development of MATLAB program for transient stability analysis of single machine infinite bus and multi machine system by point by point method.

A $2$o MVA generator delivers $18$ MW over a double circuit line an infinite bus. The generator has KE of $2\mathrm{.}5$ MJ$/$MVA at a rated speed. The generator transient reactor is Xd $=0\mathrm{.}35$p$.$u$.$ Each transmission circuit has R $=0$ and a reactance of $0\mathrm{.}2$ p$.$u on $20$ MVA base. $|$E$|=1\mathrm{.}1$p$.$u and infinite bus voltage V$=1\mathrm{.}0.$ A three phase short circuit occurs at the midpoint of one of the transmission lines. Plot swing curves with fault cleared by simultaneous opening of breakers at both ends of the line at $6\mathrm{.}25$ cycles after the occurrence of fault. Also plot the swing curve over the period of $0\mathrm{.}5$ s if the fault sustained