Hello friends

I work on GE MARK VI turbine. The question how could I make IGV test and what's the signal which I have to force and do.

 

Obviously, you would not want to attempt this unless the turbine was in a safe condition for this test. I suggest not doing this unless you have been trained appropriately and are absolutely comfortable with your system. Forcing the incorrect signal could cause damage to the equipment and poses a significant personnel safety risk.

If it is a 7fa, you need to have a few permissives met. I think at a minimum you need to force L20TV1X (IGV trip solenoid driver), L4_XTP (TCEA Cross trip), and the L3ADJ? (auto calibrate permissive) associated with your IGVs where the ? represents the servo regulator used. This would typically be L3ADJ5 for the IGVs but you'd need to verify that in your configuration logic. The turbine would typically need to be in "OFF" mode and have no flame detected. You also need hydraulic supply on.

The procedure may vary depending on the version of Toolbox you are running and the type of turbine. On ToolboxST, you have a hardware tab and under that there is a regulator tab. On the regulator tab you should have a valve calibration selection. That is where you would input the command signal and verify feedback for the IGVs. I'm not sure ow it works on Toolbox Classic.

 

To Brian's point, we could tell you the typical things to force and do, but we don't understand what you're trying to do (what is the purpose of the IGV test?) and we don't know enough about your machine (does it have an Aux. Hyd. Pump, or does it have to be CRANKed to develop hydraulic pressure; etc.). There's just too much we don't know. We don't know if the Mark VI is a TMR or SIMPLEX panel. We don't know what trip inputs are connected to the <P> core which might prevent picking-up the Emergency Trip Relays. We just don't have enough information to be of much help.

It's best to get someone to site who can help you understand how to perform whatever "test" you're wanting to perform so that in the future you will know what to do <b>for the turbine at your site.</b> Yes; many GE-design heavy duty gas turbines are similar--some are even 100% alike--but there are also many differences between them, even when they have the same control system (in this case, a Mark VI).

 

thanx friends our turbine is GEms5001 mark vi TMR

and we have problem on igv and the test which we want to do is on off position how could we do that

 

khairi,

Specifically: What is the problem you are having with the IGVs on your MS5001 GE-design heavy duty gas turbine with a Mark VI TMR control system?

If you tell us the problem you are having, there might be a solution or an explanation that will prevent having to stroke the IGVs--which can be difficult on some Frame 5s because not all Frame 5s have Auxiliary (AC motor-driven) hydraulic pumps, and so to establish hydraulic pressure it is necessary to crank the machine.

So, please try to explain the problem as best as possible and we can as best as possible to help understand or resolve the issue.

Please remember: You work with the equipment at your site day in and day out--we don't. You see it day in and day out--we don't. While all GE-design Frame 5 heavy duty gas turbines are very similar (they all compress air, add fuel and combust it, expand the hot gases through a turbine section, and exhaust the hot gases--sometimes just to atmosphere, sometimes to a waste heat recovery steam generator (a "boiler")) they do not all have the same auxiliaries, don't run on the same fuel(s), don't all drive generators, and can be very different from other Frame 5s. In other words, all Frame 5s are not alike. Some even have two shafts--and those who are only experienced with two-shaft Frame 5s sometimes don't realize there are single-shaft Frame 5s.

Help us to help you. Sometimes language can be a problem, but we are generally patient and if you are we can usually get through most issues. You must remember, though, that if you are asking for help then you need to provide the requested information to get the most concise response possible in the shortest possible period of time.

Even if you believe the information requested is not relevant--you haven't been able to solve the problem on your own and now you're asking for help and so to help we may ask questions. You may have already tried this or that--but if you don't tell us before we ask, or when we ask, how do we know what you've done, and more importantly what were the results of your troubleshooting?

The people responding here at control.com are very keen to help others, and if we get good information we are usually very successful. So, please, tell us about the problem you are experiencing; tell us about the equipment at your site; tell us what troubleshooting you've done and what the results of that troubleshooting were. And then we can help with more directed and targeted suggestions.

Looking forward to hearing about the problem you believe you are experiencing with the IGVs at your site--and what you've done to troubleshoot the problem, and what the results of your troubleshooting were.