An approach based on potential energy balance for transient stability improvement in modern power grid

Abstract

Direct energy function based methods for power system stability analysis proves to be more important especially when dealing with distributed energy resource (DER) integrated power grid. In this paper, it is shown that in order to make a system more stable, either the kinetic energy absorbed during a disturbance should be reduced, or the potential energy absorbing capacity of the network should be increased. Further, a method based on this concept is proposed using reactive power (VAR) control, which increases potential energy absorbing capacity of the grid during transient conditions. The proposed method has been first proved mathematically, and the results for its application on the IEEE 9 bus system is presented.