Assumptions on Grid Upgrades

Different procurement programs could require different assumptions about grid upgrades. These assumptions are associated with how long the projects being tested will take to reach commercial operation. Transmission availability testing for projects with long lead times can take into account approved grid upgrades that will take longer to implement. For example, a waterpower project can take up to eight years to be in-service, compared with a FIT rooftop solar project, which can be in-service within 18 months.

Approved grid upgrades are generally considered when they have received all necessary approvals, which include Ontario Energy Board (OEB) approval to proceed. For example, the East-West Tie expansion project will not be considered until the “Leave to Construct” approval has been provided.