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  • Electricity Transmission Operational Data

  • Welcome to the National Grid electricity operational information pages. As the UK electricity transmission system operator, National Grid carries out residual energy balancing to ensure that in every minute, the electricity demand matches the electricity received from generators. We also take system actions to ensure that there is sufficient capacity to ensure a safe flow of electricity through the network. Often, the system frequency is used as a measure of the state of balance of the system.
  • Real Time System Frequency


  • System Data


  • These pages provide information that supports the commercial operation of the electricity system. In the data explorer section you will find figures and graphs that show the forecast volumes and sometimes costs of the services we plan to use to carry out our balancing function. You will also find the volumes and costs of the outcome of our plans as they played out in reality.

    The report explorer section provides a one-stop shop to access the regular reports on ancillary services contracts and system performance. You will also find other reports that are not published on a regular basis but would have been prepared for events such as the operational forum.

    The section on methodologies, codes and principles provides access to the rules that govern generators, suppliers and network operators; guidance documents  that show how National Grid consistently values services. Methodologies explain how National Grid calculates and models relationships between figures.
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      Title:  Data Explorer
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      Figures and graphs showing the volume and cost of ancillary services
       
      Link to URL:   More information
      Figures and graphs showing the volume and cost of ancillary services

      More information
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      Title:  Report Explorer
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      Text:  
      Reports and presentations relating to electricity system operation
       
      Link to URL:   More information
      Reports and presentations relating to electricity system operation

      More information
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      Title:  Codes, Principles and Methodologies
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      Rules, guidance documents and explanation of calculated figures
       
      Link to URL:   More information
      Rules, guidance documents and explanation of calculated figures

      More information
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      Title:  Transmission License C16 Statements
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      Text:  
      Latest Versions of the Transmission License Condition C16 Statements
       
      Link to URL:   More Information
      Latest Versions of the Transmission License Condition C16 Statements

      More Information
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    Key Facts
     
     
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    *   - required fields  for narrow widget
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     Key Facts Narrow  Key Facts Wide
    Title: Balancing Act *  **
    Facts
     
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    Large Text: 300  *  **
    Unit:      Mw
    Simple Text: Demand-side services help to balance the system *  **
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    Balancing Act
    300 Mw
    Demand-side services help to balance the system
  • Further to data held on these electricity operational information pages, BMRS, SONAR and ELEXON Portal provide day to day transactional data for the UK electricity market. These pages do not intend to reproduce data already available on these partner websites.
    •  Elexon Portal  

       

      Historic data such as system prices and generation by fuel type

    • BM Reports

       

      Near real-time half-hourly data about the Balancing Mechanism

    • SONAR

       

      Bulletin board for National Grid operational notifications