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qhogan1, Password protection is not closed architecture or black box. It's possible your site has the "EPIC" code from GE that prevented site personnel from making any changes to code. GE sold that as an enhancement to prevent people from "inadvertently" making improper changes, but it was...

When did this Diagnostic Alarm pop up? After a maintenance outage? After a trip from load? After "calibrating" the ASV? Suicides are usually configured in ToolboxST, under the Regulator tab. There can be a lot of "nested" options which have to be expanded to find the option you're looking...

Ken, Thanks very much for this--and for keeping us apprised of the threat!

qhogan1, This topic comes up rather frequently on control.com. I want to preface my remarks with this statement: The "closed," "black box" myths about the GE Mark* operating software is a lot of hooey. It's just different from what most people are accustomed to, but it's not closed (unless...

Power factor is a number between 0 and 1; it is never greater than one. (A power factor of 1.0 is also called "unity power factor.") Power factor can be leading or lagging. At the generator, a lagging power factor means the generator is "producing" reactive power and supplying it to the load...

Igvmax, The answer lies in F:\CONFIG.DAT. You need to edit as appropriate, the lines in Section 2 <b>AND</b> Section 3 (the ones without the semicolons at the beginning of the line that have the information you need to...

Nick, I have heard of plants located a long distance from a grid on a certain type of connection (can't recall the type) experiencing problems with unstable frequency, but not like this. This seems odd. How far away is your plant from the main grid? Is it a single connection to the grid? How...

Nick, Sorry for jumping in to this part of the thread, govyman, but I, personally, have never seen this kind of logic. I don't think you have ever posted what the reduction gear box nameplate lists for input- and output speeds. Specifically, what is the input speed for a 1500 RPM output...

Yes, if GE used the same documentation procedures for their industrial gas turbines as they do for their military gas turbines everything would be a LOT better for everyone. BUT, the difference is that the governments pay for documentation. In fact I've been told that when the government is...

Nick, If you are seeing these kinds of spikes and frequency changes using a PQM (Power Quality Meter) and Multilin relay, then I would have to say the grid is NOT as very very stable as you would like to believe. Either that or there's something not right with the metering PTs and CTs and/or...

ChristensonWJ, I am NOT any kind of steam turbine expert. That's partially by "design" (I have tried to avoid them as much as possible, preferring to work on gas turbines--for many reasons), and partially because up until a couple of decades ago they literally broke the mold every time they...

Nick, When did this problem start? (In other words, had the unit been running without problems for some time and then this problem started? Or are you trying to commission the unit (turbine control system, including synchronizer) and trying to tune the unit during synchronization?)...

surya, For a machine of that vintage (age) with conventional combustors and operating in simple cycle mode the IGVs will remain closed as the unit is loaded from generator breaker closure until the exhaust temperature (TTXM) reaches either 700 deg F or 900 deg F (I can't recall which, but I...

surya, Also, does the turbine you look for exhaust to atmosphere (simple cycle), or into an HRSG (Heat Recovery Steam Generator; a boiler to produce steam for a steam turbine and/or nearby process; combined cycle)? The IGVs can be used for MANY things, and their use depends on the type of...

surya, >The GT that I look for shows high turbine exhaust >temperature of about 1100 deg F even in part load (ambient >temp of 80-90 deg F), with the brochure indicating exhaust >temperature of just 700-800 deg F (iso). What kind of combustion system does the GT you look for have...

It's atypical for a machine with DLN-I combustors to have only a single CPD transmitter since CPD is SO critical to DLN control and protection. But, if Unit 2 has three CPD transmitters what are the three pre-voted values of CPD? It's entirely possible that one or two of the three CPD...

There is no doubt the pressure drop is real; it's the cause that is in doubt. I'm not familiar with "latched solid-state relays;" I will have to do some investigating on those. Can you provide a manufacturer's name and model number? In my personal opinion based on my personal experience...

khoriwal000, Unit 1 is operating at 25 MW; Unit 2 is operating at 19 MW. Both Units have the same IGV angle, and both Units have roughly the same CPD though the inlet filter differential pressure is higher on Unit 2. You DIDN'T say what the FSR was for each machine, OR what fuel was being...

Good day, >If there is a fault on the grid that makes the voltage decay >significantly, are the AVRs capable to change immediately >from taking in to generating reactive power? Only a proper power system study (which takes a long time and a lot of money) can answer this question. ABB...

Nick, What happens when a synchronous generator is synchronized to a (very very) stable grid is that it's speed immediately changes to the generator's synchronous speed--that is 1500 RPM for a 50 Hz grid. It can't slow down or speed up to anything more or less than 1500 RPM because the...