Can a Generator Excitation System Have No Saturation?-IEEE AC5A Excitation Model

Can the Pope poop in the woods?

Technically its possible!

H0ly sh1t!

Its an Engineering Forum so if we start discussing biological functions in the electrical section I will add no resistance to my answer!

You make me laugh. GA

Yes it does, what doesn't make sense to you? It usually means that the maximum operating point of the generator is purposely kept low so as to stay in the linear region and not push the laminations into saturation. For more info on Doubly Fed Induction Generators (DFIG) check these out:

http://www.labvolt.com/downloads/download/86376_F0.pdf

and

http://en.wikipedia.org/wiki/Doubly_fed_electric_machine

Hi,

First of all its good to see a bunch of engineers have some sense of humor :)

Now back to tech stuff: I am asking because I am doing simulations with DigSILENT and for the excitation model I am using, if I place SE1 and SE2 as zero (which happens when there is no saturation and we see a straight line there) the simulation doesnt run (a denominator value is zero and then I get the biggest error ever). This model was made in a way that having a generator without saturation characteristics doesnt make sense.

By the way, the saturation models can be found in the IEEE document "Recommended Practice for Excitation System Models For Power System Stability Studies ", and the calculation of SE1 and SE2 can be found in Annex C in case you dont know what I mean here.

Now, I know I can work it in the non saturation part, but that wasnt my question now, was it?

Let me know what you guys think, and no pooping around this time!

;)

Freddy

As Ram already answered, the saturation exists but is outside the operating range.

Try to set your simulation parameters the same way, outside the operation range or reduce the saturation to the minimum acceptable for the simulation.

Good luck