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Frank, since you indicated this began after an outage I would suggest that something may have not been assembled correctly or was damaged. I am making a lot of assumptions in my response. There have been several variations of the CDMS probes and configuration through the years. I am assuming...

Hi Makster, please standby as I will take a little time to formulate a response.

You will need to search your logic for signals like L83JD1-9. These signals will typically be connected to an array that selected different rates of change for TNR. You will need to find your digital inputs for the governor raise/lower, then follow them to find which L83JD signal they are...

Mike, Unfortunately as CSA has already indicated you need to provide a lot more information if you have any expectation of getting assistance. I hope for your sake this is a GE control system since there is lots of knowledge on this forum related to the MARK system and GE exciters. If this...

1. what is the signal name of Droop speed which is equal 4%? The control constant is typically DWKDG that is used for the macro CON_SET_DRP. This constant scales the droop response according to the ISO rating of your turbine in its location. Turbine Iso Rating/Droop number(usually 4 or...

Dear Makster, I have spent hours looking at your logic, trends, logic, trends. Changing time scale, zooming in, zooming out, thinking, thinking and trying to put together a response that doesn't ramble on, but is appropriate. I start this near the end of my work day, and will need come...

Dear Makster, I have not forgotten about this post and want to comment more and share what I can about the different droop logic. But work here has gotten very busy. I will get back to this--just need a little time to catch up.

Dear Makster, thank you for sharing the data. I was able to retrieve the .m6b files for each unit and the Triplog files for the event. Based on the Triplog data I make these statements which I believe to be true for the event. Both units accepted load when turbine speed and system frequency...

Dear Novice, It is helpful when you start a new thread rather than continue a thread from several years ago that may or may not be the same type of unit that you are working with. I assume this is a DLN1 combustion system independent valve configuration running on a GE Frame 7 or GE Frame...

Good morning Makster, I understand being swamped so no worries. I was able to locate the .m6b files for both units and will start reviewing them when time allows. I did not see the Triplog files there yet so maybe you are still moving them. I will check back later to see. I will work on this...

Makster, Sorry but I was away at a customer site for the past 2 days. CSA was kind enough to help out. I do not recall from any of your posts if your units are controlled by a MKVI or a MKVIe. If you want to share your logic in some way, either the .m6b file if a MKVI control, or an...

Makster, based on the info provided this is what I understand so far. 1) We have a logic configured on our Power Plant DCS that whenever Fuel Gas Compressor of a GT trips, DCS issues a command to Mark-VI to trip the relevant GT which appears as customer trip. In this case, when both GTs...

Dear Makster, I was able to download the TripLogLive file for GT#2 at the time of the event. Based on what I see from the trend so far GT#2 was not in Isoch mode. I see the machine pickup ~2 mw of load at 13:45:41, frequency at that time was 49.6hz. Frequency continued to decline and the...

Hi Makster, I would prefer the .dcaST files if you can find an easy way to share them. I will be glad to look at them and comment. If the capture blocks were properly configured and produce data at the millisecond level we should be able to see better what occurred and at least discuss it...

Dear Makster, Very nice job in providing details of your plant and the event. It makes it so much easier to comment. I am not going to be able to give you a definite answer, but only some ideas and comments. Before the event your plant load was around 55 megawatts. It is assumed GT's #1...

The purpose of the vent pipe on bearing number 2 of the GE Frame 9E Gas Turbine is to supply pressurized sealing air from either the 11th stage or 5th stage of the compressor to the #2 bearing area. It also provides a path for piping to provide vacuum from the mist eliminator to the #2 bearing...

Is your unit equipped with Inlet Bleed Heat, and if so is it working properly? Are the IGVs operating as designed and following reference? If CPR is higher than desired it sounds like devices designed to control airflow through the compressor, IBH, IGV's or compressor bleed valves, are not...

Zasher, Windows 8.1 is not a supported operating system for the Toolbox software. For this particular version I believe WinXP and Windows 7 are supported. I have also had success installing it on Server 2008R2. I use virtual machine software (VMware) for all my installations. You can install...

We recently upgraded from MKVI to MKVIe. Our original HMI's were Windows 2000. We have an Ovation DCS system that relies on GSM communication from one of the GE HMIs in the control room. I do not know or did I pay attention to what exact version of GSM was operating on the old HMIs. I can say...

In my experience with GE Frame 7 series of heavy duty gas turbines thermocouple wires for bearing metal temperatures pass through a compression style of fitting produced by the manufacturer Conax. See the link...