Charging

Users of the transmission system are subject to three types of transmission charges:

  • Connection charges
  • Transmission Network Use of System (TNUoS) charges
  • Balancing Services Use of System (BSUoS) charges.

Each type of charge is payable to National Grid Electricity Transmission plc (NGET) in its role as system operator. 

Connection charges

Connection charges recover the cost of providing and maintaining connection assets. NGET defines connection assets as those assets solely required to connect an individual user, eg a generator, to Britain’s transmission system, which are not and would not normally be used by another connected party. The costs of these assets are recovered directly from the user. These connection charges do not recover costs associated with assets that are shared (or could potentially be shared) by more than one user.

Transmission Network Use of System charges

Transmission Network Use of System (TNUoS) charges recover the cost of providing and maintaining shared (or potentially shared) electricity transmission assets, ie assets that cannot be solely attributed to a single user. TNUoS charges are recovered from all generation and demand users of Britain’s electricity transmission system. These charges vary by location, reflecting the costs that users impose on the transmission network to transport their electricity.

Balancing Services Use of System charges

Balancing Services Use of System (BSUoS) charges relate to the costs of the day-to-day operation of the transmission system. These costs primarily relate to the balancing of Britain’s electricity system and include the costs of constraining generation.

Charging methodologies and governance

In terms of charging, the design and maintenance of the relevant charging methodologies is enforced through licence conditions, which contain relevant objectives for the methodologies.

The charging methodologies used to derive the charges for connection to and use of the transmission system are administered by NGET in its role as system operator. These methodologies are contained in section 14 of the Connection and Use of System Code (CUSC) industry code. 

NGET has responsibility through its electricity transmission licence to ensure that these methodologies are kept up to date. As part of this it must bring forward modifications, where appropriate, that better meet the relevant objectives set out in their licence.  There are open governance arrangements that allow industry parties to propose modifications to these methodologies.

Industry assesses these proposals before submitting a recommendation to us. We make the final decision whether to implement any change. We do not set or approve the level of individual charges.

 

Publications and updates

  • Published: 3rd Oct 2014
  • Decisions
  • 1 Associated documents
We have rejected this modification to the Connection and Use of System Code (CUSC)

  • Published: 7th Aug 2014
  • Closed: 5th Sep 2014
  • Consultations and responses
  • 4 Associated documents
We are inviting views on proposed changes to Scottish Hydro-Electric Transmission plc (SHE Transmission) and SP Transmission plc’s (SPT) Statements of the Basis for Transmission Owner Charges.

  • Published: 14th Jul 2014
  • Closed: 13th Aug 2014
  • Consultations and responses
  • 13 Associated documents
We are consulting on the proposal to limit the total costs recovered from generators in Great Britain through TNUoS charges in a given year.

  • Published: 8th Nov 2013
  • Closed: 16th Jan 2014
  • Consultations and responses
  • 10 Associated documents
This document consults on the proposal to remove BSUoS charges from generators and recover all balancing costs from suppliers.

  • Published: 16th Aug 2013
  • Open letters and correspondence
  • 0 Associated documents
This letter sets out the basis for our decision to approve changes to the charging statement for SP Transmission Ltd (“SPT”).

  • Published: 16th Aug 2013
  • Open letters and correspondence
  • 0 Associated documents
This letter sets out the basis for our decision to approve changes to the charging statement for Scottish Hydro Electric Transmission plc (“SHE Transmission”).

  • Published: 7th Jun 2013
  • Closed: 8th Jul 2013
  • Consultations and responses
  • 5 Associated documents
Under their Electricity Licenses, SHET and SPTL are required to have a Statement setting out the basis upon which they will charge NGET for services provided. This letter seeks views on the proposed modifications.

  • Published: 11th Oct 2012
  • Closed: 9th Nov 2012
  • Consultations and responses
  • 1 Associated documents
A decision letter and statutory consultation to extend the discount for small transmission connected generators set out in Standard Licence Condition C13 until 31 March 2016.

  • Published: 18th Sep 2012
  • Decisions
  • 1 Associated documents
This letter sets out the Authority's decision in relation to CMP203.

  • Published: 25th Jul 2012
  • Closed: 5th Sep 2012
  • Consultations and responses
  • 10 Associated documents
Consultation on extending the discount for small transmission connected generators set out in Standard Licence Condition C13 beyond 31 March 2013.

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