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voltage regulation

voltage regulation

voltage regulation

(OP)
Where do I go to find the necessary formulas to calculate the voltage on the low side of a step down transformer?  I have the impedance, the watt loss, turns ratio and the load.  I can do the v=ir and calculate the voltage drop on an per unit basis but I would like to verify if I am doing it right.

RE: voltage regulation

You will have to get the voltage regulation from the manufacturers test data or published data. You can not calculate from the data you have.

RE: voltage regulation

You are basically correct.  The voltage drop is the difference in source voltage magnitude and load voltage magnitude.  Assume one per unit voltage at the load side and add V=I·Z vectorially to get the source voltage.  You can get the transformer reactance X in pu from the impedance Z in pu and the resistance R in pu which is load loss divided by the transformer rating.  X²=Z²-R²

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