ACES Members Successfully Implemented Into MISO South

May 3, 2024

On December 19, 2013, the Midcontinent Independent System Operator (MISO) successfully integrated a four state region, referred to as MISO South, into MISO’s existing footprint. ACES assisted with the successful implementation of two of its Members, South Mississippi Electric Power Association (SME) and Arkansas Electric Cooperative Corporation (AECC), into MISO South.

The integration added approximately 40,000 MW of load and generation capacity as well as 18,000 miles of transmission to MISO. AECC and SME will collectively contribute approximately 3,600 MW of load and 5,300 MW of capacity to the MISO South footprint. This integration has made MISO one of the world’s largest energy and operating reserve markets and is expected to result in a more efficient dispatch of resources to meet energy demands. 

The integration of AECC and SME was a culmination of over 12 months of coordinated operational and commercial effort among teams at ACES, AECC, SME, and MISO. ACES would like to thank everyone involved for a successful implementation.

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