MISO Seeking Realistic Gen Buildout for Tx Planning Futures

AI generated summary

MISO is revising its 20-year transmission planning futures following the repeal of renewable generation tax credits by the Trump administration. The grid operator found that the constraints introduced by the One Big Beautiful Bill Act resulted in unrealistic capacity expansion modeling, indicating a build rate that is not feasible. MISO plans to take several months to adjust its capacity assumptions in light of the new law, as the initial models projected an excessive amount of generation in the first five years.

Director of Economic and Policy Planning Christina Drake emphasized the need for a more realistic approach to near-term build-out, taking into account current supply chain issues and the rollback of renewable energy incentives. MISO's historical build rate, considering recent challenges, suggests that only 9 GW can realistically be built per year. To address these concerns, MISO will hold additional workshops throughout the fall to refine its capacity expansion estimates, with the updated futures set to inform long-range transmission planning in 2026.