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krigl, My response is going to be very simple, but is nonetheless probably one of the most important considerations. Running a synchronous generator at high terminal voltages (relative to a nominal bus voltage) requires lots of field current. This produces excess heat and expansion in the...

John, > What is the difference between Workstation and Toolbox in MarkVIe? Workstation<b>ST</b> is the application which runs on a GE HMI which allows CIMPLICITY to get data and values from and send commands to a MarkVIe turbine control panel. It is, in effect, a MS-Windows service that...

MakBan, When the excitation being applied to the generator rotor is not sufficient to "match" the grid voltage the generator is said to be under-excited. And when the generator is under-exciter the power factor at the generator terminals will be leading. This is kind of a dangerous condition...

There's no Guinness in the part of the world where I am at this time.

dinster, Long time no write. >Out of curiosity, can Reverse Power occur in a: > >- 2 or more GTGs running in Island Mode? Yes. >- Single GTG trying to de-couple from Grid to Island Mode? Not likely, where would the reverse power come from?

krigl, The term "grid failure" is extremely vague. That could be one of several reasons why you haven't had a response. It might help to remember that generators are devices for converting torque (mechanical) into amperes (electrical)--just as electric motors are devices for converting...

rudillus, Have a read of this thread: http://www.control.com/thread/1263147060 It should help your understanding. As the unit is loading the exhaust temperature reference, TTRX, will be equal to TTKn_I, the isothermal temperature--until CPD increases and reaches TTKn_C, then TTRX...

MakBan, It's very interesting that you report that the generator voltage is stable--yet the excitation voltage, current and "balance meter" (I presume you are referring to the transfer voltmeter that shows the setpoint difference between auto and manual regulator) are not stable. When the...

kk1989, Try this: http://articles.compressionjobs.com/articles/oilfield-101/167-steam-turbines-control-back-pressure-condensing?start=5 It was found by typing: "gland seal" (with the double quotes) into the Search field of an Internet search engine.

rudillus, Do the units have DLN combustors? Part Load does not use a curve. Load is controlled using Droop speed control. If the units do not DLN combustors but do have IGV Exhaust Temperature Control (sometimes called Combined Cycle mode) and its enabled and active, then the IGVs are...

skchp, Do you expect that the gas turbine control system or the DCS would act to maintain net power in the case of axial compressor or gas turbine fouling? If so, how do think it would do so? I ask because I'm interested to learn how other perceive these kinds of situations and what...

I wish to caution anyone responding to this thread the original poster has posted many times for help with DLN-I issues and has received many responses, to which we always learn of additional issues which indicate the unit(s) are being operated very harshly, bordering on abuse. It's not clear...

pikachoo99, for all intents and purposes, they will all see the same decrease in speed--they are synchronized. The differences will be in the rate of change, and that is machine-specific. But, the way they will respond will be different--even if they all are the same turbine, same governor...

abdi, No. Get someone to site to help with the issues.

floyd699, One needs to remember that a generator has to be driven by a prime mover, so it's really a generator-set, or a diesel-generator or a turbine-generator, or similar. Prime movers have governors (control systems), and they are usually separate from the generator exciter regulator...

They're gonna fight--and it will be ugly. If you believe every governor is exactly identical and the actuator strokes are identical and the hydraulic flow-rates are identical and the steam flows are identical and the boiler combustion controls are identical and the condenser vacuums are...

msalem73, I <i>guess</i> this means everything is working as it should now?? It's not really clear what you did to resolve the problem, but if it's working that's good news.

bil07, Thank YOU for the feedback!

RenegadeGas, Not an easy subject for me. The North American-based OEM seem to have <b><i>had</b></i> a policy that precludes hiring/promoting people who don't have a four-year college degree in the turbine business. There are now people in positions of management who have decided that they...

What happens when you exchange the wiring at the monitor with that of another sensor--to see if the problem is the monitor/card? Who manufacturers the sensors/monitor used at your site? Most of the sensors are extremely sensitive to dirt and oil--even from human hands. So, great care must...