AESO

Restructured Energy Market (REM) Update – Internal Demand Rates (IDR)

On March 31, 2026, the Alberta Electric System Operator (AESO) held a workshop concerning the Internal Demand Rate (IDR) revamp. Previously called the ISO tariff, the new name reflects the fact that the current tariff application changes are part of the broader Restructured energy market (REM). The goal of this workshop was to engage stakeholders and solicit feedback on potential transmission rate design features.

For context, the AESO had last asked for approval for a tariff redesign in 2021, but was rejected by the Alberta Utilities Commission (AUC). While not set in stone, many of the features discussed in the recent workshop were heavily based on earlier AUC feedback.



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Restructured Energy Market (REM) Update – Optimal Transmission Planning (OTP)

On January 30, 2026, the Alberta System Electric Operator (AESO) released its Optimal Transmission Planning (OTP) Framework, outlining significant changes to the transmission planning process as part of the broader restructured energy market (REM).

The new framework was released following significant stakeholder feedback earlier in Fall 2025. This included submissions from ENMAX, ATCO Electric, TransAlta, and 17 other major market participants on the proposed changes to transmission planning. The AESO has stressed that optimal transmission planning works hand-in-glove with the implementation of Locational Marginal Pricing (LMP), which we’ve covered earlier.



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Examination of the Customer Contribution Policy

In Proceeding 29006, the Alberta Utilities Commission (AUC or Commission) issued its final decision regarding the Court of Appeal’s direction to re-examine the treatment of Distribution Facility Owner (DFO) payments under the Alberta Electric System Operator (AESO) tariff customer contribution policy.



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Restructured Energy Market Design Update

The Alberta Electric System Operator (AESO) has released updated details on its restructured energy market (REM) design and is now seeking feedback from industry stakeholders to help finalize it. Once the design is finalized, the AESO will work with industry to develop the necessary independent system operator (ISO) rules and define system requirements for implementation.



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Final Decision on Interim Market Power Mitigation ISO Rules

In Proceedings 29093 and 29940, the Alberta Utilities Commission (AUC) issued its final decision on the Alberta Electric System Operator’s (AESO) application for amendments and additions to the Independent System Operator (ISO) rules, known collectively as the Interim Market Power Mitigation Rules.



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DFO Contribution in Aid of Construction Policy (CIAC) – Update

In proceeding 29006, ten participants submitted written arguments to the Alberta Utilities Commission (the Commission or AUC) following rounds of extensive information requests (IRs) and evidence. A virtual hearing for reply arguments is scheduled for April 23, 2025.



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AESO Rate DOS Application – Decision Details

In Decision 28989-D01-2024-002, The Alberta Utilities Commission (AUC or Commission) released its reasons for approving the  Alberta Electric System Operator (AESO) application to amend the Demand Opportunity Service Rate ( Rate DOS) back in 2024.



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Restructured Energy Market

The Alberta Electric System Operator (AESO) has held 6 sprint sessions as part of their multi-phase engagement with industry stakeholders on the new energy market design.



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Expedited Approval of Interim Market Power Mitigation Rules

In proceeding 29093 market participants submit arguments and reply arguments in support of their request to the Alberta Utilities Commission (The Commission or AUC) that the AUC not approve Section 206.2 of the new Rules and direct the Alberta Electric System Operator (AESO) to amend this section.



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AESO Rate DOS Application – AUC Decision

In Proceeding 28989, The Alberta Utilities Commission (The Commission or AUC) approved the Alberta Electric System Operator’s (AESO) application to update its Rate Demand Opportunity Service (DOS), with reasons to follow.



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