Dynamic and Frequency-Domain Assessment of Power System Strength in Grids Dominated by Inverter-Based Resources

The ongoing energy transition is driving a fundamental transformation of the European power systems, motivated by ambitious decarbonization targets. These commitments translate into a rapid increase of renewable energy sources (RES) connected to the grid, predominantly interfaced through inverter-based resources (IBRs). This evolution imposes new technical challenges for power system operation and planning, particularly in ensuring stability and maintaining power quality in grids with a high share of inverter-interfaced generation.