Category: 📜 Rules, Policies & Processes
Complexity Level: ●●●●○ (Level 4 - Planning, Procurement, and Reliability)
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Long-term energy planning in Ontario aligns forecast demand, system reliability requirements, policy objectives, and infrastructure constraints over multi-year horizons.
The planning function is not a single document; it is an ongoing process that integrates:
Long-Term Energy Planning Framework
The set of analytical, institutional, and policy processes used to identify future electricity system needs and translate them into resource, infrastructure, and market actions.
⚡ Planning outcomes depend as much on uncertainty management as on central forecasts.
Fuel prices, weather patterns, electrification uptake, and technology costs can materially change the least-cost, reliable pathway.
Typical inputs include:
These assumptions are tested through scenario analysis rather than a single deterministic case.
Planning identifies expected supply-demand gaps and informs procurement design.
Potential response mechanisms include:
In Ontario, these activities are coordinated with the Independent Electricity System Operator (IESO) and policy direction from the Ministry of Energy.
Long-term planning must account for locational constraints, not only provincial energy balance.
Important considerations include:
This creates strong coupling between planning and topics such as Transmission System and Dispatch.
Consider a 10-year outlook with rapid electrification and tightening reserve margins.
This sequence links planning analytics to real procurement and infrastructure decisions.
➡ Next Topic:
Ontario Energy Board
The next topic covers how Ontario's regulator evaluates cost recovery, utility investment, and performance obligations tied to long-term planning outcomes.
Last Updated: 2026-03-26