Running a power system is a delicate balancing act; system operators must carefully match supply and demand around the clock. Typically, that means turning on fossil fuel generators when demand is high, but how can that balance be maintained in a system dominated by renewables? In this episode, Cormac is joined by Dr Luis Badesa, a Research Associate in Imperial College London’s Department of Electrical and Electronic Engineering, to discuss the role of ‘inertia’ and explore how an increase in clean power will affect our approach to keeping the electricity grid stable in the future.