The LTDS CIM dataset provides a structured representation of
the Long-Term Development Statement (LTDS) using the Common Information Model
(CIM), enabling consistent data exchange and network modelling across
Distribution Network Operators (DNOs).
Developing on top of the Stage 1 Equipment profile, the Stage 2 publication is organised into three structured “cases”, each designed to support specific network planning and analysis activities.
1. Existing Fault Level Case
This case comprises the Equipment (EQ), Short Circuit (SC) and Short Circuit Results (SCR) profiles. The Existing Fault Level Case has been developed by enhancing the Stage 1 EQ model with updated short-circuit parameters, including (but not limited to) zero-sequence impedance values and circuit breaker make and break ratings. The SCR profile provides the calculated fault level results at each network node associated with a circuit breaker, supporting fault level assessment of the existing network.
2. Existing System Capacity Case
This case comprises the Equipment (EQ) and System Capacity (SYSCAP) profiles. The EQ profile represents the existing network equipment model, while the SYSCAP profile contains system capacity information, including firm capacity and actual non-coincident (outturn) demand. The System Capacity profile provides key network planning parameters used for capacity assessment and network analysis.
3. Future Year 1 System Capacity Case
The Future Year 1 System Capacity Case comprises the Equipment (EQ) and System Capacity (SYSCAP) profiles and represents a one-year-ahead view of the network. The EQ profile incorporates planned network development projects and generation/demand changes scheduled for completion up to Q2 2027, while the SYSCAP profile contains forecast system capacity information, including forecast non-coincident demand for the Year 1 planning horizon. This case supports the assessment of future network capacity requirements and system performance.
In the export tab you can find datasets designed to help identify assets between the LTDS CIM and Tabular formats.
The dataset is updated every May and November in line with
regulatory requirements and is intended to improve transparency,
interoperability, and stakeholder engagement across the energy sector.
Related Feature Pages
Embedded Capacity Register Page - Our Embedded Capacity Register provides information on generation and storage sites, both connected to and accepted to connect to our network.
Long-Term Development Statement (LTDS) Page - Our LTDS provides essential network and asset information required to carry out studies of the NPg network to access potential connection points.
Glossary of Terms
Our Glossary dataset provides definitions for various terms and acronyms found throughout our data. If the term you are searching for isn't in our list, please let us know via our Open Data team and we will get it added!
Data Governance
If you wish to view the data triage document for any dataset, they can be found in our Data Triage Assessment dataset.
This dataset DOES require a login to view
Any data caveats for the dataset are listed below
- None