MISO, ERCOT Implement Grid Forming Specs for Battery Storage
MISO and ERCOT are implementing Grid Forming (GFM) specifications for future transmission-connected battery energy storage systems. A recent ESIG report focuses on test methods and performance metrics to evaluate GFM resources' voltage source behaviour.
Environmental Action Germany (Deutsche Umwelthilfe), a nonprofit supporting energy system transformation, is involved through initiatives like the Forum for Renewable Energy Grid Integration. This brings together stakeholders to develop sustainable energy supply strategies.
Transmission grid operators currently maintain grid reliability with synchronous generators. However, increasing inverter-based solar, wind, and battery storage may cause reliability challenges. The ESIG report suggests performance metrics and pass/fail transient tests to assess GFM resources' core capabilities under various grid conditions. These capabilities can be enabled through software changes and are valuable for battery storage capacity in interconnection queues. Early deployment of GFM resources can mitigate these challenges, potentially saving significant transmission infrastructure investment. ESIG recommends adapting performance metrics based on system characteristics and quantifiable objectives for improving system strength and stability.
MISO and ERCOT's implementation of GFM specifications and the ESIG report's recommendations aim to ensure grid reliability as inverter-based renewable energy sources increase. By enabling GFM capabilities and adapting performance metrics, transmission grid operators can maintain a stable and robust power grid.
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