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Infinite Generator

asked 2015-10-05 21:02:21 -0500

Lassettc gravatar image

I'm setting up a case representing an infinite generator. I assume modeling this dynamically is just as simple as having a large inertia and large damping coefficient for said generator?


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Thanks jconto, the damping and inertia coefficients should be large though correct?

Lassettc gravatar imageLassettc ( 2015-10-06 11:06:23 -0500 )edit

Yes, that is correct.

jconto gravatar imagejconto ( 2015-10-15 18:59:42 -0500 )edit

The damping factor shall be zero!!!!!

perolofl gravatar imageperolofl ( 2019-10-14 16:05:43 -0500 )edit

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answered 2015-10-06 09:26:07 -0500

jconto gravatar image

updated 2015-10-08 15:23:52 -0500

Use the classic model GENCLS, and no exciter,nor governor models. In the base case, give a large MVA to this machine and set its Xs = 0.01 or less.

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answered 2016-09-26 16:40:23 -0500

perolofl gravatar image

The short circuit power in MVA for the "infinite bus" is determined by Mbase/Zsorce. Select GENCLS with H=0 to make the generator infinitely heavy in the dynamics (infinite inertia and constant frequency)

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can you explain why the H should be zero please?? i thought with higher values of H , less movement of the frequency, thanks

marilyn3 gravatar imagemarilyn3 ( 2019-10-14 15:42:53 -0500 )edit

In GENCLS model, H=0 menas infinit inertia. It is explained in the model sheet for GENCLS. The frequency will be constant during the whole simulation, i.e. PU speed deviation =0.

perolofl gravatar imageperolofl ( 2019-10-14 16:03:23 -0500 )edit

thanks a lot!!

marilyn3 gravatar imagemarilyn3 ( 2019-10-14 16:10:59 -0500 )edit

answered 2015-10-15 06:31:50 -0500

Syed Mujtaba Hassan gravatar image

I have done same .. On tripping one of generator ... Initially, my infinite generator is picking up the load, however, later , that additional load is being distributed on all of remaining generators and infinite generator is going back at its initial load... whereas, I want to have that infinite generator to keep serving that deficit..

I wanted to attach the Pelectrical images for your reference.. however, website is denying by saying to "not have Karma>10"...

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What is the purpose of this Xsource = 0.01 ? What is the relation between the modeling Infinite Bus and the Xsorce parameter ?

martincho8002 gravatar imagemartincho8002 ( 2015-12-17 08:26:49 -0500 )edit no one else running into this problem?!?!?

faketiffanyhsu gravatar imagefaketiffanyhsu ( 2016-09-30 02:45:04 -0500 )edit

answered 2015-12-17 08:26:04 -0500

martincho8002 gravatar image

I decided to post in here because my question is relevant: "How do I model an infinite bus?" To be more exact, I need to model many infinite buses so "How do I model a number of infinite buses in a case?" I am asking in both load flow network data and dynamic model terms.

  1. What bus type do they need to be? Generator buses or Swing buses?
  2. Voltage schedules need to be set to 1, right?
  3. H (inertia) and D (damping) in Dynamic Data have to be 0, both of them ?
  4. No controls, no governors, no nothing?
  5. Generator model is GENCLS, right?
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Asked: 2015-10-05 21:02:21 -0500

Seen: 4,630 times

Last updated: Sep 26 '16