national-underground-asset-register

National Underground Asset Register

generation-and-network-availability-maps

SEPD and SHEPD Licence Areas

network-capacity

Network Capacity

network-flexibility

Network Flexibility

Creative Commons Attribution 4.0

generation-availability-and-network-capacity

We are the electricity Distribution Network Operator (DNO) responsible for delivering power to over 3.8 million homes and businesses across central southern England and the north of Scotland. We serve some of the most diverse and unique geographies across the UK, and keep customers and communities connected whilst developing the flexible electricity network vital to achieving net zero.

Our skilled teams are based right across the regions we serve, from the bustle of West London to the smallest villages in the Highlands and Islands of Scotland.  They are supported by engineering and customer service teams based in major offices and depots in centres like Reading, Portsmouth, Perth and Inverness.

ssen-distribution

SSEN Distribution

Generation Availability and Contracted demand map for both north and south giving the constraint level for GSPs and BSPs. Our map provides an indication of the networks capability to connect large-scale developments to major substations. The data is updated monthly.

Generation Availability and Network Capacity Maps

Generation Heat Map. The heat map for both our network regions provides Grid Supply Point (GSP) details, GSP and substation transformer ratings, Fault level information, and contracted and quoted generation projects at each GSP.

SEPD Generation Heat Map Update - September 2023

SEPD Demand Heat Map Update - September 2023.
The Demand Heat Map provides information on ongoing constraints and reinforcement works against GSP, BSP and Primary substations, and projects for new demand both contracted and quoted.

SEPD Demand Heat Map Update - September 2023

The Demand Heat Map provides information on ongoing constraints and reinforcement works against GSP, BSP and Primary substations, and projects for new demand both contracted and quoted.

Scotland Demand Heat Map August 2023

Shetland Demand Heat Map August 2023

The Availability heat map for Scotland provides Grid Supply Point (GSP) details, GSP and substation transformer ratings, Fault level information, and contracted and quoted generation projects at each GSP.

Availability Map Scotland August 2023

The Availability heat map for Shetland provides Grid Supply Point (GSP) details, GSP and substation transformer ratings, Fault level information, and contracted and quoted generation projects at each GSP.

Availability Map Shetland August 2023

A list of the data items presented via the Generation Availability Maps.

Generation Availability Map Attributes

A list of the data items presented via the Network Capacity Maps.

Network Capacity Map Attributes

Scotland Demand Heat map- External Data Triage

Scotland Generation Availability- External Data Triage

SEPD-Demand Heatmap- External Data Triage

SEPD-Generation Heatmap- External Data Triage

Shetland Demand Heat map- External Data Triage

Shetland Generation Availability - External Data Triage

SEPD Demand Heat Map Update - February 2024. The Demand Heat Map provides information on ongoing constraints and reinforcement works against GSP, BSP and Primary substations, and projects for new demand both contracted and quoted.

SEPD Demand Heat Map Update - February 2024

SEPD Generation Heat Map. The heat map for both our network regions provides Grid Supply Point (GSP) details, GSP and substation transformer ratings, Fault level information, and contracted and quoted generation projects at each GSP.

SEPD Generation Heat Map Update - February 2024

Generation Availability and Network Capacity

Generation and Network Availability Maps

near-real-time-data-access-portal

asset-management

Asset Management

sepd_long_term_development_statement

Southern Electric Power Distribution Long Term Development Statement Part 1 and 2 issued May 2024

SEPD Long Term Development Statement part 1 & 2 May 2024

Southern Electric Power Distribution Long Term Development Statement Tables Issued May 2024

SEPD LTDS Tables May 2024

SEPD Long Term Development Statement Part 1 - May 2023

SEPD Long Term Development Statement Part 1 and 2 issued May 2023

SEPD Long Term Development Statement Part 1 and 2

SEPD Long Term Development Statement Schematic Diagrams issued Nov 2022

SEPD LTDS 132 and 33 kV Geographic Map issued Nov 2022

SEPD LTDS 66 and 22 kV Geographic Map issued Nov 2022

Southern Electric Power Distribution Long Term Development Statement tables issued May 2023, containing: circuit data, transformer data, demand data, 132kV fault level, 66-6.6kV fault level, generation, interest in connection, and busbar names lookup.

Southern Electric Power Distribution long term development statement tables May 2023

SSEN Data Triage record for SEPD Long Term Development Statement

Long Term Development Statement Data Definitions and explanations for the various components of the dataset

Long Term Development Statement Data Definitions

Southern Electric Power Distribution Long Term Development Statement part 1 and 2 issued November 23

SEPD LTDS Part 1&2 Nov 23

SEPD LTDS 66 & 22kV Geographical Map issued November 23

SEPD LTDS 66 & 22kV Geographic Map Nov 23

Southern Electric Power Distribution Schematic Diagrams issued November 2023

SEPD LTDS Schematic Diagrams Nov 23

Southern Electric Power Distribution Map Issued November 2023

SEPD LTDS 132&33kV Geographic Map Nov 23

Southern Electric Power Distribution Long Term Development Statement Tables Issued November 2023

SEPD LTDS Tables Nov 23

Southern Electric Power Distribution Map Issued November 2024

SEPD LTDS 132 and 33 kV Geographic Map Nov 24

SEPD LTDS 66 and 22 kV Geographic Map issued Nov 2024

SEPD LTDS 66 and 22 kV Geographic Map Nov 24

Southern Electric Power Distribution Long Term Development Statement Part 1 and 2 issued November 2024

Southern Electric Power Distribution long term development statement part 1 & 2 Nov 2024

SEPD Long Term Development Statement Schematic Diagrams issued Nov 2024

Southern Electric Power Distribution long term development statement schematic diagrams Nov 24

Southern Electric Power Distribution Long Term Development Statement Tables Issued November 2024

Southern  Electric Power Distribution long term development statement tables Nov 24

The data sharing team have facilitated a data surgery with the Long Term Development Statement (LTDS) data assets that are available on SSEN Distributions Data Portal. This session was recorded to ensure that all of our users have an opportunity to engage with our data surgery. This session had a focus on bringing awareness to the LTDS and performing a deep dive into this data with clarity on future enhancements.


The Recordings have been split into two videos:


Part 1- Focus on explaining the LTDS

Part 2- Future plans with the CIM format


If there are any questions please reach out to the data@ssen.co.uk

LTDS Data Surgery Part 1 (26th February 2025)

LTDS Data Surgery Part 2 - CIM Formats (26th February 2025)

Outline of the purpose of the LTDS dataset. 

LTDS Purpose and Overview

A brief outline of the methodology used to develop the SEPD Long Term Development Statement. 

Methodology Statement - SEPD Long Term Development Statement

SEPD Long Term Development Statement

shepd_long_term_development_statement

Scottish Hydro Electric Power Distribution long term development statement part 1 & 2 issued May 2024

SHEPD Long Term Development Statement part 1 & 2 May 2024

Scottish Hydro Electric Power Distribution Long Term Development Statement Tables Issued May 2024

SHEPD LTDS Tables May 2024

Scottish Hydro Electric Power Distribution Statement Part 1 issued 31 May 2023

Scottish Hydro Electric Power Distribution Statement Part 1 May 2023

Scottish Hydro Electric Power Distribution Statement Parts 1 & 2 issued 31 May 2023

Scottish Hydro Electric Power Distribution Statement Parts 1 & 2 May 2023

Scottish Hydro Electric Power Distribution Long Term Development Statement Schematic Diagrams issued Nov 2022

Scottish Hydro Electric Power Distribution Long Term Development Statement Schematic Diagrams Nov 2022

Scottish Hydro Electric Power Distribution Long Term Development Statement Geographic Map 1 of 4 issued 29 Nov 2022

Scottish Hydro Electric Power Distribution Long Term Development Statement Geographic Map 1 of 4 Nov 2022

Scottish Hydro Electric Power Distribution Long Term Development Statement Geographic Map 4 of 4 issued 29 Nov 2022

Scottish Hydro Electric Power Distribution Long Term Development Statement Geographic Map 4 of 4 Nov 2022

Scottish Hydro Electric Power Distribution long term development statement tables issued 31 May 2023, containing: circuit data, transformer data, demand data, 132kV fault level, 66-6.6kV fault level, generation, interest in connection, and busbar names lookup.

Scottish Hydro Electric Power Distribution tables 1, 2, 3, 4, 5, 6 May 2023

Scottish Hydro Electric Power Distribution Long Term Development Statement Geographic Map 2 of 4

Scottish Hydro Electric Power Distribution Long Term Development Statement Geographic Map 3 of 4

SSEN Data Triage record for SHEPD Long Term Development Statement

Scottish Hydro Electric Power Distribution Statement Parts 1 & 2 issued November 2023

Scottish Hydro Electric Power Distribution Statements Part 1&2 Nov 23

Scottish Hydro Electric Power Distribution LTDS Part 1 Issued November 23

SHEPD LTDS Part 1 Nov 23

Scottish Hydro Electric Power Distribution LTDS Schematic Diagrams Issued November 2023

SHEPD LTDS Schematic Diagrams Nov 23

Scottish Hydro Electric Power Distribution Tables1,2,3,4,5,6 issued November 2023

SHEPD Tables 1,2,3,4,5,6

Scottish Hydro Electric Power Distribution LTDS Geographic Map 1 of 4 issued November 2023

SHEPD LTDS Geographic Map 1 of 4 Nov 23 

Scottish Hydro Electric Power Distribution LTDS Geographic Map 2 of 4 issued November 2023

SHEPD LTDS Geographic Map 2 of 4 Nov 23

Scottish Hydro Electric Power Distribution LTDS Geographic Map 3 of 4 issued November 2023

SHEPD LTDS Geographic Map 3 of 4 Nov 23

Scottish Hydro Electric Power Distribution LTDS Geographic Map 4 of 4 issued November 2023

SHEPD LTDS Geographic Map 4 of 4 Nov 23

Scottish Hydro Electric Power Distribution long term development statement part 1 & 2 issued November 2024

Scottish Hydro Electric Power Distribution long term development statement part 1 & 2 Nov 2024

Scottish Hydro Electric Power Distribution LTDS Geographic Map 1 of 4 issued November 2024

Scottish Hydro Electric Power Distribution Long Term Development Statement Geographic Map 1 of 4 Nov 24

Scottish Hydro Electric Power Distribution LTDS Geographic Map 2 of 4 issued November 2024

Scottish Hydro Electric Power Distribution Long Term Development Statement Geographic Map 2 of 4 Nov 24

Scottish Hydro Electric Power Distribution LTDS Geographic Map 3 of 4 issued November 2024

Scottish Hydro Electric Power Distribution Long Term Development Statement Geographic Map 3 of 4 Nov 24

Scottish Hydro Electric Power Distribution LTDS Geographic Map 4 of 4 issued November 2024

Scottish Hydro Electric Power Distribution Long Term Development Statement Geographic Map 4 of 4 Nov 24

Scottish Hydro Electric Power Distribution Long Term Development Statement Schematic Diagrams issued Nov 2024

Scottish Hydro Electric Power Distribution Long Term Development Statement Schematic Diagrams

Scottish Hydro Electric Power Distribution Tables 1-6 Nov 2024

 LTDS Data Surgery Part 1 (26th February 2025)

A brief outline of the methodology used to develop the SHEPD Long Term Development Statement.

Methodology Statement - SHEPD Long Term Development Statement

SHEPD Long Term Development Statement

nerda_opengrid_dashboard

Power flow information from our EHV, HV, and LV networks, taking in data from a number of sources.

Near Real-time Data Access (NeRDA) Portal

Portal Overview guide for the NeRDA Data Portal, May 2023.

NeRDA Portal Overview Guide

Data Definitions for the NeRDA Data Portal, May 2023.

NeRDA Data Definitions

Guide for how to access and use the API functionality for the NeRDA Data Portal, May 2023.

NeRDA API Guide

NeRDA Opengrid Dashboard

low_carbon_technologies

Regen Data used for projections of energy generation and storage by type, as well as installed capacity for each scenario. Visualisations, Licence Area Projections and 11kV dataset categorised by DNO licence area.

SEPD DFES 2023 Licence Area and 11Kv Datasets

SHEPD DFES 2023 -Licence Area and 11Kv Dataset

SEPD DFES 2022 - Licence Area and 11kv Datasets

SHEPD DFES 2022 - Licence Area and 11kv Datasets

EV Charger forecasts for the Consumer Transformation DFES scenario in the SEPD licence area FES2020

SEPD OA Consumer Transformation EV Charger FES2020.xlsx

HP forecasts for the Consumer Transformation DFES scenario in the SEPD licence area FES2020

SEPD OA Consumer Transformation HP FES2020.xlsx

EV Charger forecasts for the Leading the Way DFES scenario in the SEPD licence area FES2020

SEPD OA Leading the Way EV Charger FES2020.xlsx

HP forecasts for the Leading the Way DFES scenario in the SEPD licence area FES2020

SEPD OA Leading the Way HP FES2020.xlsx

EV Charger forecasts for the Steady Progression DFES scenario in the SEPD licence area FES2020

SEPD OA Steady Progression EV Charger_FES2020.xlsx

HP forecasts for the Steady Progression DFES scenario in the SEPD licence area FES2020

SEPD OA Steady Progression HP FES2020.xlsx

EV Charger forecasts for the System Transformation DFES scenario in the SEPD licence area FES2020

SEPD OA System Transformation EV Charger_FES2020.xlsx

HP forecasts for the System Transformation DFES scenario in the SEPD licence area FES2020

SEPD OA System Transformation HP FES2020.xlsx

EV Charger forecasts for the Consumer Transformation DFES scenario in the SHEPD licence area FES2020

SHEPD OA Consumer Transformation EV Charger FES2020.xlsx

HP forecasts for the Consumer Transformation DFES scenario in the SHEPD licence area FES2020

SHEPD OA Consumer Transformation HP FES2020.xlsx

EV Charger forecasts for the Leading the Way DFES scenario in the SHEPD licence area FES2020

SHEPD OA Leading the Way EV Charger FES2020.xlsx

HP forecasts for the Leading the Way DFES scenario in the SHEPD licence area FES2020

SHEPD OA Leading the Way HP FES2020.xlsx

EV Charger forecasts for the Steady Progression DFES scenario in the SHEPD licence area FES2020

SHEPD OA Steady Progression EV Charger FES2020.xlsx

HP forecasts for the Steady Progression DFES scenario in the SHEPD licence area FES2020

SHEPD OA Steady Progression HP FES2020.xlsx

EV Charger forecasts for the System Transformation DFES scenario in the SHEPD licence area FES2020

SHEPD OA System Transformation EV Charger FES2020.xlsx

HP forecasts for the System Transformation DFES scenario in the SHEPD licence area FES2020

SHEPD OA System Transformation HP FES2020.xlsx

SSEN Data Triage record for Low Carbon Technologies (DFES) projections to 2050

SSEN Data Triage record for Low Carbon Technologies (DFES)

A dictionary of the REGEN DFES Dataset Attributes with descriptions.

REGEN DFES Dataset Attributes

This report Outlines the results from the 2023 Distribution Future Energy Scenarios (DFES) 
analysis for Scottish and Southern Electricity Networks’ (SSEN) North of Scotland electricity 
distribution network licence area. The DFES analysis produces high granularity forecasts for 
the growth (or reduction) of energy generation, demand and storage technologies 
connecting to SSEN’s electricity distribution network

SSEN DFES 2023 Report- Results and Methodology (SHEPD)

This report outlines the results from the 2023 Distribution Future Energy Scenarios (DFES) 
analysis for Scottish and Southern Electricity Networks’ (SSEN) Southern England electricity 
distribution network licence area. The DFES analysis produces high granularity forecasts for 
the growth (or reduction) of energy generation, demand and storage technologies 
connecting to SSEN’s electricity distribution network.

SSEN DFES 2023 Report- Results and Methodology (SEPD)

Regen produces DFES (Distribution Future Energy Scenarios) projections for SSEN's Northern and Southern licence areas to forecast future energy generation, demand, and storage. This includes technologies such as EVs, heat pumps, and other low-carbon technologies (LCTs). The data provides an overview of forecasted growth, which SSEN uses to inform its network investment decisions.

Licence Area Projections and 11kV datasets are categorised by DNO licence areas, with a supplementary report available detailing the methodology and key influences behind the projections available on the website.

SSEN DFES 2024 – Results by Licence area and ESA

The report outlines the Distribution Future Energy Scenarios (DFES) 2024 for SSEN Distribution, focusing on the North of Scotland and Southern England licence areas. It aims to project future electricity generation, demand, and storage capacities to inform strategic network planning and investment decisions, supporting the transition to a net zero energy system. The updated projections reflect the new pathways outlined by FES in 2024, ensuring alignment with the latest energy transition strategies.

Showcases