Network-Preserving Sensitivity-Based Generation Rescheduling for Suppressing Power System Oscillations

Abstract

As power system operation conditions vary, the system may move into critical operating conditions with oscillatory behaviors. In this paper, a generation rescheduling method is proposed for damping critical modes so that oscillations can be suppressed. This proposed method calculates the analytical eigenvalue sensitivity to identify the most effective generators for rescheduling to enhance the damping of the critical mode, thereby suppressing the oscillations. The eigenvalue sensitivity calculation is based on the structure-preserving network representation and the generalized eigenvalue problem. Numerical evaluation of the proposed method is performed with a focus on mode shape and participation factor analysis. The results show that the proposed method is effective in controlling power system oscillations via generation rescheduling.