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United States. Federal Energy Regulatory Commission

MISO 1.E FERC Electric Tariff Definitions Module 91.0.0

Strategic Insights

— 1 min read

The Midcontinent Independent System Operator, Inc. has submitted a document to the Federal Energy Regulatory Commission outlining various definitions and procedures related to electric tariffs and reliability standards. The document covers a wide range of topics, including electric facility, electric generation and transmission cooperative, electric storage resource, and emergency demand response.

Key Takeaways:

  • The document defines Electric Storage Resource (ESR) as a resource capable of receiving energy from the transmission system and storing it for later injection of energy back to the system.
  • ESR must be capable of injecting and withdrawing a minimum of 0.1 MW, complying with the transmission provider's setpoint instructions, having appropriate metering equipment installed, and being physically located within the MISO Balancing Authority Area.
  • The document also defines Electric Storage Resource Efficiency Factor as the amount of increase in energy storage level for each 1 MWh of charge energy withdrawn by the resource.
  • Emergency Demand Response (EDR) is defined as a resource that can respond to an EDR dispatch instruction, in accordance with Schedule 30, to reduce demand or increase output from on-site end-use customer generation during emergencies.
  • The document outlines various emergency procedures, including declaration of maximum generation emergency warning, emergency operations resource, and emergency operations resource all-in energy offer.

Statistics:

  • The document defines Electric Facility as equipment used for the generation, transmission, storage, or control of electricity that is connected to or part of the transmission system operated by the transmission provider.
  • The Electric Reliability Organization (ERO) certified Balancing Authorities operating in the eastern part of North America.
  • Effective Import Tie Capability (EITC) and Effective Export Tie Capability (EETC) are defined as the maximum aggregate level of power in MW that can be reasonably expected to flow on the transmission tie lines into and out of a specified Zone of the transmission system.

Sources:

  • Midcontinent Independent System Operator, Inc. (2025). MISO 1.E FERC Electric Tariff Definitions - E MODULES 91.0.0, 92.0.0Effective On: September 30, 2025.

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