Search results

hadi, When the grid "cutout" occurs what are you wanting or expecting to happen? 1) Are you expecting the steam turbine generator breaker will remain closed and the Woodward 505 will automatically reduce steam flow into the steam turbine to maintain rated frequency to supply the "internal...

Lin Chong, You mention "... the four main and necessary conditions of paralleling the generator with the grid ..." Can you please list and describe these four main and necessary conditions? (I believe you have, but you didn't say 'Condition 1' and then 'Condition 2' and .... The original...

koeick, A gas turbine is a prime mover--a device (engine) that produces torque that is supplied to a driven device to do work (compress a fluid/gas or produce electricity). The driven device (compressor or generator) converts the torque provided by the prime mover. A driven device has its own...

cheedee, I have been (rightly) accused of being conservative when it comes to exhaust temperature control settings. They are not something to willy-nilly change to try affect some other change (such as power output). Having said that, most older designs of GE heavy duty gas turbines (and I'm...

jagriti, Methinks the GE-design Frame 5 heavy duty gas turbines at your site were not packaged by GE, probably by one of the several licensed Business Associates of GE (including, but not limited to BHEL, John Brown, and others). I say that because of the style of the drawings you provided...

If I could, and since this is a primarily controls/automation-related forum, there is a primarily generator-centered forum where you might get the information you are looking for. Some unusual things get discussed there, and some odd things get posted there in response to questions. There is a...

cheedee, So these "identical" turbines aren't even on the same site. I know (from painful personal experience) no one is every going to dissuade you from your mission of making two "identical" turbines produce the same electrical power. From a strange question to a (really) wild idea. Please...

Now, to switch to the Mark VI.... I've never actually done this before, and I'm not sure I would even try it myself. I was thinking it might be possible to export the Control Constant values to a comma-separated value (.csv) file, and then compare the files and reconcile any changes, and then...

cheedee, Are you calling me "old"??? (I guess I'm approaching that age, but I sure don't feel like it too much yet.) Or are you just saying I've been rode hard and put away wet (a reference to poor treatment of horses used in the Pony Express carrying mail across the USA in the 1800's)...

cheedee, Strange question, indeed. Yes; it's possible. Relatively easy for the Mark V, a little more difficult for the Mark IV. What formats are the replacement files in? I presume for the Mark V you have CONST_Q.SRC and CONST_B.SRC, (or CONST_C.CRC) files. The Mark VI would be a different...

sk1984, I think you would find (or will find if you do more research and ask more questions) that the OPC option is much better than the MODBUS option, and will be less painful in the long run. While I believe that both options require adding signals to the EGD in the Mark VIe to get them to...

JunHyeok, I'm not sure what ControlsGuy25 is trying to say, and I like what udshred said: "In other words if more than one generator set is to be run in isochronous mode( although not isochronous in the truest of sense), but still looks isochronous (LOL), there has to be some way of doing the...

MSF, Thank you for the full clarification. Now, the subject of this thread was regarding GE-design Frame 7F tripping on low gas fuel trip oil pressure. Your questions were about Frame 5s and failure to fire sequencing. In the future, if you have what is, or you feel or know to be a unique...

JunHyeok, Opinions are like ... Well, let's not go there, eh? All of the things you are referring to will likely have some effect on frequency deviation--the extent to which the frequency will vary during a disturbance, or when loaded. I see you are simply concentrating on steady-state...

And, sir, would you consider such an application to be "Isochronous Speed Control"? (I wouldn't as it involves a load signals being shared between engines along with other required logic and sequencing. True Droop Speed Control and Isochronous Speed Control relies on speed (frequency) for...

MSF, Thanks for the partial clarification. Now, is it a Mark V or a Mark V-to-Mark VIe upgrade?

JunHyeok, We're talking about AC (Alternating Current) power generation, right? When a unit (or two, in your theoretical case) is generating power, what is the speed setting? Because in all the machines I have worked on the speed setting is 100%. Sometimes, there is a small deadband or...

MSF If the unit has a ratchet, the ratchet is usually used to help the turbine shaft start turning if being started from zero speed. And, if the unit is "on ratchet" (COOLDOWN) when STARTed, the ratchet mechanism will usually start operating when the START command is accepted by the control...

MSF, It would be most helpful if you would specify which type of GE-design heavy duty gas turbine you are working on and what control system it uses. Not critical to the answer, but helpful. Most ALL GE-design heavy duty gas turbine control software I have seen remains in the Master Control...