A Nonlinear Coordinated Approach to Enhance the Transient Stability of Wind Energy-Based Power Systems

Abstract

This paper proposes an adaptive super twisting sliding mode-based zero dynamics (ZD) approach to coordinate synchronous generators (SGs) and doubly-fed induction generator (DFIG). Its main objective is to enhance the transient stability of power systems with wind energy penetration. The proposed approach takes into consideration the interactions among the SGs and DFIGs along with system’s nonlinearities. Assessment was performed on a modified four-machine two area Kundur power system subject to a symmetrical three phase fault. The obtained results were also compared to those achieved using a conventional uncoordinated power system stabilizer/power oscillation (PSS/POD) technique and exact feedback linearization (EFL). Improving power system’s transient stability margin and enhancing damping while reducing the order of the feedback linearized power system are among the positive features of the proposed coordinated design.