electricpy.zpu

electricpy.zpu(S, VLL=None, VLN=None)

Per-Unit Impedance Evaluator.

Evaluates the per-unit impedance value given the per-unit power and voltage bases.

\[Z_{pu}=\frac{V_{LL}^2}{S}\]

\[Z_{pu}=\frac{(\sqrt{3}*V_{LN})^2}{S}\]

Parameters:

• S (float) – The per-unit power base.

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

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

Returns:

Zbase – The per-unit impedance base.

Return type:

float