2009 Electric Transmission Systems Study
In 2009, Stantec was commissioned to do a study of current and future transmission technologies.
The study provides no recommendations.
It includes descriptions and conclusions on the following technologies:
- Conventional overhead high-voltage alternating current transmission;
- Underground high-voltage alternating current transmission;
- Combinations of overhead and underground high-voltage alternating current transmission;
- High-voltage direct current transmission (overhead and underground); and
- New and developing technologies.
They also reviewed;
- Power transmission capabilities and voltage levels;
- Length of transmission line or cable;
- Environmental concerns;
- Cost; and
- Reliability, efficiency, performance and operational features.
Assessment and Analysis of the State-Of-The Art Electric Transmission Systems with Specific Focus on Hig Voltage Direct Current (HVDC), Underground or other new or Developing Technologies Stantecconducted the study with support from AREVA and Power Delivery Consultants (PDC), and input from ABB and Siemens.
Transmission type conclusions from the study;
- Underground high-voltage transmission (alternating or direct current) has potential application in Alberta over short (less than 50 kilometres) distances. The study also specifies that this is only in areas where overhead transmission cannot be accommodated, such as in densely populated urban and commercial areas with limited right-of-way.
- High-voltage direct current (overhead HVDC) has a lower cost than comparable high-voltage alternating current for moving bulk power over longer distances. The study also indicates that HVDC might be the preferred option in cases where environmental concerns weigh heavily because of its reduced requirement for right-of-way.