Load Shed Services for imports
Load Shed Services for imports (LSSi) is a transmission system reliability product developed as part of our efforts to fulfill our intertie restoration obligation as mandated by legislation. LSSi is provided by load customers that agree to be quickly taken offline following the sudden loss of imports coming across the interties.
This load shedding allows for arrest and recovery from frequency decay, and preserves system stability. LSSi is used to manage frequency risk so import intertie capability can be increased, allowing additional scheduled imports to access the Alberta market without compromising system reliability.
- ISO rule 303.1 on Load Shed service
- ISO rule 202.2 on short-term adequacy and supply shortfall
- ISO rule 502.8 on SCADA technical and operating requirements
- Force Majeure and Forced Outage Submission Form
On May 1, 2018 the AESO posted a Request for Expressions of Interest (REOI) to procure LSSi for 2019 and subsequent years. The purpose of the REOI was to assist the AESO in identifying interested parties, and to provide key details related to the Request for Proposals (RFP) stage of the competition and the accompanying Import Load Shed Agreement. Additionally, the AESO hosted an LSSi information session on May 8, 2018 for interested parties.
On June 1, 2018 the AESO opened the RFP stage for a contract term beginning January 2019 through to the end of 2021. The RFP attracted competitive interest and the AESO has subsequently contracted 330 MW of LSSi from seven successful proponents:
- Slave Lake Pulp, a division of West Fraser Mills Ltd.
- URICA Energy Real Time Ltd.
- Millar Western Forest Products Ltd.
- ERCO Worldwide, a division of Superior Plus LP
- Ranger Board, a division of West Fraser Mills Ltd.
- Alberta Newsprint Company
- Alberta-Pacific Forest Industries Inc.
The LSSi procurement was overseen by a Fairness Advisor at every stage to ensure the competition was administered in a fair and transparent manner, and adhered to all confidentiality requirements, policies and guidelines. To read the Fairness Advisor’s report for the LSSi procurement, please click here.
We will continue to evaluate the need for, and timing of, reliability services such as LSSi and we will ensure the energy and ancillary services markets operate together to deliver a reliable, efficient and cost-effective electricity system.