Search results

Marina, I might also suggest downloading a copy of Woodward Manual 26260, 'Governing Fundamentals and Power Management.' There is some good information in there, some typographical errors, and some unqualified statements (especially in the "Droop" section). But I think you will find the...

Marina, Is your power plant operating as an island (independent of a larger grid), or is the power plant synchronized to a grid with other generators and their prime movers? Is the problem that the system is unstable when it separates from a grid and is running some plant or process...

I believe Neo lost interest in this discussion and wanted to talk about electro-hydraulic servo-valves. I admit I haven't finished writing that description, having made many edits and still looking for a way to "draw" some concepts because a picture "...is [still] worth a thousand words." If...

marc0s, When did the problem start, or, has it been ongoing since new? What exactly is the rating of the generator, from the generator nameplate? Amps? Power Factor? The formula for three-phase apparent power (VA) is: S = V * I * (3^(1.2)) * PF where S = apparent power (the total...

Hi, I can't tell from the manuals available for download from the Woodward site exactly which DSLC you have, and, as usual with Woodward manuals they are ambiguous. One area of the manual for the DSLC-2 says it can operate in droop or isochronous control, and then a few bullet points later it...

instrumentationautomation, GE have been mucking with water injection schemes and logic the past few years, so this is a general statement that you will have to investigate by examining the sequencing (Mark V) or application code (Mark VI or Mark VIe) running in the Speedtronic panel of the...

It would seem the issue is most likely of one of two possibilities, and may even be a combination of the two. First, that people operating the equalizing valve have been applying too much pressure/force when closing the valve. Second, the packing/seal was improperly installed and/or was of...

jack, Unfortunately a couple of the more specific questions you asked I'm not that familiar with as most of my experience is with GE-design heavy duty gas turbines and generators. While a lot of the basic principles of electric power generation are all the same--supply sufficient torque to a...

bkarim55, The density of air is also very closely related to its temperature--cooler air is more dense than warmer air. While I will agree that denser air requires more power to compress it, how do you explain the fact that--while humidity remains relatively constant--decreasing ambient...

Hmmmm.... I'm surprised the Friendly Moderator didn't point you to at least one other very similar thread about this topic on control.com. (There have been several, I think. Archived threads can be searched using the cleverly hidden 'Search' feature at the far right of the Menu bar at the top of...

lesswood, You're welcome; glad to be of help. Feedback signals on running heavy duty gas turbines are never rock-solid, as many people think they should be. There are all kinds of reasons for this, but they're just never rock-solid. (I'm speaking of analog values, like position feedback...

lesswood, I'm not familiar with the PSM LEC-III DLN combustion system, but in the GE system flow through the gas splitter valve is not proportional to stroke, so a method is used to convert flow percentage to the valve position that will result in the required flow percentage. Some control...

job2004, If these are rental equipments, then it would seem the supplier would be able to help with the connection--if I understand the question correctly (and I don't know if I do, because it's not really clear). Which may be why you haven't received an answer before now.

Thank you for the feedback! It's unusual for the LOCK folder to be "missing." And, it's unusual for CIMPLICITY not to automatically create the folder and populate it when the project is opened.

Sir, 1. The purpose of the APU is to cool and dry the air which is extracted from the axial compressor discharge. The only time this happens, though, is when there is flow through the APU--and that's only when the device(s) fed by the extraction line are in use. The most common usage for...

This problem usually occurs when someone is trying to copy files from a CD/DVD. Usually, when the files are written to disk they are locked, and when they are copied to the hard drive they are still locked. So you need to right-click on the file, click on 'Properties' and uncheck the 'Read-Only'...

It doesn't seem there's anyone currently responding to control.com posts with experience interfacing Matrikon OPC servers to Mark VI turbine control panels. You should contact Matrikon with questions about configuring/connecting their product to a Mark VI. They would have the best answer(s)...

abdi, Basically the two paragraphs (which are very poorly written, and appear to be taken from some revision of GE Publication GER-3620) say that water or steam injection reduces hot gas path parts life, but that the control system can be configured to reduce or minimize one of the areas of...

alirabieali, I believe Matrikon have specific instructions for using their produce with a GE Mark VI. Remember that the Mark VI communicates with GE HMIs over the UDH (Unit Data Highway) using EGD (Ethernet Global Database) for the <i>data and commands</i>. (Alarms and events are communicated...

otised, Thanks very much for the correction. I always have to--should--stop and think about heat rate. I don't have any correction curves to look at at the present moment, but that's a small excuse. Thanks, again. Do you have any clarification to offer about changes in air density as...