From: Estimating zero-sequence impedance of three-terminal transmission line and Thevenin impedance using relay measurement data
Source impedance (Ω)
Magnitude error (%)
Phase angle error (degrees)
Actual
Estimated
Z G1
3.75 ∠86°
3.78 ∠89.2°
0.80
3.2
Z G2
0.00
Z G0
11.25 ∠86°