To inform high-fidelity 100% renewable energy grid (T100RE) models with dynamic modeling, theory, and associated tools for stability analysis and control of T100RE power grids to leverage inverter based resources (IBR) flexibility for ancillary services.
A significant fraction of new clean energy resources will be interfaced with the power grid via inverters whose dynamic response is dictated by vendor-specific software control rather than the physical laws governing the behavior of the resource itself. While fast controllability of IBRs presents an opportunity to shape the power grid dynamic response, there is a risk of triggering unstable or poorly damped oscillations and unacceptable variations in grid frequency. Such stability threats force power grid operators in Australia, the UK and the US to operate conservatively by curtailing variable renewable energy (VRE) outputs. Furthermore, as IBRs displace fossil-fuel generators, the ancillary services provided by the latter to maintain power grid stability diminishes. Without enabling the provision of ancillary services from IBRs, fully decommissioning fossil-fuel generators is impossible, or would be prohibitively costly.