840s McNeill Converter Operation (AB-SK Intertie) Update

ATCO Electric has updated their proposed repair schedule for the McNeill converter station’s component failure following the update from Nov. 13, 2024.

ATCO Electric is recommending that, except under emergency situations, McNeill not be utilized for energy flow until repairs can be completed. As such, the AB-SK intertie ATC will be posted as zero for both import and export during this period. The expected schedule for this operating condition is below. Please note that the schedule is subject to change as repairs are progressed.

• Jan. 15, 2025 (12:00 pm): McNeill available for emergency energy use only
• May 5, 2025 (12:00 pm): McNeill returned to normal operation

Further, ATCO Electric will be performing tests of the McNeill converter station on Jan. 15 that will affect the import (SK to AB) and export (AB to SK) flows on the Alberta - Saskatchewan intertie. The expected testing plan is given below but is subject to change as repairs are progressed. Please note that energy flows during the testing periods may be variable and change unexpectedly and the volumes given are meant to represent an expected range.

• Jan. 15, 2025 (10:00 to 11:00): 150 MW AB to SK
• Jan. 15, 2025 (11:00 to 12:00): 150 MW SK to AB

Should you have any questions, please contact Eric Viray, Manager – Operations Coordination, at ph: 403-705-5209.

• Market Participant Notification for the McNeill Converter Station [Posted: Dec. 10, 2024]