Previous in Forum: I2C Help   Next in Forum: Tensión mecánica de conductores
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
5 comments
Rate Comments: Nested
uttam
Participant

Join Date: Nov 2007
Posts: 1

Transformer Vector Group

11/08/2007 11:42 AM

500MW power station under erection. Generator Transformer comes in separate phase banks.

Problem:As per design the vector group is Yd11 but on site Yd5 has arrived.

The LV side delta is made by Generator Bus Duct connections.

Solution: 1) Change Bus Duct connection. ( Much delay in commissioning activities)

2) Modifications done in protection circuits of Generator,GT,UAT. to accommodate this change groups.

Question:

Is it possible ? I need some more details as to how things were done.

Thanks
Register to Reply
Pathfinder Tags: bus duct connection transformer vector group vector group change as per disign
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Anonymous Poster
#1

Re: Transformer Vector Group

11/11/2007 9:53 AM

Dear Uttam

Yes it is possible to do the same. But the design and setting of the same can be done in Numerical relay. Kindly send the detail or talk me on +919437209480

Thanx P.K.pattanaik
Register to Reply
Anonymous Poster
#2

Re: Transformer Vector Group

11/19/2007 8:03 AM

In new numerical differential relays, vector group modifications are done easily. Therefore they hadn't some problem with protection system.

In regard to different vector group step up transformers possibility, if there are not any interconnection path between two power generators via unit transformers and relevant auxiliary switchgears, it is not problem; because we can have two or more generators with asynchrony voltage system that are connected to common bus by different group transformers.

BEST REGARDS

MSJ

Creative thinking is enjoyable,Then think about your surrounding things and other thought products.
Register to Reply
Anonymous Poster
#3
In reply to #2

Re: Transformer Vector Group

12/28/2007 1:10 AM

I would really want to double check and make sure there is no interconnection of the generator transformers at any point - that would be my main concern. Other than that, if the protection relays are able to cater for the different vector group then you should be ok.

Steven
http://www.myelectrical.com
Register to Reply
Anonymous Poster
#4

Re: Transformer Vector Group

03/31/2009 5:46 AM

is it possible to connect ehv delta transmission line with ehv star transmission line at common bus bar in ring main system
Register to Reply
philipholderward
Participant

Join Date: Mar 2009
Posts: 1
#5
In reply to #4

Re: Transformer Vector Group

03/31/2009 9:22 AM

I think there will be problem with line and phase voltage.

transformer vector group

__________________
 Great thank to all engineers that make this world a better place to live!
Register to Reply
Register to Reply
Have a Different Question?
5 comments

Previous in Forum: I2C Help   Next in Forum: Tensión mecánica de conductores

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Electrical Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (60 right now)
Show Members
Advertisement