electricpy.zrecompose

electricpy.zrecompose(z_pu, S3phs, VLL=None, VLN=None)[source]

Impedance from Per-Unit System Evaluator.

Function to reverse per-unit conversion and return the ohmic value of an impedance given its per-unit parameters of R and X (as Z).

Parameters:

  • z_pu (complex) – The per-unit, complex value corresponding to the impedance

  • S3phs (float) – The total three-phase power rating of the system.

  • VLL (float, optional) – The Line-to-Line Voltage; default=None

  • VLN (float, optional) – The Line-to-Neutral Voltage; default=None

Returns:

z – The ohmic impedance evaluated from the per-unit base.

Return type:

complex