Quantifying the synthetic inertia and load-damping effect of a converter-interfaced power source

Converter-interfaced power sources (CIPSs) such as renewable generation and energy storage can operate in inertia emulation mode to support the frequency response of a power grid. This paper proposes an approach to derive the synthetic inertia and load-damping effect of the CIPS using a linearized model connected to an equivalent single machine representing the grid. Case studies are performed to investigate the impacts of six parameters on the synthetic inertia and load-damping effect of the CIPS. These results can be used for better understanding of the time-varying properties of the CIPS and for improved control design.