Consider the power system as shown in figure. Each generator and the line impedance of (0.2 + j 0.2) pu and (0.5 + j 0.5) pu respectively.
Neglecting line charging admittances,
The Y bus matrix for the above bus system is
\({Y_{bus}} = \left[ {\begin{array}{*{20}{c}} {{Y_{11}}}&{{Y_{12}}}&{{Y_{13}}}\\ {{Y_{21}}}&{{Y_{22}}}&{{Y_{23}}}\\ {{Y_{31}}}&{{Y_{32}}}&{{Y_{33}}} \end{array}} \right]\)
Which of the following is/are true?
1
Y12 = Y21 = 1 – j1
2
Y11 = 4.5 – j4.5
3
Y22 = 4.5 – j4.5
4
Y33 = 4.5 – j4.5