Transformer's Temperature 1

[mfmsheri]

Hi ,

i am asking about transformer's temperature

There is any correlation between the Winding's temperature and (Var) which generated by the Generator?

for instance i have to case with same ambient temperature :-
the first, i generate (150MW) with (5Mvar)
the second, i generate (150MW) with (15Mvar)

there is any difference on the winding's temperature for the transformer?

with regards

 

[waross]

the first, i generate (150MW) with (5Mvar) -- 150.08 MVA
the second, i generate (150MW) with (15Mvar) -- 150.75 MVA = 1.00446 greater current, 1.009 greater I2R losses

there is any difference on the winding's temperature for the transformer? Probably not enough to measure.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[prc]

Transformer winding temperature solely depends on the current ie only on MVA and not on MW.

 

[krisys]

So a difference will be certainly there. However small difference it may be!!!

 

[waross]

Calculate your MVA. With constant voltage the MVA determines the current and the I²R heating.

Bill
--------------------
"Why not the best?"
Jimmy Carter