Grid Single Phase Source

Grid Single Phase Source with source impedance model using RL branch based on short circuit level or transformer capacity & impedance.

Grid Single Phase Source with source impedance model using RL branch.

User can define the grid source line voltage, frequency, transformer power capacity, transformer impedance, short circuit level and X/R ratio to determine the source impedance, R and L.

Determine R & L based on transformer power capacity and transformer impedance

Zbase = Vrms^2/S;

Z = Zbase * (ZTx/100);

R = Z/sqrt(1+X_R^2);

L = (R*X_R)/(2*pi*f0);

Determine R & L based on 3 phase short circuit level at base voltage

XL = Vrms^2/SC;

R = XL/X_R;

L = XL/(2*pi*f0);

Developed by Rodney Tan (PhD)

Version 1.00 (Aug 2025)