AEMO turns to battery inverters to run big grids with no synchronous generation

NREL: Inertia and the Power Grid: A Guide Without the Spin - https://docs.nrel.gov/docs/fy20osti/73856.pdf

NREL: Understanding Inertia Without the Spin [video] - https://www.youtube.com/watch?v=b9JN7kj1tso

Battery storage synthetic inertia has the potential to negate the need for synchronous condensers, whether dedicated installations, or thermal generators that have been modified with a clutch system to allow for syncon operating modes when not firing with fuel.

https://en.wikipedia.org/wiki/Synchronous_condenser