Network protection performance audits under high levels inverter-based generation systems

The growing penetration of inverter‑based generation (IBG) in modern power systems introduces major challenges for protection coordination. Because IBGs contribute little inertia and supply limited short‑circuit current, they reduce overall grid strength and alter traditional system dynamics. As IBG levels increase, the Short Circuit Ratio (SCR) declines, weakening the network and increasing the likelihood of misoperations in distance and overcurrent protection schemes. This makes accurate assessment of fault clearing times critical for maintaining system stability and protection reliability. In this evolving context, new methodologies are required to help protection engineers detect vulnerabilities and ensure dependable operation despite reduced system strength.