Transformer Parameters

Looks like teach wants you to try various values as an exercise to see what works best for the budget ($100 million).

You will not learn much if CR4 does the work.

hii, it is my research work, not assigned by teacher. just want to make sure I assume sensible practical values

For a new transformer worth $100 million for a substation,

You mention no transformer parameters, supplier and/or model number, not even the MVA size and primary and secondary voltage!

I know of no substation-sized transformer worth $100 million (USD?). A complete substation yes, but not a single transformer.

parameters?

None are provided for us to even try and work with (substations and substation transformers vary greatly in size and construction). Please provide much, much more information, including what exactly you are trying to research. Reading your post again it really does look like you don't have enough information yet to ask the question.

Thank you;

How about a typical 500/230 kV transformer? (in CAD)

Are any more parameters necessary? (assuming typical supplier/model & primary)

Thanks,

Tims

For this fairly specific transformer size and voltage I would only be guessing (which is not that helpful for a research project).

Someone else here may be able to help you, but there is really no true average figure as transformer transport costs play a large part in overall cost of purchase and repair. Transformer unloaded energy costs are ok as these will generally be a percentage of the total transformer size.

Well, at least a near simplified estimate of $ 1.5 million - would this make sense?

What nominal capacity would this 500/230 kV transformer have? (10^5 kW?)

I am working on an academic research project in mathematical modeling, so near estimates would be of great help.

Thanks a lot,

Tims

Maybe its a California transformer. After all of the political, bureaucratic, environmental, and other misc kickbacks are factored into the cost a $100,000 transformer becomes a $100,000,000 transformer by the time the customer gets it.

Tim

I would suggest you contact your local power Co and ask for some assistance. You could contact some of the major transformer Mfgs and get estimates. Where are you located?

I am in Canada

Randomly surfed through the net, looks like 500/230 kV transformer

costs CAD 16.7 million.

Now, I am searching for the normal capacity of this transformer.

Guess it is between 70 - 100 MW

$100 million is a whale of a transformer, especially in today's market.

• A 138/13.8 kV, 15/20/25/28 MVA, 60Hz unit with LTC, purchased new in 2008, cost US$800K.
• A 138/69 kV 83/93 MVA autotransformer, purchased new in 2000, cost US$2.5 million.

I'd say you're looking at several hundred MVA, EHV (500kV+) on both sides.

Thanks pwr2thepeople,

How much would a 500/230 kV transformer cost? On the net, it seems to be around

US 16.2 million. Is this sensible?

How much time typically it would take to repair a major problem in this transformer?

Thanks,

Tims

hi Tim,

for your reference (took from 2009 figure), estimated price for :

- 300 MVA autotransformer ; 275kV --> US$ 1.8M

- 350 MVA GSUT ; 220/500kV ; made in 3 single phase Tx --> US$ 3.1M/single phase Tx

for 16.2 MUSD, it is for sure too much for a 500kV Tx.

Rgrds

dj46,

quick question, the XFMR cost data you posted (from 2009 figure), what refence material is it from? RS Means? I'm looking into a reference book so i can estimate project cost for 34.5 kV and above.

Thanks in advance.

hi Maspwre,

figure of 2009 was the offer price, it was based on some international price reference such as LME, GOSS, Nymex (for oil), etc.