Are you ready for July 2025?

Worried about meeting the requirements of FERC Order 881 before the July 2025 deadline? Heimdall Power provides a comprehensive solution that can be fully deployed across all your transmission lines in less than two weeks.

FERC Order 881 Requirements

According to FERC Order 881, all U.S. transmission lines must be covered by Ambient Adjusted Ratings (AAR) by July 2025. Below, we’ve listed some of they key requirements of the Order, but you can also visit our designated FERC Order 881 page for further details.

  • Requiring AAR: By championing the use of Ambient Adjusted Ratings (AAR) as a baseline for all transmission lines, Order 881 mandates that U.S. utilities take concrete action, with the aim to increase the utilization of their existing infrastructure. The implementation of at least AAR ensures a more accurate reflection of a line’s real-time capability, optimizing energy transmission across the grid.
  • 10-Day Hourly Forecasts: Achieving better forecasting of available transmission capacity is another important part of Order 881. Therefore, it will be required that utilities implement a rolling 240 hour forecast based on AAR data. These AAR ratings need to be updated with hourly granularity.
  • Transparency: Order No. 881 mandates public utility transmission owners to share line ratings and methodologies with their transmission providers and market monitors. Transmission providers are also required to maintain a secure database of these ratings and methodologies, enhancing overall transparency.
  • Emergency Ratings: The Commission specifies that transmission providers must use uniquely determined emergency ratings, bolstering network reliability during unexpected events.

Why Heimdall Power?

  • Comprehensive, fully integrated AAR Solution that comply with all Order 881 requirements.

  • Swift set-up – get the full system operative with all your transmission lines rated in a matter of weeks.

  • Easy to use, cost-efficient and scalable out-of-the-box solution, built to meet your needs today and tomorrow.

  • Seamless upgrade to DLR ensures a fully future-proof system.

  • Fully Compliant with NERC CIP.  

Below is an example illustration of what Ambient Adjusted Ratings from Heimdall Power could look like in your EMS system (all values are fictional). And don’t worry about the data integration, we’ll take care of that part for you!
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Get started on your journey towards FERC Order 881 compliance today by booking a demo, or request more info about our solutions through the buttons below! 

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