IESO
Independent Electricity System Operator
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The IESO ensures the reliability of the province’s power system, balancing the supply of and demand for electricity on a second-by-second basis and directing its flow across high-voltage transmission lines so it’s available to Ontarians when and where they need it. Ensuring there is enough energy to meet demand 24 hours a day, 7 days a week, is highly complex and requires close coordination of the many parts that make up the system. These include generators, transmitters and distributors who own and maintain the lines through which the electricity travels, and electricity consumers of all sizes.
