66 KV EHVT SUB STATION

[pjs]

We are designing the 66 kv EHVT out door substation, & we shall wellcome for any guidance / improvements of the same.
Can any one direct us for the lay out drawing of the 66kv 10 mVA EHVT substation, with protective relays desired, & incorporating the flash over protections , clearances et...

 

[SooryaShrestha]

Please put your question a bit clearer. First of all, what do you mean by EHVT? Is it extra high voltage transformer? If it is so, then 66 kV is not extra high voltage. It is only high voltage. I can send you the layouts, if you are in search of that only. But I think that will not serve all of your problems.
First of all you should have complete spec. of the substation equipment and ready for dispatch, which we call the electrical part. Then you need the data for all the lattice structure, which you can design and procure the angles or give data to the contractor to design and instal subject to the site conditions like wind loadings, siesmisity, ambient temperatures etc. This we call mechanical part.
Then you need design of Civil works like foundations for all structures.
Be careful, to prepare the data for grounding design, because this is the only part, nobody takes responsibility and in the end it comes under the head of the project manager. You need to have thorough design of the grounding before the shovel, pick or the bulldozer enters the site.
So layout is not a big deal in the substation construction.

 

[peterb]

It's not clear whether you are approaching this from the perspective of the Engineer or the Owner. In any case, if you are not experienced in the area of substation design, I strongly recommend that you find an experienced firm of Consulting Engineers, who will do a professional job for you. They can provide detailed design services as well as training for your personnel.
Another approach would be to develop the basic design criteria and then go out for bids on a turnkey design/build contract - there are many international firms with appropriate experience to handle such a job.

 

[jbartos]

Suggestion: Reference
1.Fink D.G., Beaty H.W., "Standard Handbook for Electrical Engineers," Section 17 "Substations", 14th Edition, McGraw-Hill, 2000
Reference 1 can be considered since it has included many suitable References.
Some substation equipment manufacturers have good support including software that you may need for sizing and verification electric parameters to interface the grid and provide suitable parameters for load. Also, there are industry standards covering substations in reasonably good details.

 

[GYakle]

I would agree with Peterb above in using a consultant here, a packager could be helpful in steel procurement and some design though I don't think they get to much into site specific design like ground grid, control house and general site layout. Additionally 69 kv is typically the a standard US.