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Shavir, Can you share the link to the Woodward Governor Control document which was so helpful? I must have missed that one! Thanks!

This is a good example, with only two turbines of relatively equal capacity supplying an "island". I'm not exactly clear on the conditions at your plant, but if you will just read on you should be able to relate the explanation and examples to your situation. Imagine one tandem bicycle with...

Shahvir, Thanks for the help--and the kind words. I just try to remember how difficult it was for me to grasp some of these concepts back when I was reading the available literature (texts and reference material). However, I don't think we've helped surya. I keep re-reading his posts and I...

To Shahvir's point, grids are generally classified into two different types: finite and infinite. The description provided previously is most applicable to what's termed an infinite grid, a very large electrical transmission and distribution system with many generators and prime movers connected...

You say you have re-started the historian service many times to fix this problem. Do you mean you have had to do this many times in the past for a similar problem, or that you have tried re-starting the historian service many times in an attempt to fix this specific problem? When did this...

surya, Here's a link I had been looking for for some time. The frequency graph used to be "real-time" but it seems to be static now. https://www.entsoe.eu/index.php?id=108 There is yet another explanation of grid frequency, that may be of some help. You might try looking at this page...

surya, If you're riding your bicycle on a relatively flat and smooth road and you want to maintain a constant speed then you will apply a relatively constant torque to the pedals. If you increase the torque, then the speed of the bicycle will increase. If you decrease the torque, then the...

Stranger things have happened, but GE are not generally agreeable to using any other control system on their heavy duty gas turbines other than the Mark series of Speedtronic controls. GE Energy will probably use the Mark VIe Speedtronic turbine control system. But, on second thought...

A generator is a device for converting mechanical torque into amps. A motor is a device for converting amps into mechanical torque. Motors and generators are joined together using wires. So, in effect, one is just transmitting torque over wires using electricity as the medium. Same...

Sir, The speed of a prime mover which is directly coupled (even through a reduction gear) to a synchronous generator (alternator) and being operated in parallel with other alternators and their prime movers on a grid is, for all intents and purposes, under the control of the frequency of the...

Zahid Hussain, I will take exception to a couple of your statements. With regard to exhaust temperature being an indication of gas quality, I disagree. Exhaust temperatures will indicate whether or not more fuel is being burned in one area versus another (which will cause a higher temperature...

Hello, Most every CSP (Control Sequence Program), which is what you're looking at when you're using Mark V Studio, is composed of segments (because the Master Sequence Editor can't open a single file with all of the rungs and blocks needed to control and protect a turbine and its auxiliaries...

The opinions expressed here are my own and were formed from field experience. Any inaccuracies are also my own, and were also formed by field exposure to justifications and negotiations. Any slights are unintended. All truths are relative (and I have no relatives employed in any of the Companies...

IDOS doesn't use extra RAM like other operating systems do. It's basically limited to the base 640K, and because you're probably running IDOS on a machine with a BIOS that doesn't use the base 640K the same way that the BIOS that IDOS was written for used it, then it's probably not going to...

If these machines have DLN combustion systems, and they are being operated in off-frequency conditions, then all manner of odd things can be happening. 48.8 Hz is 97.6% of rated frequency, which means the unit was at 97.6% of rated speed. Which means the exhaust temperature was likely at or near...

Thank you for taking the time to respond to each and every point; this is most helpful. So, this is a new unit, with a Mark VI (not a Mark IV), and it has over a thousand hours of operation, most of it on low BTU gas fuel. (A thousand hours in a year-and-a-quarter is not a lot of hours, and...

There are, literally, hundreds of GE-design heavy duty gas turbines <b>in operation</b> around the world with Mark II control systems; there was a pretty large number of GE-design heavy duty gas turbines sold with Mark II control systems. There is currently no support from GE for Mark II...

Great question for the OEM/packager of the units at your plant, or perhaps Rochem (manufacturers/distributors of Fyrewash). What kinds of contaminants do you normally expect to wash out of the compressor and how would you expect them to react with the Fyrewash and demineralized water? What...

Do you have some questions about some other systems not mentioned in this thread? You really haven't given us much information to help you with. We don't know if you're building a new power plant, or modifying an existing one. Are you looking for a complete solution for a power plant, one...

ESKAY, Combustion monitoring is a complicated subject. It involves an algorithm BBL performing some sorting of exhaust T/C values and locations, and then performing comparisons of values and locations to determine if there is a problem. And some of the signals which are derived in the...