Question

The line reactance of a power system network are as follows:

From Bus	To Bus	Reactance
0	1	0.3 p.u.
1	2	0.5 p.u

The bus impedance matrix with '0' as reference bus is,

• A. $\left[\begin{array}{cc}0.3& 0.6\\ 0.6& 0.8\end{array}\right]$
• B. $\left[\begin{array}{cc}0.5& 0.3\\ 0.3& 0.8\end{array}\right]$
• C. $\left[\begin{array}{cc}0.3& 0.3\\ 0.6& 0.8\end{array}\right]$
• D. $\left[\begin{array}{cc}0.3& 0.3\\ 0.3& 0.8\end{array}\right]$

Answer 1

The correct option is D $\left[\begin{array}{cc}0.3& 0.3\\ 0.3& 0.8\end{array}\right]$

$Z_{Bus\left(new\right)}=\left[\begin{array}{cc}0.3& 0.3\\ 0.3& 0.3+0.5\end{array}\right]=\left[\begin{array}{cc}0.3& 0.3\\ 0.3& 0.8\end{array}\right]$