Design Parameter for 33kV Overhead Line

[boshnaq84]

Im doing a self study kind of project to try to educate my self with Power distribution as im a Communications Electrical Engineer and not a Power Electrical Engineer.

I have 2*150MVA 220/33KV transformers, these transformers will be feeding 165*230KW Water pumps using 165*300KVA 33/0.4KV pole mounted transformers in a piece of land 40*10Km. The total length of the ring circuit will be 160Km long.

what kind of parameters should I take into consideration? like voltage drop, total load , etc..

 

[desrod]

Start by the high level design targets:

Performance criteria: do you need a radial or looped network?

Can you influence the 220/33 kV sub location? This will have an impact on voltage drop, currents etc.

Protection philosophy: fuse burning or fuse saving?

Then build yourself a digital model, then run load flow, voltage drop, short-circuit, motor starting, cold load pickup analysis.

Optimize your design considering losses, reliability and future load increase.

Have fun!

Desrod

 

[boshnaq84]

Thank you for your reply.

I guess there is a lot I need to learn. is there a good book that you would recommend where I can read up on those parameters? also what kind of software would be able to emulate this kind of model?

 

[desrod]

Books on "Distribution Power System Planning" should be great. I have been in the business too long to know what is available at the moment.
You should be able to find something on the web.

There are a number of software available: CYMDIST, SKM, ETAP, EasyPower, Milsoft.

Some of them have free limited time demo. Plan your network, find your equipment data and then get a demo copy and run your simulations.
You will then be able to run multiple configurations and check resulting overall performances.

Desrod

 

[boshnaq84]

Thanks Desrod
i have already started looking for some books and will decide to buy after I review them and get a better idea of what I want to spend my money on

 

[jghrist]

From the voltage, I assume that you are not in North America. Be aware that there are huge differences in distribution design between North America and the rest of the world. There are very good guides on the internet for North American distribution system design (start with

http://www.usda.gov/rus/)

but these may only confuse things when working with European systems.