Large batteries with grid-forming inverters can increase renewables hosting capacity

AI generated summary

Researchers from the Energy Systems Integration Group (ESIG) have published a study advocating for the adoption of grid-forming battery energy storage systems (GFM BESS) by transmission system operators. The study highlights the potential of GFM BESS to enhance grid stability and increase the hosting capacity for renewable energy sources like solar and wind. By evaluating an actual transmission network, the research demonstrated that replacing grid-following battery energy storage systems (GFL BESS) with GFM BESS could significantly improve the integration of additional solar generation, particularly in areas with weak grid conditions.

The findings indicate that GFM BESS can provide essential grid-stabilizing characteristics, allowing for greater hosting capacity of inverter-based resources before reaching stability limits. The study recommends that operators implement GFM BESS system-wide to maximize renewable energy integration and develop technical requirements for these systems. Additionally, it emphasizes the cost-effectiveness of GFM BESS compared to other solutions and encourages immediate action to leverage battery energy storage system interconnections, as retrofitting can be costly.