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Vinodh
Associate

Join Date: Jul 2010
Posts: 32

Stability Test for Generator

02/10/2016 1:35 AM

Would anyone say what is the acceptance level/criteria for Stability Test?
actually we are performing this test to confirm CT connections are set right. In this case acceptance criteria is achieved if differential current value doesnt exceed pickup value?? if any other means to be considered please guide me. Thank you
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lyn
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Join Date: Oct 2008
Posts: 42355
Good Answers: 1693
#1

Re: Stability Test for Generator

02/10/2016 1:46 AM

Guidelines for Generator Stability Model Validation Testing ...
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Anonymous Poster #1
#2

Re: Stability Test for Generator

02/10/2016 3:10 AM

Turn it upside-down. If it turns itself back right-side-up, then it is stable. If not, then not.
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IQ
Guru

Join Date: Feb 2013
Posts: 2004
Good Answers: 31
#7
In reply to #2

Re: Stability Test for Generator

02/11/2016 11:45 AM

I anticipated that your comeback as; 'give it a shove, if it falls over it is not stable"
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RAMConsult
Guru
Engineering Fields - Power Engineering - New Member

Join Date: May 2007
Location: NYC metropolitan area.
Posts: 3230
Good Answers: 444
#3

Re: Stability Test for Generator

02/10/2016 11:19 AM

This seems like a very convoluted way to "...confirm CT connections...". Are you assuming that if the unit remains stable then the connections are correct, how do you measure "instability", and what does differential current have to do with stability? You do know that if the connections are incorrect the control/protective systems will not operate properly and you could damage the unit.

Do it the proper way, hire an engineer experienced in commissioning a unit to guide you.

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 “Tell me and I forget. Teach me and I remember. Involve me and I learn.” Ben Franklin.
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PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#4

Re: Stability Test for Generator

02/11/2016 4:56 AM

Anyone could say that it is pointless carrying out the test in the first place if the boundary between a successful outcome and an unsuccessful one were not determined beforehand!

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TonyS
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United Kingdom - Member - New Member

Join Date: Aug 2010
Location: Resting under the Major Oak
Posts: 4347
Good Answers: 181
#5
In reply to #4

Re: Stability Test for Generator

02/11/2016 6:58 AM

You've never worked in R&D then? (Wreck and Destroy.)

"Was it supposed to do that?"
"No, and I need an excuse, quick!"

I always blamed the boss.

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PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#6
In reply to #5

Re: Stability Test for Generator

02/11/2016 7:26 AM

Whatever.

__________________
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Anonymous Poster (1); IQ (1); lyn (1); PWSlack (2); RAMConsult (1); TonyS (1)

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