Welcome to the Ontario Energy Sector Wiki.
This wiki helps participants in Ontario's electricity and natural gas sectors understand:
The content is designed to support both newcomers and experienced professionals.
New readers can start with the basic concepts, while experienced readers can explore deeper technical and institutional topics.
If you are new to the sector, begin with these foundational topics:
➡ Electricity System Overview
➡ Electricity Value Chain
➡ Supply and Demand
These pages explain the basic structure of the electricity system and how electricity flows from generation to consumers.
Learn how electricity moves through the power grid.
➡ Generation Types
➡ Transmission System
➡ Distribution System
These topics explain the infrastructure that produces and delivers electricity across the province.
Explore how electricity is scheduled, priced, and traded.
➡ Electricity Market Overview
➡ Dispatch
➡ Electricity Pricing
➡ Ancillary Services
➡ Energy Trading
These topics describe how electricity markets coordinate supply and demand.
Learn about the organizations that operate and regulate Ontario’s electricity system.
➡ Independent Electricity System Operator (IESO)
➡ Ontario Energy Board (OEB)
➡ Ministry of Energy
These institutions collectively govern electricity markets, infrastructure, and policy.
Explore the organizations that produce, transport, and deliver electricity.
➡ Generators
➡ Transmitters
➡ Local Distribution Companies
➡ Energy Traders
Learn how Ontario's electricity sector is governed and planned.
➡ Market Rules and Governance
➡ Long-Term Energy Planning
These topics explain how policy direction, market rules, and planning processes shape long-term electricity outcomes.
Start here for Ontario natural gas fundamentals:
➡ Natural Gas System Overview
➡ Natural Gas Value Chain
➡ Gas Supply and Demand in Ontario
➡ Gas Storage and Deliverability
➡ Ontario Natural Gas Market Overview
➡ Natural Gas Pricing in Ontario
Use these static navigation pages to access all Basic and Advanced topics by subject area.
➡ Foundations Navigation
➡ Markets & Operations Navigation
➡ Organizations Navigation
➡ Rules, Policies and Processes Navigation
Natural gas-specific navigation pages:
➡ Natural Gas Foundations Navigation
➡ Natural Gas Markets & Operations Navigation
➡ Natural Gas Organizations Navigation
➡ Natural Gas Rules, Policies and Processes Navigation
➡ Ontario Transmission System Map
➡ Ontario MRP 2025 Energy Trade Examples
➡ Ontario Natural Gas Bill Components
➡ Ontario Winter Gas Deliverability Example
These reference pages provide both system geography and practical market examples under Ontario's renewed market design.
Most topics include:
You can explore topics in sequence or navigate directly to areas of interest.
Ontario's energy sector is a complex system involving:
This wiki provides a structured reference to help participants understand how these components interact.
Last Updated: 2026-03-28