Nonlinear variable structure control technique for power system excitation controllers

摘要

In this study the nonlinear variable structure control (VSC) method is applied to the excitation control system. A new technique to find nonlinear switching surfaces is presented. This method is then used to design the control strategy for the excitation system. Responses to various large perturbations are simulated. The simulation results show that applying the VSC method to the excitation control system can considerably improve the transient stability limit of power systems and improve the dynamic properties of generators.