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Tharanath
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Join Date: May 2005
Posts: 1

Tharanath

02/20/2014 7:36 PM

I'm working for a Wartsila power plant with 14 Wartsila vasa 32 engines with 6.375 MW Abb generators. Recently I found our ABB Unitrol -1000 -15 AVRs do not share the reactive power and some of them even goes minus. I checked the communication path and It is Ok. Does anyone know the reason for this? Your help is Highly appriciated.

Thara
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tcmtech
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Join Date: Jun 2009
Location: South of Minot North Dakota
Posts: 8376
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#1

Re: Tharanath

02/20/2014 7:52 PM

I suspect you need to get a number of us tours first so we can see this problem first hand for ourselves.

Please!

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SolarEagle
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Join Date: Mar 2007
Location: by the beach in Florida
Posts: 33392
Good Answers: 1817
#2

Re: Tharanath

02/20/2014 8:41 PM

I would troubleshoot the avr's...is it always the same one(s)?....the excitation voltage should be throttling to correct this....

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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
#3

Re: Tharanath

02/20/2014 8:56 PM

Note to self:

Don't buy a Wartsila DG set. After sales aren't very helpful.

ABB have always been great to deal with. I would think with 14 sets they would be more than willing to help.

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RAMConsult
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Engineering Fields - Power Engineering - New Member

Join Date: May 2007
Location: NYC metropolitan area.
Posts: 3230
Good Answers: 444
#4

Re: Tharanath

02/20/2014 9:52 PM

A few things to check:

AVR Droop settings are all the same,

Cross-current compensation settings are enabled and all the same,

CT ratios are all the same,

AVR settings are consistent across all machines,

All machines are set to AVR.

When operating identical machines on a common bus it is important that every setting be consistent across the entire group.

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jack of all trades
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New Zealand - Member - Kiwi Popular Science - Weaponology - New Member Engineering Fields - Power Engineering - New Member Engineering Fields - Electrical Engineering - New Member

Join Date: Sep 2006
Location: Auckland, New Zealand
Posts: 8777
Good Answers: 376
#5

Re: Tharanath

02/20/2014 10:26 PM

Is this a new problem or was the system not set up properly to begin with?

Answering this question may help narrow down the possible causes.

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PWSlack
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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.
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#6

Re: Tharanath

02/21/2014 5:14 AM

How did the phone call with ABB's Technical Helpline go, please?

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jack of all trades (1); PWSlack (1); RAMConsult (1); SolarEagle (1); tcmtech (1); TonyS (1)

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