
Topic: Power generation equipment control.
from the 6B Gas Turbine department...
6B Gas Turbine
Originally posted by phd on 8 April, 2012 - 10:46 am
When Grid disconnected suddenly both GT's reached to the island mode. Both GT's on the DROOP mode. We were trying to keep one m/c on ISOCH mode & other on the Droop mode.
New Replies:
It is not completely clear which machine is DROOP and which is ISOCH. Normal effect of running 2...
Topic: Power generation equipment control.
from the Mark-V department...
CPD and P2 transmitter fail notification
Originally posted by Mark-V learner on 2 April, 2012 - 10:54 am
CPD or P2 transmitter fails, but we are not getting alarms or detection in the Mark-V.Is
New Replies:
If your concern was failure of one of redundant transmitters, you should get a "high...
Topic: Information resources, documentation.
from the Mechanical/operation/electriacl department...
GTG frame V 5361 performance at 105 % and above of capacity
Originally posted by Ramesh Thakur on 4 December, 2010 - 2:05 am
What are the problems that may occur if a Gas Turbine GTG frame V model 5361 runs above 105% of the its capacity?
New Replies:
>> at -40 F the only thing you have to worry about is the capacity of your gearbox ...
Topic: Engineering and workplace issues.
from the Forum department...
Firing Temperature
Originally posted by abrahash on 11 March, 2012 - 6:25 am
Firing Temperature 9E- different Fuel
New Replies:
> Water injection is used only for liquid fuel and how is SOx (CEMS) controlled during liquid...
Water injection is used for liquid fuel because there is no DLN system available for liquid fuels...
Topic: Power generation equipment control.
from the Gas Turbine department...
Raise and lower turbine speed during load
Originally posted by Mr on 5 March, 2012 - 2:49 am
Can we raise and lower turbine speed during load
New Replies:
OOPS! I read your original posting too quickly. I thought you meant speed/load setpoint, but now I...
Go to the load control screen on the HMI and use the RAISE or LOWER "pushbutton." This...
Topic: Power generation equipment control.
from the power operation department...
unable to start gas turbine
Originally posted by ahdash on 16 February, 2012 - 4:42 am
Frame 5 mark II GT we still unable to start the machine
New Replies:
One comment on 14HS setting in the following statement by Bob Johnston: > 2) Getting 14HA is...
Topic: Power generation equipment control.
from the instrumentation department...
Why exhaust Temperature curve is negative
Originally posted by aliya on 1 February, 2012 - 12:37 pm
How negative temperature control curve keep firing temperature constant
New Replies:
Before the "corner" point (on the horizontal part of the control curve) the firing...
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