Independent Electricity System Operator. Responsible for ensuring system reliability and the detailed design and implementation of the spot market. The IESO acts as a system controller, forecasting how much electricity will be needed and telling generators how much power they can send in, and when, to the province's transmission lines. The IESO also acts as the settlement agent for the wholesale spot market, collecting bills from distributors and direct consumers and paying generators and transmitters. Visit the web site...
Independent Electricity System Operator. This is another Ontario Hydro successor company. It's responsible for ensuring an adequate supply of power for the province, operating its electricity market, and ensuring the safety and reliability of the electricity grid.