Definitions for "IESO"
Independent Electricity System Operator. A not-for-profit corporation responsible for directing the operation and maintaining the reliability of the electric grid in Ontario, Canada
see Independent Electricity System Operator
Independent Electricity System Operator. One of Ontario Hydro's successor companies, formerly known as the Independent Electricity Market Operator (IMO), operates the electricity spot market and manages the electricity system. In some other jurisdictions, these two functions are split between a market operator and a system operator.