Many of today’s power systems rely on inertia, or the natural tendency of generators synchronized to the system frequency to stay in motion, to correct frequency deviation during power system imbalance events. As grid systems evolve, their increasing levels of inverter-based resources, such as wind, solar photovoltaics, and battery storage, do not inherently provide inertia, but can provide different (sometimes faster or better) kinds of frequency responses. For this reason, system operators transitioning their power systems to renewable energy generation sources are exploring solutions to the reduction of generation synchronized to grid frequency, or the reduction of inertia, so their system can remain stable in the first seconds after an imbalance event.  

G-PST hosted a virtual summit in March 2024 focused on addressing inertia’s role in maintaining power system frequency. Over 80 attendees including representatives from 10 power system operators joined the two-day event to share cutting-edge practices and research and offer insight into what research and analysis questions should be prioritized to better understand the opportunities and challenges presented by inertia’s evolving role in managing system stability. The summit served as a forum to share experiences, ask questions, and explore how G-PST can best support system operators as they navigate this evolution and consider what frequency metrics may exist beyond inertia. 

Explore presentations from the summit:

Inertia Management on the Power Systems of Ireland and Northern Ireland 
Simon Tweed, Eirgrid

ERCOT Control Room Situational Awareness Tools
Luis Hinojosa, Electric Reliability Council of Texas