A new method to study an energy storage system to damp power system oscillations

This paper presents a novel analytical method in studying the capability of an energy storage system (ESS) installed in a power system to damp power system oscillations. The proposed method is based on the well-know equal-area criterion and linearized small-signal stability analysis. In the paper, the proposed method is presented generally for the analysis of damping a power oscillation along a transmission line in the power system. The method then is used to study damping power system oscillations in a single-machine infinite-bus power system installed with a shunt-connected ESS. Many useful analytical conclusions are obtained, which clearly and simply explains why and how the ESS can effectively suppress power system oscillations.