Transformer Phase Shift
Transformer Phase Shift
(OP)
I looked and read a lot of threads in this forum regarding transformer vector groups. A FAQ sheet was laso readily available explaining the same.
My curiousity through drove me to raise this question. is there a criteria that governs us which vector group has to be chosen for a specific power system aside from paralleling requirements? Since I can vary the vector groups by making modifications on the winding connections, is it ok to specify different transformers with different delta-wye vector angles or is it required that all vector group angles should be the same? (For material stock purposes). Does phase shifting affect power flow?
My curiousity through drove me to raise this question. is there a criteria that governs us which vector group has to be chosen for a specific power system aside from paralleling requirements? Since I can vary the vector groups by making modifications on the winding connections, is it ok to specify different transformers with different delta-wye vector angles or is it required that all vector group angles should be the same? (For material stock purposes). Does phase shifting affect power flow?
GO PLACIDLY, AMIDST THE NOISE AND HASTE-Desiderata






RE: Transformer Phase Shift
For delta wye and wye delta transformers, ANSI standard is the the low voltage winding will lag the high voltage winding by 30 degrees.
There are some situations where a non-standard phase shift is required, as has been discussed.
RE: Transformer Phase Shift
The second part of your question...Phase shift does not affect power flow.
JIM
RE: Transformer Phase Shift
RE: Transformer Phase Shift
In our day-to-day job, we just specify the vector group angle as a matter of client standard requirement or when paralleling to an existing system. I just wanna know if there is a deeper reason of having lots of them in the first place.
GO PLACIDLY, AMIDST THE NOISE AND HASTE-Desiderata
RE: Transformer Phase Shift
As long as the secondary of the transformer is never connected to another power source, the phase shift is not a concern.
RE: Transformer Phase Shift
GO PLACIDLY, AMIDST THE NOISE AND HASTE-Desiderata