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    • Electricity
      • AEMO operates Australia's National Electricity Market (NEM), the interconnected power system in Australia’s eastern and south-eastern seaboard, and the Wholesale Electricity Market (WEM) and power system in Western Australia.
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      • AEMO operates gas retail markets in New South Wales and the Australian Capital Territory, Queensland, South Australia, Victoria, and Western Australia. AEMO also operates wholesale gas markets in south-eastern Australia, those being the Declared Wholesale Gas Market in Victoria (DWGM), the Short Term Trading Market in Adelaide, Brisbane and Sydney (STTM), and the Gas Supply Hub (GSH), whose trading locations are based at Wallumbilla in Queensland, and Moomba in South Australia. AEMO also operates the Natural Gas Services Bulletin Board (GBB), and is system operator of the Victorian Gas Declared Transmission System. AEMO is also responsible for Gas Services Information functions in Western Australia.
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  • Security and reliability

  • In this section
    • In this section
      Summer operations report 2017-18
      Future Power System Security Program - reports and analysis
      Power system operation
      • Schedules for Delegations
      Ancillary services
      • Ancillary services causer pays contribution factors
      • Network support and control ancillary services procedures and guidelines
      • System restart ancillary services guideline
      • Market ancillary services specification and FCAS verification tool
      • Regional benefit ancillary services procedure
      • Frequency and time deviation monitoring
      Dispatch information
      • Policy and process documentation
      • VAr dispatch
      Congestion information resource
      • Limits advice
      • Network status and capability
      • Related resources
      • Statistical reporting streams
      Demand response mechanism
      Generator performance standards
      Loss factors and regional boundaries
      • Distribution loss factors for the 2018-19 Financial Year
      • Distribution loss factors for the 2017-18 Financial Year
      • Distribution loss factors for the 2016-17 Financial Year
      • Distribution loss factors for the 2015-16 financial year
      • List of regional boundaries and marginal loss factors
      Optional firm access
      Technical advisory group
      System Strength Impact Assessment Guidelines
  •  

    The NEM, like power systems worldwide, is being transformed from a system dominated by large thermal power stations, to a system including a multitude of power generation resources and technologies of various sizes. At the same time, customers are engaging with their electricity supply in new ways.

    The energy transformation involves a shift from:

    • Homogenous to diverse supply resources.
    • Synchronous to non-synchronous generation.
    • A centralised to a decentralised system
    • Passive to active consumers.

    Each of these trends acts to increase the variability of the power system. AEMO’s challenge is to continually meet the needs of the power system, in the face of major structural changes and the resulting uncertainty across investment and operational timeframes.

    While the power system is being transformed, the laws of physics that determine electrical flows do not change. This Power System Requirements paper outlines the interdependent technical and operational needs which must be met at all times to maintain a secure and reliable system.

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