Online Oscillation Detection based on PMU-Data in the Control System

Low-frequency oscillations are a widely observed phenomenon within power systems. One generally distinguishes between local and inter-area oscillations [1]. Poorly damped or undamped oscillations pose a risk to the power system’s stability. With the rise of power electronics in the grid, sub-synchronous oscillations with higher frequencies have been observed [2], leading to an increased need for near-real-time identification during operation [3].