Alberta ISO The Alberta Electric System Operator (AESO) brings together two former entities, the Power Pool of Alberta and the Transmission Administrator of Alberta. As an independent system operator, the Alberta Electric System Operator (AESO) leads the safe, reliable and economic operation and planning of Alberta’s interconnected power system. The AESO also facilitates Alberta’s hourly wholesale electricity market, which has more than 200 participants and $5 billion in annual energy transactions, and is accountable for the overall coordination of provincial load settlement.