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Hamza Khan, Does either (or both) of the units at your site have the ability to burn diesel fuel? It would mean that the units have a Main Atomizing Air Compressor, a Booster Atomizing Air Compressor (for starting), a high-pressure liquid fuel pump, a liquid fuel pump clutch, a high-pressure...

Hamza Khan, Does either (or both) of the units at your site have the ability to burn diesel fuel? It would mean that the units have a Main Atomizing Air Compressor, a Booster Atomizing Air Compressor (for starting), a high-pressure liquid fuel pump, a liquid fuel pump clutch, a high-pressure...

JohanK, I don't have all the answers, and I have as much as said so for this and the other post I cited. I have answered to the best of my experience and knowledge; I am most familiar with GE-design heavy duty gas turbines, generators and auxiliaries and the GE Mark* line of turbine control...

Thank you for the feedback. "Feedback is the most important contribution!"(c) here at Control.com.

You are most welcome.

What does your Basler DECS manual say?

JohanK, You both seem to believe in similar philosophies of generator excitation control and regulation. Perhaps you can help each other come to some kind of mutual understanding. And, actually, there are four (4) questions in your original post to this thread. Droop speed control is, as was...

I&C_Power, I am not a steam turbine guru; not at all. I would suspect that the speed range(s) where wobbulation are required and used would definitely be a function of the critical speeds of a particular turbine. (In other words, it would most likely definitely depend on the critical speed(s)...

JohanK, Meet jtkarlsson. https://control.com/forums/threads/reactive-power-sharing-in-island-mide.50211/ You have a LOT in common. jtkarlsson has a LOT of experience with synchronous generators I'm sure he will be happy to share with you. He has a Basler DECS manual he quotes from, but...

No operational experience. You should try studying some of the manuals and white papers written by some of the AVR manufacturers you are considering to gain a better understanding of the equipment and how it is applied. Basler is a well-known manufacturer of excitation systems and AVRs, and...

jtkarlsson, Have you never seen the two diesel gen-sets you are referring to run in island mode supplying watts and VArs? Presuming the real load(s) are stable and the island is at rated frequency with two units synchronized together if one wants the island system voltage to be at rated, one...

With two control systems in strictly proportional control ("droop") neither control is really trying to control a particular voltage setpoint. The operator changes excitation to make the voltage equal to what is required/needed/nominal, and if the voltage drifts (because the reactive load...

It sounds like the unit has redundant turbine compartment cooling fans (hence, the change-over alarm) and because they are very important for helping to remove combustible gases from the turbine compartment the Mark* was programmed to shut the unit down if there is not one turbine compartment...

jtkarlsson, These are really good questions for the potential suppliers of the new AVR equipment. They know their equipment better than anyone else. In my experience, I have only seen exciters "fight" for control of bus voltage once--and that was when someone had misconnected the CT (Current...

jtkarlsson, While I have encountered exciter regulators with Droop (which is really just straight proportional control), I don't recall every encountering an exciter regulator with Isochronous control. My experience with reactive power-sharing during island operation of two or more...

Dayo, The mechanical personnel are ALWAYS going to say the problem is the automation. ALWAYS. Full stop. Period. It could be a loose connection. Have you checked terminations in EVERY junction box and sub-junction box of the related ratchet I/O? I'm trying to understand how VM2--which should...

Dayo, Without knowing what the pressures were BEFORE the problems started, it's very difficult to say if the pressures are good or not. Unfortunately, it seems some packagers use different pumps and different ratchet mechanisms which use different pressures. In my opinion, VM2 is a valve that...

Boa noite, Está bem? If you're the Customer, your understanding is what the contractor must adhere to. If you have other facilities that are configured as you indicate, then that's your Company's requirement. I have seen a very similar implementation for other power generators that are...

Personally, when I encounter a question like this on a running system (and we don't know much of ANYTHING about this safety system!!!) I see how it was handled with other similar inputs. I'm going to tap out of this thread. It's his site and if he's going to wait for a free World Wide Web forum...

Using redundant sensors for tripping purposes works best when one considers the predominant failure mode of the sensors and then choosing the signal which helps to prevent nuisance trips. Using pressure transmitters it can sometimes be difficult to assess the predominant failure mode (does it...