Midwest Independent Transmission System Operator

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The Midwest Independent System Operator (also known as MISO) is the Independent System Operator that monitors the high voltage transmission system throughout the Midwest. With 920,000 miles of transmission under its jursidiction, MISO operates one of the largest real time energy markets in the world.

The main function of MISO is its reliability function. System operators known as Reliability Coordinators and Reliability Anaylst monitor the system 24/7. The RC uses a model of the system and calculates power flows across the country.

The use of the power flow model gives the ability to calculate parallel flows caused by line outages and predict overloads before they occur.

The Midwest Independent Transmission System Operator is an essential link in the safe, cost-effective delivery of electric power across much of North America. The Midwest ISO is committed to reliability, the nondiscriminatory operation of the bulk power transmission system, and to working with all stakeholders to create cost-effective and innovative solutions for our changing industry.

As a fully integrated regional transmission organization, the non-profit Midwest ISO assures industry consumers of unbiased regional grid management and open access to the transmission facilities under Midwest ISO's functional supervision.

Midwest ISO optimizes the efficiency of the interconnected system, provides regional solutions to regional planning needs and continually minimizes any risk to reliability.

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