ssen-d-documents

Scottish and Southern Electricity Networks (SSEN) operate the economically regulated electricity distribution and transmission networks across the north of the Central Belt of Scotland and also Central Southern England, delivering power to 3.7 million homes.

ssen

SSEN

The Flexibility Roadmap describes the tools we have available to support safe and efficient system operation. It sets out why and when we use flexibility across the full range of Flexibility Services, Access Products and Price Signals. 


Our Flexibility Roadmap

This document sets out our progress to date and the DSO outcomes we are already delivering for our customers and communities.


Our DSO Action Plan Year 1

This document is the methodology behind the first series
of Strategic Development Plans (SDPs) that detail the
future system needs to 2050 across both our higher
voltage networks and the lower voltage systems connecting homes and businesses. 

Strategic Development Plans - Methodology January 2025

This report focuses on the Port Ann and Carradale Grid Supply Points (GSPs). Our strategic development plans take the feedback we have received from stakeholders on their future energy needs through to 2050 and translate these requirements into strategic spatial plans of the future distribution network needs of the future.


Port Ann GSP and Carradale GSP - Strategic Development Plan - Draft for consultation

In this document you will find both context on our approach and content relating to the network supplied from our Ealing Grid Supply Point (GSP) in West London. 


Ealing GSP - Strategic Development Plan - Draft for consultation

This report aims to demonstrate how local, regional, and national targets align with stakeholder perspectives in the area, providing a robust evidence base for load growth through to 2050 across the Shetland Islands, currently supplied out of Lerwick power station (LPS).


Gremista Grid Supply Point (Shetland) - Strategic Development Plan - For Consultation

Our Strategic Development Plans provide a blueprint of long-term electricity system needs that allow us to work with other stakeholders to design and build the local markets and networks they need to decarbonise their power needs. 

Ealing GSP - Strategic Development Plan - November 2024

The goal of this report is to demonstrate how local, regional, and national targets link with other stakeholder 
views in the area to provide a robust evidence base for load growth out to 2050 across the North Hyde Grid 
Supply Point (GSP) area.


North Hyde Grid Supply Point - Strategic Development Plan - For consultation

This Strategic Development Plan summarises how local, regional, and national targets link with other stakeholder views in the area to provide a robust evidence base for load growth out to 2050 across the Ealing Grid Supply Point (GSP) area.

Fawley Grid Supply Point - Strategic Development Plan - January 2025

This document describes how Scottish & Southern Electricity Networks (SSEN) is collaborating with stakeholders through a more transparent and user-centric approach to the sharing of data and how we will work in partnership with stakeholders to support the development of local and regional net zero strategies.


SSEN DSO Collaboration Plan May 2024

The purpose of the DSO Advisory Board is to perform independent customer focussed scrutiny and challenge, critically assuring methodologies, decisions and approaches, and associated levels of transparency, that underpin the primary objectives at the heart of SSEN’s DSO strategy.

DSO Advisory Board

This report summarises the first areas that we have taken through our DNOA process.


SSEN DNOA Outcomes Report March 2024

This report summarises areas that we have taken through our DNOA process.

Q4 DNOA Outcomes Report

Our Digital Strategy shares the products and services all our different customer types can expect, how to share your opinion, and how to work with us. Our Digital Action Plan shares the progress we have made in delivering the products and services we have committed to in our Digital Strategy.

SSEN Digital Action Plan Dec 2024

This document sets out what we’ve achieved so far, and details what we plan to deliver next. We want to ensure we’re on track to support delivery of the new UK Government’s stretching Clean Power targets, and crucially we want to put our plans before you, so you can tell us what you think about them. 

DSO Action Plan Year 2

This report is the first in-depth analysis of community 
energy across SSEN’s licence areas, covering the north of Scotland and central southern England, and focuses on the progress made by the community energy sector in 2022 and 2023. This research provides insight into the current state of the community energy sector across SSEN’s region and enables us to better support and collaborate with community energy organisations to make sure they play a full role in the drive toward net zero.

Community Energy State of the Sector Report 2025

This Strategic Development Plan summarises how local, regional, and national targets link with other stakeholder views in the area to provide a robust evidence base for load growth out to 2050 across the Ealing Grid Supply Point (GSP) area.


Fawley Grid Supply Point-Strategic Development Plan

This document provides a detailed overview of the DNOA methodology and how it relates to our Net Zero Strategic Planning.


SSEN DNOA Methodology March 2024

The purpose of the NDP Methodology & Assumptions document is to ensure that the reports, forecasts, and calculations that make up the NDP are clear to the reader. It details the end-to-end network development process starting with forecasting to our best view development plan. 


SSEN Network Development Plan Methodology and Assumptions 2024

The purpose of the NDP Methodology & Assumptions document is to ensure that the reports, forecasts, and 
calculations that make up the NDP are clear to the reader.


Draft SSEN Distribution Network Development Plan Methodology and Assumptions 2024

This Report summarises key findings from independent assurance checks undertaken on a sample of DNOA outcomes taken from the DNOA Outcomes Report March 2024 published by SSEN Distribution. The scope relates to 6 DNOA outcomes with a project value above £2M (3 in SEPD and 3 in SHEPD). The conclusions from these checks have been reviewed by the DSO Advisory Board.

DNOA Assurance Report March 2024 v2

This report gives users access to information pertaining to our network plans for the next ten years in relation to our 11 kV networks and above, allowing all interested parties to better assess and identify the future opportunities to use and engage with us and the network.


Draft SSEN Distribution Network Development Report 2024

We published the UK’s first Operational Decision Making in March 2024 and are committed to continuously reviewing and improving it to ensure it delivers maximum value to our stakeholders. In November, we released our next iteration for consultation, marking a significant milestone and introducing new key considerations such as Flexibility Shortfall, Battery Dispatch, and wider ODM Governance — pioneering initiatives that have set the standard for other DSOs

DSO ODM Feedback

DNOA Methodology

Our SDP Summaries provide shorter, simpler, and less technical version of the detailed Strategic Development Plans (SDPs) we've produced over the past year. In our SEPD licence area we've produced Summary for each Grid Supply Point, while in the SHEPD licence area we've grouped by 132kV Supply Area

SEPD SDP Summaries

Our Strategic Development Plans (SDPs) take the feedback we have received from stakeholders on their future energy needs to 2050 and translate these requirements into strategic spatial plans of the future distribution network needs.


Cowley Grid Supply Point - Strategic Development Plan - For consultation

Our Digital Strategy is refreshed every 2 years and describes the digital products and services we will provide to the people we deliver services to and the people we work with, and how these benefit each individual. It also describes how we want to work with you to make them as valuable as possible. Our Digital Action Plan sits alongside our Digital strategy, which we update every 6 months.

Digital Strategy Action Plan June 2024

This report focuses on the Taynuilt Grid Supply Point (GSP), which supports the greater network around Loch 
Awe, Oban, and the Mull Archipelago. Our strategic development plans take the feedback we have received from stakeholders on their future energy needs through to 2050 and translate these requirements into strategic spatial plans of the future distribution network needs of the future.


Taynuilt GSP - Strategic Development Plan - Draft for consultation

This document sets out our Operational Decision Making (ODM) framework. ODM sets out the way in which we dispatch Distributed Energy Resources (DER) to meet short term capacity needs.

DSO ODM Framework Update - August 2024

Our SDP Summaries provide shorter, simpler, and less technical version of the detailed Strategic Development Plans (SDPs) we've produced over the past year. In our SEPD licence area we've produced Summary for each Grid Supply Point, while in the SHEPD licence area we've grouped by 132kV Supply Area.

SHEPD SDP Summaries

This document sets out how we will enhance our capabilities over time in order to deliver on our ambitions for DSO. 


DSO Capabilities Roadmap Final Report

SSEN DNOA Outcomes Report November 2024

In this report we provide further detail on both how we achieve transparency but also the role the wider DNO organisation plays within the process.


SSEN DNOA methodology 2025 Feb draft

Annual DSO report showing how our strategy is delivering  for customers and communities.


SSEN DSO Submission 2024

This is our second Distribution Networks Options Assessment (DNOA) outcomes report summarising around 40 assessments we have recently undertaken in both our north of Scotland and central southern England licence areas


SSEN DNOA Outcomes Reports July 2024

This document accompanies Scottish and Southern Electricity Networks (SSEN) Distribution draft Network 
Development Plan (NDP). Its purpose is to help stakeholders provide feedback on our draft NDP by providing an overview of consultation timescales and how you can respond.


SSEN Distribution Network Development Plan Consultation 2024

This document sets out our Operational Decision Making (ODM) framework. ODM sets out the way in which we dispatch Distributed Energy Resources (DER) to meet short term capacity needs.


Operational Decision-Making Framework - November 2024 Update

This document sets out our Operational Decision-Making (ODM) framework.  


SSEN ODM Framework 2024

In the report, we provide an overview of critical aspects that will shape our future network development and 
planning. This includes an analysis of the evolving demand and generation requirements, as well as the impacts on our electricity networks.


Thurso South GSP - Strategic Development Plan - Draft for Consultation

The purpose of the Distribution System Operation (DSO) Stakeholder Satisfaction Survey is to drive distribution network companies to become more responsive to the needs of DSO Stakeholders and improve service levels.

Avoiding Bias Methodology - DSO Stakeholder Survey

The DNOA Index provides a summary of all published DNOA outcome reports. The summary includes: the DNOA outcome of each individual report, the postcodes affected by the outcome, the relevant Strategic Development Plan (SDP) they are covered by, and a link to the corresponding DNOA quarterly publication.

DNOA Index

This document is the methodology behind the first series of Strategic Development Plans (SDPs) that detail the
future system needs to 2050 across both our higher voltage networks and the lower voltage systems connecting homes and businesses.


Strategic Development Plan Draft Methodology

This Report summarises key findings from independent assurance checks undertaken on a sample of DNOA outcomes taken from the DNOA Outcomes Report July 2024 published by SSEN Distribution. The scope relates to 9 DNOA outcomes with a project value above £2M (5 in SEPD and 4 in SHEPD). The conclusions from these checks have been reviewed by the DSO Advisory Board.

DNOA Assurance Report July 2024 V2

A report of SSEN DSO's performance against key performance indicators. 