An Investigation of Limit Induced Bifurcation in Dynamic Model of Wind Power System

Abstract

In this paper the dynamic model for Limit Induced Bifurcation in wind power systems is constructed and used to locate these bifurcation points of wind farms in WSCC-9Bus system. For the sake of system stability, the Limit Induced Bifurcation is investigated under different wind speed conditions. Moreover, the initial condition of an optimal model is calculated through the method of Quasi Steady-State Analysis (QSS). It is safe to conclude that wind farms operating with higher wind velocity will have larger load margins, trading the probability of Limit Induced Bifurcation. Moreover, systems with wide hard-limits for dynamic devices and large fluctuations in wind speed will suffer from a varying bifurcation, either Limit Induced Bifurcation or Saddle Node Bifurcation, thus becoming more vulnerable against system voltage collapse.