WS1 - T D Process

Workstream 1 Products


2018 Products 

If you would like to learn more about the products planned for 2018, please refer to the Phase 2 Project Initiation Document. Alternatively, should you wish to be notified when new products are launched, please join the Open Networks mailing list by clicking here. 

Product 1: Investment Processes

Workstream 1, Product 1 seeks to enable a whole system approach utilising a range of investment and operability options across Transmission and Distribution.

RDP Learnings

This report documents the key learnings from these programmes most relevant to the investment planning process and which can be explored further through the case studies being delivered through Workstream 1 Product 1 of the ENA Open Networks project.

2018 Report Outlining Methodology and Processes

The report is the main output for Energy Networks Association (ENA) Open Networks Workstream 1 Whole System Investment Planning Process (Product 1). Its main focus is on a short-term planning methodology and follows on from the work that was carried out in 2017 as part of Workstream 1 Product 3. The report presents the models and processes to enable distribution schemes to provide economic and efficient solutions in the short term, for issues faced by the Electricity System Operator (ESO) at a regional level.

Roadmap to 2020 and Beyond

This paper provides a summary of what has been achieved to date in developing and testing a whole system approach to investment planning and endeavours to provide a view to how it’s proposed to continue to evolve the methodology over time. To ensure that processes can be tested and refined in a controlled manner the Regional NOA methodology will continue to evolve through a staged approach.

Product 2: DER Services Procurement 

As part of the Open Networks Project’s Phase 2 plan for Work Stream 1 (T – D Processes), Product 2 (DER Services Procurement) seeks to develop the commercial principles and methodology to enable efficient access to services from Distributed Energy Resources (DER) to manage both transmission and distribution networks. 

DER Services Procurement - Review of Key Learnings 

Supporting Material

This report constitutes the first deliverable (2.1) of Product 2. It sets out relevant work previously undertaken; both within the ENA and externally, the key learnings of which will be used to inform the development of processes for the efficient procurement and use of DER services.

DER Services Procurement - End-to-End Process Description

This report sets out a high-level end-to-end process for the definition and procurement of DSO services to manage distribution network capacity, and other DSO operational issues. It is anticipated that this process will form the basis for a consistent approach by DSOs as they develop their capability to harness flexibility services to manage their networks.

Product 3: Industry Framework Interactions

Product 3: Schedule of GB Code Interations

Product 4: Reliability Standards & Emergency Requirements

This product looks to Ensure that emerging Whole System investment & operational processes maintain security of supply across T&D and cover requirements under emergency conditions.

Reliability Standards & Emergency Requirements (Product 4.1)

This document reviews the current versions of the distribution and transmission security planning standards and draws out the common elements between how these standards are approached. It also seeks to ensure any barriers to meeting whole system planning requirements are identified and outlines further development required to best facilitate planning across the transmission/distribution boundary. 

Product 4.2: Reliability Standards & Emergency Requirements

Within this report, any barriers to maximising the utilisation of existing infrastructure to benefit the whole system through increased use of flexibility have been identified and the planning aspects of whole system loss of infeed have been considered.

Whole System Operability Progress (Product 4.3)

This document sets out to describe a number of key actions being undertaken by Network and System operators within the UK which contribute to ensuring the security and resilience across the whole electricity system.

Product 5: Whole System FES

The Whole System Future Energy Scenarios (FES) product of the Open Networks Project’s Phase 2 plan for Workstream 1 (T–D Processes), seeks to establish a framework to facilitate the production of distribution level FES which are aligned to the GB FES produced by the GB System Operator (SO) in order to support whole system planning activities.

Whole System FES Report

This report details the evidence gathered from the DNOs on current forecasting approaches and draws some similarities and differences between the network companies’ approach to forecasting. The report goes on to consider options and propose a preferred option for DNOs, TOs and the SO to undertake a Whole System FES.

Review of Current Forecasting Approaches (Product 5.1)

This report details the evidence gathered from the DNOs on the current forecasting approaches and draws some similarities and differences between the network companies’ approach to forecasting. The outcomes from this exercise will inform further work under this Product 5 (Whole System FES).

Product 7: ANM Information

Product 7 looks to establish processes to capture ANM system status and performance for investment planning purposes. This work provides clear guidelines and methodology for assessing how stakeholders connection arrangements would be impacted by ANM arrangements.

Good Practice Guide for Curtailment Process and ANM reliability

This good practice guide considers both the methodology of how the DNOs should consider curtailment for Flexible Connections and which metrics should be considered while assessing installed Active Network Management systems.

Product 8: System Wide Resource Register

This product is reviewing the feasibility of putting in place a central resource register for GB generation, storage and flexible demand.

System Wide Resource Register - Review of Information Currently Available (Product 8.1)

This document aims to set out the different types of information that is currently available and published by the GBSO and DNOs for customers. Customers will often refer to this information in advance of seeking a connection to understand better the connection opportunities that exist across the network areas.
System Wide Resource Register - Identification of Potential Formats and Requirements (Product 8.2)
This document's objective is to describe the proposed form of the System Wide Resource Register that DNOs, IDNOs, TOs and the GBSO may offer to customers and other interested stakeholders. Customers have expressed the need for improved availability of information to support business planning & investment decisions along with more efficient procurement of services.
System Wide Resource Register - Feasiblity Report (Product 8.5)
The purpose of this report is to set out the work undertaken during 2018 and to summarise the proposed approach in the development of the System Wide Resource Register and to assess options for implementation.

Product 10 & 11: Facilitating Connections
This product's obective is to develop a Flexible Connections Guide and action plan for flexible resources in connection queues for medium to long term with the aim to publish it for stakeholders.
This document is our response to the feedback received from the Call for Evidence on Treatment of Flexibility in the connections queue. These slides summarise the key themes form the responses that we received and outline out next steps. For more information, please see out Public Consultations page.
Flexible Resources Connections Guide (Product 11.1)

This document presents a Flexible Resources Connections Guide to clarify the processes and products available today, covering topics raised through the associated call for evidence.

Product 12: TSO/DSO & DER Data 

In light of DSOTSO changes (Statement of works), this product's objective is to consider revisions to Week 24/42 processes and update minimum/ detailed data requirements to be provided from DER customers when they apply for a connection and after they agree a connection from the DNO.

Review of Key Learnings (Product 12.1)

Product 12.1 is a sub deliverable under this product that allows for review of previous key projects that could lead to changes in data exchanges or data requirements between TSO/DSO and DER’s (e.g. RDP’s and SOW).
Questionnaire Feedback Summary (Product 12.3)

Product 12.3 is aimed at a review of ongoing enforcement of existing requirements for data exchange primarily between DERs and DNOs.

Product 13: Operational Data & Control Architectures

As part of the Open Networks Project’s Phase 2 plan for Work Stream 1 (T – D Processes), Product 13 seeks to capture benefits/drawbacks of each market model (developed as part of WS1 P4 2017) in terms of accuracy, practicality, feasibility (including limits) and efficiency.

Review of Key Learnings (Product 13.2)

Product 13 will progress the delivery of trials for Model 3 (NETSO) and Model 4 (DSO) as part of existing RDP projects in WPD and UK Power Networks respectively. In addition to this, P13 will progress work on definition of Model 5: Joint Procurement and/or Dispatch. Product 13.1 captures the key learnings from industry to date.

Operational Data & Control Architectures: Interim Report

Since June 2018, the product team has progressed the delivery of the Regional Development Programmes (RPDs) in WPD’s and UKPN’s region to further develop the architectures and mechanisms for operational data exchanges through trialling NETSO and DSO managed approaches for assessing constraints. This interim report is capturing the work that has been done this year and outline next steps in 2019.


2017 Products

Product 1Key Learnings from trial projects

This report is part of the ENA Open Networks Workstream 1 – Product 1: Mapping current SO, TO and DNO processes. It seeks to capture important learnings from key projects developed by DNOs and the SO/TO.

Product 1: Mapping Current SO, TO and DNO Processes 

This report is the output of Product 1 from the ENA Open Networks Project working group / Workstream 1. It captures processes and data that underlie the DNO and SO/TO investment and operational planning as well as the interface between them. Process maps have been developed to improve the understanding of the given information.

Product 2: Gaps and Issues Report - Investment and Operational Planning

This report identifies and analyses gaps, issues and barriers in the current investment and operational planning processes and presents an action plan to address them.

Product 3: Investment Planning Model (Short Term) paper

This paper proposes an approach to whole system investment planning in the short term.

Product 5: Potential Whole System Operational Issues 

As the electricity system changes, moving to more active operation across all voltage levels, then some existing resilience functions may be affected. This report identifies at a high level some areas of whole system operability that need to be reassessed in light of future electricity system operation.

Product 5: Coordination in an Operational Timeframe

This report is part of the ENA Open Networks Workstream 1 – Product 5: Co-ordination in an
operational timeframe. This product aimed to identify key principles of operability on a TSODSO
basis irrespective of market model and to define the co-ordination activities required
across the T-D boundary to deliver whole system outcomes.

Product 5: Curtailment Assessment Process

This document describes trials of curtailment assessments embedded services performed with two DNOs, UKPN and WPD, with the aim of identifying a process for analysing the impact of ANM managed constraints on embedded SO services.

Product 7: Planning limits data template 

The Data Template sets out the information required by the SO/TOs from each DNO in order to undertake the necessary system studies which will determine planning limits at GSPs. A subset of this data will also form the basis of the data exchange between the DNOs, SO and TOs when managing DG contracted to connect under the new proposed process, the impact on the transmission system and the agreed planning limits.

Product 7: Statement of Works Customer Journey Maps

The Customer Journey maps set out the current SoW process along with the data exchange and process flows, together with the new proposed process which will establish planning limits at each DNO GSP, new contractual arrangements between the DNOs and SO and the resulting customer benefits. It should be noted however that the customer journey map reflects the process where a planning limit has been established. Where further studies are required in order to determine a new panning limit, this will require the DNO to submit a Modification Application to the GBSO.

Product 7: GSP Planning Limit Roll Out Programme 

The GSP Planning Limits Roll Out Programme sets out the plan which has been developed and agreed by all DNOs, TOs and the GBSO to establish Planning Limits across the Transmission/Distribution boundary, and ultimately deliver the transition away from Statement of Works when assessing the impact of Distributed Energy Resources on the transmission system. The programme will provide visibility to all interested stakeholders as to where current trials are in place and timescales for wider roll out across GB. Any questions on the programme should be directed to the particular DNO for the network area in question. The GBSO is currently developing their proposals for the associated CUSC (Connection & Use of System Code) Modification with a view of initial presentation at the January TCMF (Transmission Charging Methodologies Forum) and CUSC Panel Meetings.


Schedule of GB Code Interactions