Tracking the Damping Contribution of a Power System Component Under Ambient Conditions

This letter presents a method for tracking the damping contribution of a power system component in near real-time based upon oscillation energy dissipation. By transforming the energy flow into the frequency domain, the new derivation demonstrates a new theoretical basis and a wider applicability of using the energy-flow theory to analyze power system damping problems. The concept is demonstrated via a non-linear simulation and an actual-system data set.