The AESO 2023 Reliability Requirements Roadmap(R3) defines three key areas of reliability — Frequency Stability, System Strength and Flexibility Capability — and includes descriptions of each issue, the degree of mitigation urgency, key findings from reliability assessments, and action plans. Implementation of action plans defined in the 2023 R3 is ongoing, and work has been initiated on the 2025 edition of the R3, which the AESO expects to publish in early Q3 2025.
The AESO 2023 Reliability Requirements Roadmap(R3) defines three key areas of reliability — Frequency Stability, System Strength and Flexibility Capability — and includes descriptions of each issue, the degree of mitigation urgency, key findings from reliability assessments, and action plans. Implementation of action plans defined in the 2023 R3 is ongoing, and work has been initiated on the 2025 edition of the R3, which the AESO expects to publish in early Q3 2025.
The AESO is seeking the participation of Legal Owners and Operators of Generating Facilitiesto help assess equipment limitations, protection settings, and risks associated with RoCoF events during system-wide frequency changes. Accurate data from all generating facilities is critical to defining these risks and ensuring the reliability of the Alberta Interconnected Electric System (AIES). The AESO previously requested participation in the survey in December 2024; however, due to limited response, we are again requested your prompt participation to enable the AESO to fulfill our mandate for system reliability.
Action Required
Complete all sections of the RoCoF survey form (available for download below, or under AESO Materials).
Submit one comprehensive form per organization, including all generators owned.
Provide the required data and records in accordance with ISO Rules, Section 503.21, Subsection 6(1) to 6(3).
Deadline
Submit the completed form/responses by June 21, 2025.
The AESO appreciates your continued cooperation and support in this important initiative. Your efforts contribute to the ongoing reliability of the provincial electricity system.
