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Electricity Ten Year Statement (ETYS) Archive

We publish the ETYS annually in our role as the electricity system operator.

ETYS documents

Here, you can access previous EYTS reports and appendices.

2020

Name
Summary of the ETYS 2020
Appendix A – System Schematic and Geographic
Appendix B – System Network Data
Appendix C – Future Power Flows
Appendix D – Fault Level Narrative
Appendix D – Fault Level Data - Min
Appendix D – Fault Level Data - Peak
Appendix E – Spatial Transmission Level Data
Appendix H – Further Information in Inputs and Methodologies
Appendix I - Transmission Losses
ETYS System Requirements Form 2020
ETYS Half Year Update 2020
ETYS 2020 Structure
ETYS 2020 (Full Document)

2019

Name
Appendix A – System Schematic and Geographic
Appendix B – System Network Data
Appendix C – Future Power Flows
Appendix D – Fault Level Data - Min
Appendix D – Fault Level Data - Peak
Appendix D – Fault Level Narrative
Appendix E – Spatial Transmission Level Data
Appendix H – Further Information in Inputs and Methodologies
Appendix I - Transmission Losses
ETYS 2019

2018

Name Sort descending
Appendix A – System Schematic and Geographic
Appendix B – System Network Data
Appendix C – Future Power Flows
Appendix D – Fault Level Data
Appendix D – Fault Level Narrative
Appendix E – Spatial Distribution Level Data
Appendix E – Spatial Transmission Level Data
Appendix H – Further Information in Inputs and Methodologies
ETYS 2018
Half Year Update to ETYS 2018

2017

Name Sort descending
Appendix A - System Schematics and Geographic
Appendix B - System Network Data
Appendix C – Future Power Flows
Appendix D – Fault Level Data
Appendix D – Fault Level Narrative
Appendix E - Spatial Data Summary Narrative
Appendix E - Spatial Distribution Level Data
Appendix E - Spatial Transmission Level Data
ETYS 2017
ETYS 2017 Updated
Half Year Update to 2017 ETYS

2016

Name Sort descending
Half-year update to 2016 ETYS
ETYS 2016
ETYS 2016 Appendix A
ETYS 2016 Appendix B
ETYS 2016 Appendix C
ETYS 2016 Appendix D
ETYS 2016 Appendix D Data

2015

Published Sort ascending	Name
29 Apr 2016	Appendix A1 System Schematics
20 Apr 2016	Appendix B System Technical Data
8 Feb 2016	Appendix C Power Flow Diagrams
1 Feb 2016	Appendix D Fault Level Data
25 Jan 2016	Appendix D1 Fault Level Intro
15 Jan 2016	Appendix E Technology
1 Jan 2016	Appendix F Generation Data
1 Dec 2015	Appendix G demand data
30 Nov 2015	Appendix H Transmission Losses
30 Nov 2015	ETYS 2015 for Web

2014

Name Sort descending
ETYS 2014
ETYS 2014 Appendix A1_1 GB Power station map
ETYS 2014 Appendix A1_2 GB Existing Transmission System map
ETYS 2014 Appendix A1_3 to A1_6 - GB Existing Transmission System - Schematic
ETYS 2014 Appendix B - System data
ETYS 2014 Appendix C - Power Flow Diagram
ETYS 2014 Appendix D - Fault level data
ETYS 2014 Appendix E - Technology
ETYS 2014 Appendix F - Generation data

2013

Name Sort descending
Appendix A1 - Geographic System Maps
Appendix A2 - Schematic System Maps
Appendix B - System Data
Appendix C - Power Flow Diagrams
Appendix D - Fault Level Data
Appendix D - Fault Levels - Final
Appendix E - Technology
Appendix F - Generation Data
Electricity Ten Year Statement 2013
END ECMP team
Transmission Electricity Customer Service Team

2012

Name Sort descending
Appendix A1 - General System Maps
Appendix A2 - Slow Progression System Maps
Appendix A3 - Gone Green System Maps
Appendix A4 - Accelerated Growth System Maps
Appendix B - System Data
Appendix C - Power Flow Diagrams
Appendix D - Fault Levels
Appendix E - Technology
Appendix F - Generation Data
Appendix G - NDP Example
Chapter 2
Chapter 3
Chapter 4
ETYS 2012 Document

System Requirements Form

Name
ETYS System Requirements Form 2019
ETYS System Requirements Form 2020

Webinars

Name
ETYS Webinar 19 February 2020 slides