Limit Induced Bifurcation Caused by SVC Capacity Limit

The paper demonstrates and studies limit induced bifurcation (LIB) caused by SVC capacity limit. If the capacity limit is greater than a critical value, LIB occurs when an SVC reaches limit. In static analysis, the operating point is on the lower half of the PV curve after limit. Dynamic analysis reveals the immediate change of stability when LIB occurs. A stable equilibrium point and an unstable equilibrium point meet and vanish at the bifurcation. The consistency of the results of static and dynamic approaches verifies the validity of static voltage stability analysis. LIB caused by SVC capacity limit in the IEEE 30-bus system is also presented.