Recent content by CSA

Hannan900, They are all probably equally adequate for overspeed detection and protection. They can all probably be powered from available power source(s) at your site. They all probably have different options and features, some of which may be useful at your site and many of which may not be...

jeff3030, GE has become really fragmented in recent years; there are different divisions of GE that are selling and configuring Mark VIe turbine control systems differently (wonderful, right?!?!). If you had a Mark V then it's likely you have one of the Mark V-to-Mark VIe "Migration" or Life...

jeff3300, Difficult to say with any degree of certainty without being able to see the application code running in the Mark VIe to see if there is any special or unique code. And there's a LOT of that going around (special, unique code) these days. Generally, though, when dead bus breaker...

PowerGeneration, I can only answer this question specifically for GE-design heavy duty gas turbines and generally for other gas turbines that use exhaust gas temperature sensors to monitor for combustion problems. Fuel nozzle inspections are warranted when there are higher than normal exhaust...

Also, what are the IGVs doing when the load swings are occurring?

Since Pre-Selected Load Control uses feedback from a load (MW) transducer, it's possible the load transducer, or one of its inputs (potential transformer; current transformer) is failing or having a problem. It would require a shutdown and a person or persons with some sophisticated test...

MartinFO, Hmmm.... I'm not sure I really understand the set-up or the need to control the speed. And I'm really not familiar with trying to measure speed with a reed switch and magnets. But I think you need more pulses in a shorter period of time than you are getting, especially if you want...

luiss, To Continue (due to the 10000 character limit imposed by control.com)... You say the SRV is fluctuating. What is the GCV doing when the SRV is fluctuating? Is it also moving? Do you always used Pre-Selected Load Control to operate the turbine to maintain a particular load? There is a...

luiss, I'm going to presume the turbine-generator is older and previously had a earlier Mark* turbine control system and was upgraded to a Mark VIe. I interpret your statement about "... operating with a reduced load of 4 MW for a long period of time (more then one year). ..." to mean the unit...

dax2172, I know the operators and their supervisors and the instrument department personnel will ALL cringe and be shocked at the suggestion of running the unit without Pre-Selected Load Control active because they are just all CERTAIN that the unit will drift to any load and be "out of...

dax2172, Can you please provide better data on both the TNR and TNH variations? What happens when you click on RAISE SPD/LOAD or LOWER SPD/LOAD (which disables Pre-Selected Load Control but would not results in excessive load swings!)? Disabling Pre-Selected Load Control should result in a...

gtengineer, If there is humidity condensing on the Reuter-Stokes Flame Trakker lenses, the problem is most likely that the cooling water flow to the sensors is not being properly regulated. There are supposed to be needle valves in the cooling water discharge tubing which are to be adjusted to...

farhan317, The ability to "private message" people on this forum is a mixed blessing. The really GREAT thing about these kinds of forums is that MANY people can benefit from the questions and answers of one person over many years. It's a very unselfish thing to participate in these open...

farhan317, Usually, there is one (1) starting means for a gas turbine. (A starting means can be an asychronous (induction) motor, an expander turbine, a diesel engine, a hydraulic starter, a pneumatic starter, even a synchronous motor (one temporarily converted from a synchronous generator for...

Sounds like a school science project. Because you haven't stated what the power of the gas turbine asynchronous starting motor (also normally called an induction motor by people in the industry, and an asynchronous motor by people in school) requires. You need to know that, and you need to...