Search results

mhs100, If memory serves correctly, the process is explained in the CIMPLICITY CIMVIEW Help feature.

Just as a kind reminder to Sam: "Droop Speed Control usually has pre-programmed ramp rates at which the fuel is actually increased or decreased and the PMS doing the frequency control doesn't take this into account. (Isoch Speed Control doesn't have this "lag"; because it's intended to...

James Murray, There's not a lot of air flowing through the compressor at part speed (not nearly as much as when at rated speed). High spreads during acceleration are <b>generally</b> a function of too little fuel during acceleration. This is especially true of liquid fuel start-ups (you...

mhs100, We don't know what version of Speedtronic turbine control panel you are working with, or what version of TCI and CIMBRIDGE or WorkstationST. I just had occasion to see a Mark VIe with a WorkstationST HMI running Win7 and CIMPLICITY 8.2 (PROFICY) and watched the operators...

DEARS, The more I re-read the posts to this thread, the more I am convinced there is some problem with the air flow through the axial compressor. Either the compressor bleed valves are NOT in the proper position, <b>OR</b> there is something wrong with the axial compressor (rotor and/or...

DEARS, CPD doesn't really increase very much until the axial compressor speed gets pretty close to rated (100%) and the IGVs are at minimum operating position (approximately 57 DGA (DeGrees Angle)) and the compressor bleed valves close. This is characteristic of axial compressors. So, if you...

DEARS, Are you absolutely 100% certain all the compressor bleed valves are closed?

Zihni, Thanks for the feedback!

Angel Albornoz, Are you operating all of the units as a "power island", independent of any grid or other units? Without being able to see how frequency is to be controlled at your site (the "islanding provision") it's impossible for us to say for sure how the units will be controlled and...

DEARS I try as hard as I can to understand the information that is provided, and sometimes I make a mistake. As in with the description of 2682 before bleed valves closed; I understood that to mean that the bleed valves had closed at 2682 RPM--which would be problematic. Apparently, that was...

Having never heard of a 'reductor' between a prime mover and a generator, I presume that it is a reduction gear which reduces the RPM of the turbine to a lower speed so the generator can be operated at synchronous speed while the prime mover is operated at it's optimal speed. Look, frequency...

PJeff, How is the turbine coupled to the generator?

ommer jumma, Thanks very much for the feedback!

omer jumma, >I think you will find that the actual >acceleration rate (TNHA) is exceeding >the acceleration rate reference (TNHA) >and FSR is being driven to FSRMIN when >warm-up is complete and that is causing >flame to be lost. That sentence should have read: I think you will...

Chandru, The firing pulses of rectifier bridges used for excitation systems in any kind of power plant are the same as firing pulses used for any kind of rectifier bridge used for any application. In my view, it's not possible for a human to control the firing pulse(s) to an excitation...

mohamad noruzi, I don't know that this could be called "isochronous load sharing" per se. It's just typical island mode operation, where one unit (the Isoch unit) is used to maintain frequency as load changes and the operators are responsible for making sure the Isoch unit can deal with any...

There are basically two types of cards used in Mark VI Speedtronic turbine control panels: VME cards (in the processor rack(s)), and terminal boards (cards) used for terminating field devices and instruments connected to the Mark VI. For the VME cards, usually the card version is on the...

Pramesh khan,<pre> VIB_IN1 bb1 39VS-1 (Brg. 1) VIB_IN2 bb2 39VS-2 (Brg. 1) VIB_IN3 bb3 39VS-3 (Brg. 2) Gas VIB_IN4 bb4 39VS-4 (Brg. 3) Turb. Group VIB_IN5 bb5 39VS-5 (Brg. 3) VIB_IN6 --- -----------------------------------------------...

omer jumma, Use the Trend Recorder the next time you start the machine and monitor the signals in the previous reply. I think you will find that the actual acceleration rate (TNHA) is exceeding the acceleration rate reference (TNHA) and FSR is being driven to FSRMIN when warm-up is complete...

nic & MWO, The problem comes in only when performing an Auto synch when the Speedtronic 100% speed scaling is incorrect. For example, if the load gear nameplate is 5106 and the Mark VI is configured for 5094, when the turbine reaches 5094 RPM the Mark VI thinks it's at 100.00% speed. The...