Graphical method for solving transient stability problems

A graphical method for solving transient power-system stability problems is presented. This method is especially simple and feasible for handling transient-stability problems of multimachines when damping is considered. Practical examples are presented to illustrate the applications of this method; tedious numerical computations are entirely eliminated, thus minimising arithmetical errors. The accuracy of this method is comparable to that of the analytical method. The allowable maximum input and effects of opening and reclosing a faulted line are considered in detail.