ETYS archive | ESO

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

Here, you can access previous EYTS reports and appendices.

2022

Name
ETYS 2022 Boundary Charts Data
ETYS 2022 Appendix C
ETYS 2022 Appendix D - Fault Level Data Min
ETYS 2022 Appendix D - Fault Level Data Peak
ETYS 2022 Appendix I
ETYS 2022 Appendix D - Fault Level Narrative
ETYS 2022 Appendix H
ETYS 2022
ETYS 2022 Appendix G
ETYS 2022 Appendix F

2021

Name
ETYS Half-Year Update 2021
Appendix E – FES charts and workbook
ETYS 2021
Appendix B - System technical data 2021
Appendix I – Transmission losses 2021
Appendix H – Further information on inputs and methodologies 2021
Appendix D Fault Levels Peak 2021
Appendix D Fault Levels Minimum 2021
Appendix D – Fault levels Narrative 2021
Appendix C - Power flow diagrams 2021

2020

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

2019

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

2018

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

2017

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

2016

Name
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

Name
Appendix F Generation Data
Appendix G demand data
Appendix H Transmission Losses
ETYS 2015 for Web
Appendix A1 System Schematics
Appendix B System Technical Data
Appendix C Power Flow Diagrams
Appendix D1 Fault Level Intro
Appendix D Fault Level Data

2014

Name
ETYS 2014 Appendix F - Generation data
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

2013

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

2012

Name
Appendix D - Fault Levels
ETYS 2012 Document
Appendix C - Power Flow Diagrams
Chapter 4
Appendix B - System Data
Chapter 3
Appendix A4 - Accelerated Growth System Maps
Chapter 2
Appendix A3 - Gone Green System Maps
Appendix G - NDP Example

System Requirements Form

Name	Published
ETYS System Requirements Form 2021	9 Dec 2021
ETYS System Requirements Form 2020	23 Jun 2020
ETYS System Requirements Form 2019	31 Jul 2019