The integration of renewable energy sources (RES) into modern power systems is transforming the traditional reliance on synchronous generators, leading to a greener energy portfolio while posing significant challenges to system stability due to reduced inertia. Diminished system inertia results in elevated rates of change of frequency (RoCoF) and larger frequency deviations, potentially culminating in blackouts. Accurate inertia estimation is paramount for implementing virtual inertia control and enhancing frequency support services. This study investigates curve-fitting techniques, with a focus on polynomial fitting, for inertia estimation. Simulations are conducted on a modified IEEE 9-bus... More >