Optimal power flow based on generation rescheduling priority for transient stability enhancement

Abstract

This paper presents an optimal power flow method based on the generation rescheduling priority to enhance transient stability in power systems. In order to determine the generation rescheduling priority the energy margin sensitivity indices are calculated. The candidate generators for generation rescheduling are determined by the energy margin sensitivity indices and then optimal power flow (OPF) is calculated. The OPF formulates the Lagrangian function with the power flow equations and the fuel cost function and searches the optimal solution of the Lagrangian function by using the Newton's approach. The method proposed is applied to a 6-bus 7-lines system to demonstrate its effectiveness.