Voltage Sag Due To Transformer Starting
Voltage Sag Due To Transformer Starting
(OP)
Does anyone know how to estimate the voltage sag on system voltage upon energizing a transformer, using transformer and system impedance? I am trying to determine a ball park number before going to some type of transient analysis evaluation.






RE: Voltage Sag Due To Transformer Starting
Transformer inrush currents are rich in harmonics, so that complicates the analysis. I'm sure there are a lot of papers written on this topic - you might search IEEE website.
I'd be interested to know what you come up with.
RE: Voltage Sag Due To Transformer Starting
RE: Voltage Sag Due To Transformer Starting
RE: Voltage Sag Due To Transformer Starting
László Prikler, György Bánfai, Gábor Bán, & Péter Beckerhttp at http:
This includes an approximate equation for transformer inrush.
RE: Voltage Sag Due To Transformer Starting
>I'm not sure how to apply that to voltage drop.
Well, 3winding, if you know the inrush-current and the impedance of your grid you have to apply the formula:
U = I*Z