Bifurcation Analysis of a Series Compensated System with STATCOM-ES

The energy storage devices incorporated into FACTS controllers increase the operational flexibility and reduce capital cost. This paper investigates the effect of Static Synchronous Compensator with energy storage (STATCOM-ES) on dynamic bifurcations of Subsynchronous resonance (SSR). The test system considered is IEEE first benchmark model (FBM). The line is provided with fixed series compensation and active shunt compensation at the electrical center of the line. The degree of series compensation is taken as the bifurcation parameter. The results of bifurcation analysis are validated by performing transient simulation of the system.