Ancillary Services Cost Allocation

Key Dates & Materials

Postponed | October 21 - 22 | AS Cost Allocation Workshop

September 17 - October 10 | Discussion Board open

Oct. 8, 2025 | Stakeholder Update

Following the release of the addendum to FFR+ rationale document and received stakeholder feedback, the AESO is considering concepts and associated designs for procuring FFR. The workshop scheduled for October 21–22 is postponed in favour of a more productive session on cost causation and recovery once design decisions are made.

Note that we have closed the associated discussion forum and will re-open it when a new date for the workshop is announced.

Those who have registered will receive a cancellation notice by email. We apologize for any inconvenience and appreciate your understanding.

Engagement Schedule (Updated September 3, 2025)

Discussion Board | September 17 - October 8, 2025

We have paused the collection of input on this Discussion Board until a new date for the AS Cost Allocation Workshop is announced.

This discussion will help inform a future session. We’ve posted a few questions to guide the conversation, but welcome any additional comments, questions, or perspectives you’d like to share. Your input will help support the development of cost allocation methodologies for frequency response services.

How to use this Tool

Things To Keep in Mind

This public forum serves as a collaborative space where stakeholders can share and discuss their thoughts, suggestions, and creative solutions in a respectful and constructive way. This ensures that everyone's contributions are valuable and that the board remains a positive and inclusive space for dialogue and innovation.

Key Dates & Materials

Postponed | October 21 - 22 | AS Cost Allocation Workshop

September 17 - October 10 | Discussion Board open

Oct. 8, 2025 | Stakeholder Update

Following the release of the addendum to FFR+ rationale document and received stakeholder feedback, the AESO is considering concepts and associated designs for procuring FFR. The workshop scheduled for October 21–22 is postponed in favour of a more productive session on cost causation and recovery once design decisions are made.

Note that we have closed the associated discussion forum and will re-open it when a new date for the workshop is announced.

Those who have registered will receive a cancellation notice by email. We apologize for any inconvenience and appreciate your understanding.

Engagement Schedule (Updated September 3, 2025)

Discussion Board | September 17 - October 8, 2025

We have paused the collection of input on this Discussion Board until a new date for the AS Cost Allocation Workshop is announced.

This discussion will help inform a future session. We’ve posted a few questions to guide the conversation, but welcome any additional comments, questions, or perspectives you’d like to share. Your input will help support the development of cost allocation methodologies for frequency response services.

How to use this Tool

Things To Keep in Mind

This public forum serves as a collaborative space where stakeholders can share and discuss their thoughts, suggestions, and creative solutions in a respectful and constructive way. This ensures that everyone's contributions are valuable and that the board remains a positive and inclusive space for dialogue and innovation.

Discussions: All (6) Open (0)

  • General - Cost Allocation

    23 days ago
    2 Responses
    CLOSED: This discussion is on hold until further notice.

    You need to be signed in to add your comment.

    Have you thought about how costs could be allocated for frequency response services (FFR, FRR, FFR+)? If so, please share your ideas.

    Go to discussion
    Replies Closed

  • Methodology

    23 days ago
    2 Responses
    CLOSED: This discussion is on hold until further notice.

    You need to be signed in to add your comment.

    When designing cost allocation for each product, what should the AESO consider? Should each product have its own method, or should the same method apply to all?

    Go to discussion
    Replies Closed

  • Data Source

    23 days ago
    1 Response
    CLOSED: This discussion is on hold until further notice.

    You need to be signed in to add your comment.

    Would you prefer cost allocation to be based on actual or forecast data?

    Go to discussion
    Replies Closed

  • Other Considerations

    23 days ago
    1 Response
    CLOSED: This discussion is on hold until further notice.

    You need to be signed in to add your comment.

    Are there other factors the AESO should consider when choosing the most appropriate cost allocation approach?

    Go to discussion
    Replies Closed

  • Use of FFR+ for Other Needs

    23 days ago
    1 Response
    CLOSED: This discussion is on hold until further notice.

    You need to be signed in to add your comment.

    Do you agree that using FFR+ to support other reliability and system needs is appropriate? If no, why not? If yes, what cost allocation method would be most appropriate? Could a fixed percentage by technology type or class (based on historical data) be effective, or should the method reflect the role FFR+ plays in each interval?

    Go to discussion
    Replies Closed

  • Research or Studies

    23 days ago
    CLOSED: This discussion is on hold until further notice.

    You need to be signed in to add your comment.

    Have you done any studies or research related to these topics that you would like to share? If yes, please note here and send to ISOTariffRedesign@aeso.ca

    Go to discussion
    Replies Closed
Page last updated: 08 Oct 2025, 11:04 AM