Probabilistic transient stability studies using the method of bisection

In this paper, a method of bisection is introduced as a tool to considerably reduce the amount of computation time required in the stochastic evaluation of transient stability. This method proves to be very helpful in predicting the number of stability runs required to calculate the probabilistic transient stability indices for a given system location, a certain transmission line or for the overall system. The developed method is examined utilizing a hypothetical test system and the effect of load forecast uncertainty is illustrated. The effect of modeling and employing high-speed simultaneous or adaptive reclosing is also presented and discussed.