5MW XFR on 115KV
5MW XFR on 115KV
(OP)
Hi, All:
I am getting involved in a new project, for a Gas Processing Plant. The entire Plant needs 4,7 MW to operate, and according the visualization studies, this power will be supplied by two 115/13.8 KV transformers in redundant double bar (two 115 KV incoming lines).
My questions:
1.- Is it practical to feed the plant in 115 KV?
2.- Are there Electrical Factories that manufacture 115KV transformer with that capacity (5MW)??
Thanks in advance
I am getting involved in a new project, for a Gas Processing Plant. The entire Plant needs 4,7 MW to operate, and according the visualization studies, this power will be supplied by two 115/13.8 KV transformers in redundant double bar (two 115 KV incoming lines).
My questions:
1.- Is it practical to feed the plant in 115 KV?
2.- Are there Electrical Factories that manufacture 115KV transformer with that capacity (5MW)??
Thanks in advance






RE: 5MW XFR on 115KV
2. Yes. It's on the small side for a 115 kV winding, but you should not have any problems finding a supplier.
RE: 5MW XFR on 115KV
RE: 5MW XFR on 115KV
According to some economic evaluation ( in our area, with our prices),decition between MV and HV is about 25-28MW.
Regards.
Slava
RE: 5MW XFR on 115KV
Are you at the stage of load flow and motor starting studies or just conceptual stage? If the latter I would be estimating the transformers a little larger, just to account for the things you omitted to factor in: planning for 94% loading is unreasonable and will be a real headache later if you find you need a bit more capacity, especially with what is likely to be a pretty expensive transformer.
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RE: 5MW XFR on 115KV
Feeding at 115kV is not a problem. Buy a transformer 10 MVA or larger. The cost difference between 7.5 & 10 MVA is probably smaller than expected at that voltage. At 10 MVA you are still within the ratings of typical 13.8 kV equipment (FLA = 420 Amps) so the cost of the low voltage equipment will not increase.
RE: 5MW XFR on 115KV
dpc, Zogzog, slavag: I have to find prices of 115 KV equipment (is very close to the Plant, 300 mts). And I have to evaluate the construction of a 13.8 KV, 5 Kms line to the Plant. But really, i think the 115 KV is the expensive option.
ScottyUK, rcwilson: the conceptual stage is finished. We will start Basic Engineering the next week. Some of the work is done. According conceptual engineering, there will be two incoming lines with 2 XRF´s (5 MW each, total 10MW) for normal operation.
Looks like cost engineers will have a lot of work to do. Specially now, with a world financial crisis. All prices are expected to rise.
Thanks to all
RE: 5MW XFR on 115KV
Economic considerations are your main concern with supplying at 115kV.