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IESO: Ontario-Quebec Interconnection Capability technical review

from Independent Electricity System Operator

In October 2014, the Independent Electricity System Operator (IESO) and the Ontario Power Authority (OPA) (now merged) provided a report in response to a request from the Minister of Energy for a review of the opportunities and constraints that may exist on Ontario’s intertie connections to meet demand for electricity and support other reliability requirements of the power system. The report focused on the technical capabilities of the interties and the Ontario transmission system and also outlined possible infrastructure investments and market factors that could influence decisions on transactions between Ontario and Quebec. Ontario’s Deputy Minister of Energy has requested a technical update to the 2014 assessment, and that is the purpose of this document.

Building on the 2014 report, but using updated modeling and analysis, this report presents several cases in which expanding the eastern Ontario transmission system could enable Ontario to maximize the firm import capability of the existing tie lines with Quebec. The cases presented in this report reflect different options related to technology, complexity, timing and cost. more

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