North-South Transmission Reinforcement

Background

Increased demand for electricity in southern and central Alberta is stressing the existing 240 kV system and transmission reinforcement between the Edmonton and Calgary area is required. The Long-term Transmission Plan, identifies the need for two high voltage direct current (HVDC) lines between Edmonton and Calgary to address issues with reliability, maximize efficiency, accommodate long term growth and lead investment decisions. The project was approved in the Government of Alberta’s Electric Utilities Act.

ATCO Electric Ltd. is the Transmission Facility Owner (TFO) responsible for building the Eastern Alberta Transmission Line (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 Western Alberta Transmission Line (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.

Stakeholder Update – Eastern Alberta Transmission Line

The AESO advises commissioning activities to integrate EATL have begun and anticipates completion and the start of commercial operation for the EATL line to occur in late December 2015.

As per the AESO’s mandate to maintain reliable system operation and consistent with all new transmission system projects, the AESO has worked diligently with ATCO Electric, the Transmission Facilities Owner, to perform comprehensive engineering studies to determine the impacts to system operations during the commissioning period.

These studies have indicated that reliable operations will be maintained during commissioning and no adverse market issues are anticipated.

Letter to Stakeholders: Eastern Alberta Transmission Line

Stakeholder Update – Western Alberta Transmission Line

The AESO advises commissioning activities to integrate WATL will begin in late October, and anticipates completion and the start of commercial operation for the WATL line to occur in December 2015.

As per the AESO’s mandate to maintain reliable system operation and consistent with all new transmission system projects, the AESO has worked diligently with AltaLink, the Transmission Facilities Owner, to perform comprehensive engineering studies to determine the impacts to system operations during the commissioning period.

These studies have indicated that reliable operations will be maintained during commissioning and no adverse market impacts are anticipated.

Letter to Stakeholders: Western Alberta Transmission Line

Outage Coordination

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.

For further information contact:
Cam Bush
Manager - Operations Coordination
ph: 403-705-5204