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  • What are Reserve Services?

  • National Grid need to access to sources of extra power in the form of either generation or demand reduction, to be able to deal with unforeseen demand increase and/or generation unavailability. These additional power sources available to National Grid are referred to as Reserve and comprise synchronised and non-synchronised sources. Different sources require different timescales in order to be ready to deliver the services. In this section Reserve Services are listed on an increasing timescale of getting in the state of readiness as illustrated below.

    Reserve services Lead times

    • Balancing servicesFast Reserve

      Fast Reserve provides the rapid and reliable delivery of active power through an increased output from generation or a reduction in consumption from demand sources, following receipt of an electronic despatch instruction from National Grid.

    • Balancing servicesShort Term Operating Reserve

      Short Term Operating Reserve (STOR) is a service for the provision of additional active power from generation and/or demand reduction.

    • Balancing servicesBM Start-up

      The BM Start-up Service gives National Grid on-the-day access to additional generation BMUs that would not otherwise have run, and which could not be made available in Balancing Mechanism timescales.

    • Balancing servicesSTOR Runway

      STOR Runway is a contracting opportunity for Demand Side Providers to support the growth of new volume in to the STOR market.

    • Balancing servicesEnhanced Optional STOR

      This service is where National Grid has a requirement for provision of a volume of an Enhanced Optional STOR Service from non-BM Providers on a trial basis for this winter

    • Balancing servicesDemand Turn Up 

      Demand Turn Up has been developed to allow demand side providers to increase demand (either through shifting consumption or reducing embedded generation) as an economic solution to managing excess renewable generation when demand is low.