RIIO-T1 Financial Model (Electric)

Overview

The RIIO-ET1 Price Control Financial Model (‘PCFM’) is used to calculate values for the Base Revenue (the term MOD) that appears in the formula for each licensee’s Base Transmission Network Revenue and  SO Opening Base Revenue. The calculations are carried out as part of the Annual Iteration Process for the PCFM.

Caveat: The PCFM is designed to produce values for the term MOD by recalculating base revenue figures using revised variable values.  It does not deal with the other components that count towards the licensee’s :

  • Maximum Revenue , as set out in Part B of Special Condition 3A
  • Maximum SO Internal Revenue, as set out in Special Condition 4A

of the Electricity Transmission Licence.  Therefore, the PCFM should not, by itself, be considered a comprehensive model of the allowed revenue position for the licensee.

Annual Iteration Process and functional changes to the PCFM

Each year the table of variable values within the PCFM is revised as part of the Annual Iteration Process in accordance with applicable methodologies contained in the Special Conditions of the Electricity Transmission Licence and the ET1 Price Control Financial Handbook.  Functional changes to the PCFM can only be made in accordance with the governance regime contained in Special Condition 5A of the licence.   Superseded versions of the PCFM are archived in these pages, but only the most recent version of the PCFM should be used for purposes that call for the most up to date position.

Below are the practical procedures for the Annual Iteration Process (AIP) that will take place by 30 November each year to calculate the value of MOD that will apply in Relevant Year which starts on the first of April the following year (for example the AIP in November 2013 calculates the value of MOD that will apply in the Relevant Year 2014/15).

Practical procedures for the Annual Iteration Process (AIP)

RIIO Electricity Transmission

The formal Annual Iteration Process is run by the Authority, but stakeholders can ‘dummy run’ the process for themselves by following the practical procedures below.

  1. In the 'Userinterface' sheet under the heading 'PCFM year t', select 31 March 2015, since the process will calculate the value of MOD to be applied in Relevant Year 2014/15.
  2. In the 'Userinterface' sheet under the heading 'Active Company' select the designator for the licensee.
  3. Update the PCFM Variable Values (‘blue box values’) on the Input Sheet for the designated licensee in accordance with revisions directed by the Authority - a consolidated direction of values will have been issued by the Authority by 30 November’.
  4. In the 'Userinterface' sheet under heading 'Model Status', select model status ‘Licence Model’.
  5. Repeat items  2-4 for other licensees as required, for example to obtain MOD values for other licensees within an ownership group.
  6. Press the ‘Run for All’ macro button (or alternatively the ‘Run for One button’ if only one licensee’s MOD value is being calculated).

The MOD value for each licensee will be recorded in the ‘SavedResults’ sheet for the Relevant Year 2014/15 under the heading ‘Recorded MOD’.

Publications and updates

  • Published: 27th Sep 2017
  • Decisions
  • 1 Associated documents
We have made non-signficiant modifications to the RIIO-ET1 PCFM. This will be the version of the PCFM for use in AIP 2017

  • Published: 13th Sep 2017
  • Decisions
  • 2 Associated documents
We have made non-significant modifications to the RIIO-ET1 PCFM. This will be the version of the PCFM for use in AIP 2017.

  • Published: 4th Aug 2017
  • Decisions
  • 3 Associated documents
Decision to modify the RIIO-T1 and RIIO GD1 PCFMs to account for the LMP refund and the National Grid voluntary deferral.

  • Published: 4th Aug 2017
  • Charts and data
  • 1 Associated documents
The ET1 PCFM following the NGET Deferral. Note this is not the final model for use in AIP 2017.

  • Published: 17th May 2017
  • Charts and data, Decisions
  • 3 Associated documents
The decision on modifications to the RIIO-ET1 and RIIO-GT1 PCFMs to incorporate the mid-period review.

  • Published: 17th May 2017
  • Charts and data
  • 1 Associated documents
The ET1 PCFM following the mid-period review. Note this is not the final model for use in AIP 2017.

  • Published: 22nd Mar 2017
  • Closed: 21st Apr 2017
  • Consultations and responses
  • 8 Associated documents
The Statutory Consultation on modifications to the RIIO-ET1 & RIIO-GT1 PCFMs to incorporate the mid-period review.

  • Published: 30th Nov 2016
  • Decisions
  • 1 Associated documents
This model calculates the Cost of Debt variable value for all four Price Controls for AIP 2016.

  • Published: 30th Nov 2016
  • Decisions
  • 1 Associated documents
This is the ET1 Price Control Financial Model following the completion of the Annual Iteration Process in November 2016.

  • Published: 5th Oct 2016
  • Guidance
  • 0 Associated documents
A summary of all modifications to the RIIO-ET1 Price Control Financial Model between the November 2015 Annual Iteration Process (AIP) and the model for use in AIP 2016.

Pages