Training Course in Short Circuit Analysis
89
Apply Kron’s reduction. We get 1
X
(1) bus
=
2
3
4
1
0.2669 0.2403 0.1664 0.1959
2 3
0.2403 0.2884 0.1996 0.2351 0.1664 0.1996 0.2920 0.2551
4
0.1959 0.2351 0.2551 0.3671
Note: This is the positive-sequence bus-impedance matrix for the four-bus test system.
U. P. National Engineering Center National Electrification Administration
Competency Training & Certification Program in Electric Power Distribution System Engineering