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sms, It would be necessary to see the one-line for your plant to try to understand what the exact configuration is and exactly how the GTs are connected to the bus(es). It's just not possible to say with any degree of certainty why the generator breakers opened on reverse power. I have no...

se_Iain, I presume by "powered off" you mean that the board was "dead"--no LEDs were lit or flashing, yet the switch in the <PD> core was in the ON position, AND that the fuse(s) for <Y> were good. If so, then it's still a good idea to try cycling the power to <Y> to see if it re-starts and...

A few years ago I had access to a Mark VIe simulator, and I was able to determine that when a third exhaust T/C failed (low!) that a trip was initiated. (And it should be said that the combustion monitor which uses the exhaust T/Cs is virtually the same for almost every version of digital Mark*...

Khoriwal000, >While calculating FSR at any point of time, you have always >considered (TNR-TNH)% to be droop value i.e.4%. The droop characteristic, or droop regulation, or droop setpoint, is a number that is chosen based on many criteria, usually how quickly the prime mover can respond...

Khoriwal000, Can you not use the 'Search' feature of control.com? This topic has been covered tens of times before, with the answer to your first question. 4% droop means that when the speed reference is at 104%--meaning the speed error is 4% (when the grid frequency is at 100%)--the...

khoriwal000, Doubt is not the right word; you want clarification and explanation of FSR. To doubt is to question the truth or fact of something. There can be no question about the truth or fact of FSR. There might be some explanation required in order to clarify one's understanding of the...

The turbine is a MS6001, a GE-design Frame <b>6</b> heavy duty gas turbine. It has a Mark <b>VI</b> turbine control system. csgv - Calibrated IGV LVDT Position Feedback csrgv - IGV Position Reference fsgr - Stop/Ratio Valve LVDT Feedback fsg - Gas Control Valve LVDT Position Feedback...

Isulamu, I don't have access to any CSP or application code at this writing, but in my experience about halfway through the production of the Mark V turbine control panels the acceleration reference after warm-up was changed to use TNHAR instead of TNHA, and FSRACC was used as the controlling...

Isulamu, As I prefaced my first reply to this post, later Mark Vs, Mark VI and VIe turbine control panels used acceleration rate for acceleration after warm-up was complete, comparing TNHAR to TNHA. Early Mark V turbine control panels operated as you described--the acceleration was...

Isulamu, What version of Mark* turbine control system are you referring to?

Chemsouhd, In later Mark V turbine control panels, and all Mark VI and -VIe turbine control panels, FSRACC, FSRN & FSRT all have a reference other than fuel valve position (and I'm referring primarily to natural gas fuel). For FSRACC the reference is acceleration rate, TNHAR. So, when the...

JMarkV, Thank you very much for the feedback!

SECOND12345, NEWSFLASH: Every GE-design Frame 9E heavy duty gas turbine-generator is not like every other GE-design Frame 9E heavy duty gas turbine-generator. What sets them apart from each other? Auxiliaries, including the type of starting means and cooldown mechanism (slow roll; turning...

Chemsouhd, Thank you for the information. I, too, believe that an orderly shutdown and power-up of the processors is important, and without that it seems that some version of UCSB is susceptible to loss of memory.

mccubb1960, Can you tell us what equipment this document is for?

MSF, #1- The LVDT is used as an "outer loop" to the pressure loop. When the actual P2 pressure is equal to the P2 pressure reference, the output of the regulator summing junction is zero (because the two are subtracted from each other). If the actual P2 pressure deviates from the P2 pressure...

MSF, First of all, the GCV should NEVER get 100% open under normal operating conditions (with proper gas fuel supply and P2 pressure, and with gas that meets the BTU content used for choosing the fuel valve internals (plugs and seats) and fuel nozzles (orifices)). The turbine designers choose...

abdulaziz, Thanks for writing back with the answers. Unless the Mark VI has changed significantly (and it might have, but it's doubtful) if the turbine control system has TCAT cards it is a Mark VI<b>e</b>. As for Process Alarms, <b>WOW!!!</b> 'Fuel Gas Pressure High' AND 'P2 Pressure...

esdqap18, Are you getting a full "rip-and-replace" Mark VIe upgrade, or the Mark V-to-Mark VIe "Life Extension" upgrade? There is a HUGE difference. In the former, you would have to remove the Mark V, by disconnecting all of the wires, and replace it with a new Mark VIe. This takes longer...

Abdulaziz, What kind of control system? What Process Alarms are being annunciated when the unit is failing to transfer out of Primary combustion mode (which appears to be what you are saying; please confirm the unit is not transferring from Primary to Lean-Lean, and is not transferring...