The Australian Renewable Energy Agency has awarded the University of New South Wales AU$6.52 million to investigate how grid-forming battery storage interacts with existing power system protection schemes, a critical technical frontier as Australia accelerates its transition to inverter-dominated electricity networks. The research addresses a fundamental challenge: traditional protection systems were designed for synchronous generators with predictable fault currents, while grid-forming inverters behave differently during disturbances, potentially causing mis-coordination or failure to isolate faults. Solving this compatibility issue is essential for maintaining system strength and reliability as coal plants retire and renewable penetration deepens.
Australia’s grid is undergoing one of the world’s fastest energy transitions, with rooftop solar alone regularly supplying more than half of daytime demand in some states. This shift has eroded the inertia and fault-level contributions that conventional protection relays rely on, creating what engineers call a “protection blind spot.” Grid-forming batteries — which can synthesize voltage waveforms and provide synthetic inertia — are widely seen as the solution, but their deployment at scale requires certainty that they will not compromise the selective tripping logic that keeps the network safe. The UNSW project will model these interactions across a range of fault scenarios and grid topologies, producing validated guidelines for protection setting coordination in high-inverter grids.
The funding reflects a growing recognition among regulators and market operators that technical integration work is as urgent as capacity addition. AEMO’s recent engineering roadmaps have flagged protection coordination as a priority action item, and the Energy Security Board has highlighted system strength services as a core reform area. By focusing on the intersection of inverter control algorithms and protection philosophy, this research fills a gap that sits between equipment manufacturers’ lab testing and network service providers’ operational standards. The outcomes will inform not only Australian grid codes but also international best practice, as other jurisdictions confront the same physics of inverter-based resource integration.
Read the full report at Energy Storage News.