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MISO expects adequate resources for summer heat

RTO discusses readiness, preparation for extreme events

For Immediate Release

April 25, 2018

Media Contact

Mark Brown

CARMEL, Ind. — MISO has projected adequate power reserves to meet 2018 summer peak demand. The regional transmission organization expects summer demand to peak at 124.7 gigawatts, with 148.6 GW of available capacity.

The system’s summer peak demand forecast was reviewed during the April 24 Summer Readiness Workshop, a part of MISO’s reliability planning efforts.

“MISO capacity levels exceed our 2018 summer peak forecast and our reserve margin requirement,” said Clair Moeller, MISO president and chief operating officer. “The work of the load-serving entities, states and local jurisdictions continue to help ensure adequate resources to meet the region’s power needs.”

Overall declining load forecasts by load-serving entities, combined with an increase in both demand-response and behind-the-meter generation, led to a higher base reserve margin for 2018 of 19.1 percent.

MISO's seasonal assessments review projected demand and resources for the MISO footprint and assess resource adequacy and risks for upcoming seasons. These projections are compared to the minimum Planning Reserve Margin requirements established under MISO's Tariff.

Preparing for extreme temperatures
The current weather outlook indicates a warmer-than-normal summer for much of the mid-continent region. MISO noted that sustained high temperatures can have an impact on day-to-day operations. The RTO plans extensively to prepare for emergency operations that help maintain bulk electric system reliability.

“MISO continuously works to improve and implement procedures and processes to monitor situations and proactively address challenges – such as extreme weather situations – throughout the year,” Moeller noted.

The RTO holds regular Summer Readiness Drills with members, market participants and MISO operators to review emergency operating procedures and test communication protocols. All MISO stakeholders can participate in the Summer Readiness Workshop to understand how the region prepares for potential extreme weather conditions.

MISO works closely with stakeholders to address long term resource adequacy needs through a range of efforts. This includes the increased transparency around future resource projections provided by the Organization of MISO States – MISO survey.  

For more information, see MISO’s 2018 Summer Readiness Workshop presentation materials.


About MISO

MISO ensures reliable operation of, and equal access to, high-voltage power lines in 15 U.S. states and the Canadian province of Manitoba. MISO manages one of the world’s largest energy markets, with more than $24.7 billion in annual gross market energy transactions. MISO was approved as the nation’s first regional transmission organization in 2001. The not-for-profit organization is governed by an independent board of directors and is headquartered in Carmel, Indiana.