Edmonton to Calgary Transmission Reinforcement
As part of our commitment to stakeholders, the AESO provides regular updates on transmission projects underway within our jurisdiction. To provide timely and comprehensive information to stakeholders, this dedicated webpage will be updated as necessary throughout the construction of two high-voltage direct current transmission lines between the Edmonton and Calgary regions.
For historical background information on the Edmonton to Calgary Transmission Reinforcement please click here.
ATCO Electric Ltd. is the Transmission Facility Owner (TFO) responsible for building the east line (Eastern Alberta Transmission Line or EATL). ATCO Electric’s Facility Application which proposed a right-of-way for this line on the eastern side of the province, connecting the Heartland hub northeast of Edmonton to a southern hub in the Brooks area, was approved by the Alberta Utilities Commission (AUC) November 15, 2012.
AltaLink Management Ltd. is the Transmission Facility Owner (TFO) responsible for building the west line (Western Alberta Transmission Line or WATL). AltaLink’s Facility Application which proposed a right-of-way for this line in the west/centre portion of the province, connecting the existing Wabamun Lake hub west of Edmonton to the Calgary area hub near Langdon, was approved the AUC on December 6, 2012.
Careful coordination of outages during project construction is required to maintain reliable system operation and to minimize disruption to market participants. Stakeholders are reminded that over the lifespan of this complex project, information regarding operating limits, transmission line outages, and potential generator curtailments is subject to change. Participants are encouraged to keep apprised of the project status by checking this page, as well as the AESO’s two outage reports: Long Term Critical Outages and Approved Outages which can be found on the AESO website under Grid Operations > Outages.
Single line diagrams will also be published periodically throughout the project to provide a snapshot of the expected topology of the system based on information available at each stage.
EATL Transmission Construction Outages & Operating Limits
|
Transmission Line Outages |
Scheduled Start |
Scheduled End |
Total SOA Cut Plane Limit (MW) |
Comments |
|
System Normal |
Dec 2012 |
Dec 31, 2013 |
800 MW |
Based on system studies. Also refer to ISO Rule section 302.1 for curtailment protocol. |
| 933L (801s Anderson – 28s West Brooks) | June 8, 2013 08:00H |
June 9, 2013 18:00H Continuous |
620 MW | Based on system studies. Also refer to ISO Rule section 302.1 for curtailment protocol. |
| 935L (356s Milo – 324s Cassils) | July 6, 2013 08:00H |
July 7, 2013 18:00H Continuous |
800 MW | Based on system studies. Does not change the system normal operating limits. |
| 933L (801s Anderson – 28s West Brooks) | July 6, 2013 08:00H |
July 7, 2013 18:00H Continuous |
620 MW | Based on system studies. Also refer to ISO Rule section 302.1 for curtailment protocol. |
| 931L (132s Ware Junction – 28s West Brooks) | July 13, 2013 08:00H |
July 17, 2013 18:00H Continuous |
620 MW | Based on system studies. Also refer to ISO Rule section 302.1 for curtailment protocol. |
| 923L (356s Milo – 324s Cassils) | July 13, 2013 08:00H |
July 14, 2013 18:00H Continuous |
800 MW | Based on system studies. Does not change the system normal operating limits. |
| 9L59 (801s Anderson – 972s Tinchebray) | Aug 23, 2013 07:00H |
Aug 29, 2013 18:00H Continuous |
620 MW | Based on system studies. Also refer to ISO Rule section 302.1 for curtailment protocol. |
| 9L950 (801s Anderson – 132s Ware Junction) | Sept 1, 2013 07:00H |
Sept 7, 2013 19:00H Continuous |
620 MW | Based on system studies. Also refer to ISO Rule section 302.1 for curtailment protocol. |
| 923L (356s Milo – 324s Cassils) | Dec 7, 2013 08:00H |
Dec 8, 2013 18:00H Continuous |
800 MW | Based on system studies. Does not change the system normal operating limits. |
| 935L (356s Milo – 324s Cassils) | Dec 14, 2013 08:00H |
Dec 15, 2013 18:00H Continuous |
800 MW | Based on system studies. Does not change the system normal operating limits. |
Alberta Electric System Operator (AESO)
Effective May 31, 2013
WATL Transmission Construction Outages & Operating Limits
|
Transmission Line Outages |
Scheduled Start |
Scheduled End |
Total KEG Cut Plane Limit (MW) |
Comments |
|
System Normal (no KEG transmission elements out of service) and SOK flow less than or equal to 1850 MW OR BC-AB import less than or equal to 500 MW |
Fall 2011 |
Nov 30, 2013 |
2520 MW |
Based on system studies. Also, refer to expedited OPP-517 (AESO website) |
| System Normal (no KEG transmission elements out of service) and SOK flow greater than 1850 MW AND BC-AB import greater than 500 MW | Fall 2011 | Nov 30, 2013 | 2450 MW | Based on system studies. Also, refer to expedited OPP-517 (AESO website) |
Effective May 31, 2013
For further information contact:
Cam Bush
Manager - Operations Coordination
ph: 403-705-5204