power transformer sizing
power transformer sizing
(OP)
Hi,
my question is what happens if a power transformer is loaded most of the time close to half its full capacity and only for a very short period close to its full capacity. this happens in a design where a solar farm is going to be connected to grid (230 kV). should any special design be considered for transformer in these cases?
thanks.
my question is what happens if a power transformer is loaded most of the time close to half its full capacity and only for a very short period close to its full capacity. this happens in a design where a solar farm is going to be connected to grid (230 kV). should any special design be considered for transformer in these cases?
thanks.






RE: power transformer sizing
Greater voltage drop on feeders under heavier loading.
Is there any related equipment that is very voltage sensitive?
Bill
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"Why not the best?"
Jimmy Carter
RE: power transformer sizing
RE: power transformer sizing
RE: power transformer sizing
RE: power transformer sizing
Voltage mismatch may cause reactive current to flow.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: power transformer sizing
However I would imagine you could do the same as with a pole top unit. Physics would say it is (should be) possible.
RE: power transformer sizing
RE: power transformer sizing
RE: power transformer sizing
Early wind farms using standard transformers experienced higher than expected failure rates due to cyclic loading. I haven't seen the new IEEE guide, but I would expect your transformer specification to include provisions to deal with thermal expansion/contraction cycles. Thermal cycling can impact the winding/paper system from thermal stresses as well as increasing the amount of air moving through the oil preservation system. From an maintenance point of view, be sure to account for increased nitrogen/desiccant usage.