The document discusses the changing electricity system in Australia and the challenges this poses for power system operations. Major drivers of change include policies around renewable energy targets and carbon pricing. This will result in new types of power plants, possible early retirements of coal plants, and changes to demand patterns. The operator, AEMO, is enhancing its operations planning process to look ahead two years and consider scenarios around potential changes in generation and demand. This aims to help AEMO identify trends and ensure operational practices can effectively manage the changing power system.