Overview of the Trans European Replacement Reserve Exchange (TERRE)

TERRE creates a European platform for trading reserve electricity with electricity transmission system operators in nine participating countries, including GB. 

The project will implement a new Replacement Reserve balancing product, which has been developed by a group of European Transmission System Operators (TSOs).

This will enable all TERRE participating Balancing Service Providers (BSPs) (defined as a market participant with reserve-providing groups able to provide balancing services to TSOs) to submit bids to National Grid on an hourly basis to fulfil 15 minute delivery periods.

Project TERRE will also remove all BSC barriers to customers and independent aggregators participating directly in the RR Market and in the existing BM thus enabling ‘Wider Access’.

The balancing product is required to fulfil requirements on TSOs from European legislation through the European Electricity Balancing Guideline (EB GL). Among other things, the EB GL requires those TSOs that use RR balancing products (balancing energy products with a >15 minute lead time) as part of their system balancing regime to implement and make operational a new European platform for the exchange of energy.

BSC Modification P344 and Grid Code Modification GC0097 will implement the TERRE product in the GB electricity market.

• Overview of P344 TERRE changes
• More on P344 ‘Project TERRE’
• More on P344 Implementation Guidance

See a comprehensive list of files, documents and pages that details the history and evolution of Wider Access and TERRE.

Earlier Releases

Details of Releases that have already delivered BSC changes for TERRE:

• TERRE Standalone Release
• Wider Access and TERRE (P344) Standalone Release page
• Feb 2019 BSC Release page Scope of release including P344 – Project TERRE implementation into GB market arrangements (Stage 1).
• Wider Access and TERRE (P344) BSC Release Circular: Feb 2019 Confirming the changes to BSC Systems, Code Subsidiary Documents (CSDs) and other Configurable Items (CIs) that we will implement for the February 2019 BSC Systems Release, including Wider Access and TERRE (P344) deliverables.
  ^{20 Feb 2019}
• Wider Access and TERRE (P344) Release Circular: Jan 2019 Further review of BSC Configurable Items amended for the Feb 2019 BSC Release.
  ^{15 Jan 2019}
• Wider Access and TERRE (P344) Release Circular: Nov 2018 Review of BSC Configurable Items amended for P344 as part of the Feb 2019 BSC Release – Batch 2.
  ^{2 Nov 2018}
• Wider Access and TERRE (P344) Release Circular: Oct 2018 Review of BSC Configurable Items amended for P344 as part of the Feb 2019 BSC Release – Batch 1.
  ^{18 Oct 2018}

Modifications and Change Proposals 

See Modifications  and Change Proposals that define the BSC changes for TERRE are:

• CP1517: Changes to BSC Configurable Items for the TERRE Final Implementation Date including National Grid ESO TERRE Derogation impact
• P386 Corrections to P344 legal text
• P380 Revision to Replacement Reserve Bid Data submission deadline requirements
• P344 Project TERRE implementation into GB market arrangements
• GC0097 Grid code processes supporting Project TERRE

Other areas of interest

Additional reading regarding TERRE:

• Testing Strategy: National Grid ESO published a joint testing approach and strategy in July 2020. This includes revised timescales for the joint plans for industry testing. 
  ^{17 July 2020}
• National Grid ESO: Wider Access and TERRE: an update for market participants
  ^{Dec 2018}
• Report: Industry review of Configurable Item changes to deliver the P344 solution
  ^{22 Nov 2018}
• Consultation Responses P344 Project TERRE implementation into GB market arrangements: Report Phase Consultation Responses
  ^{Jun 2018}
• BSC Panel Paper 277/06 Preliminary TERRE (P344) Implementation In Advance of Ofgem Decision (Rob Greenoak)
  ^{12 Apr 2018}
• Consultation Response: Replacement Reserves Implementation Framework
  ^{04 Apr 2018}
• BSC Panel Paper 270/09 Project TERRE Implementation Risks and Mitigation (Elliot Harper)
  ^{14 Sep 2017}
• P344 Workgroup paper Extending the P344 Solution to Allow the Settlement of Secondary BM Units using Metering at the Asset (John Lucas)
  ^{21 Feb 2017}
• P344 Interim Assessment Report Attachment B: Assumptions and Risks
  ^{Sep 2016}

Industry Working Groups

During the summer of 2018, five industry working groups met to develop the processes required to implement the provisions of Modification P344.

• P344 IWG 1
  Registration processes
• P344 IWG 2
  Allocation of SVA MSID to SBMUs
• P344 IWG 3
  Half hourly data aggregator processes
• P344 IWG 4
  Virtual lead party processes
• P344 IWG 5
  Performance Assurance Framework