---
title: "Eastern Green Link 4 AC Digital Models Study"
ocid: "ocds-h6vhtk-06751c"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-06751c"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-06751c.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-06751c.json"
source: "Find A Tender Service"
current_stage: "Tender"
buyer: "SCOTTISH POWER UK PLC"
published: "2026-04-14"
---

# Eastern Green Link 4 AC Digital Models Study

Buyer: SCOTTISH POWER UK PLC  
Current stage: Tender  
OCID: ocds-h6vhtk-06751c

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## Summary

The Eastern Green Link 4 AC Digital Models Study is a planned procurement initiative led by Scottish Power UK PLC and National Grid Electricity Transmission PLC. It falls under the services category, specifically feasibility study and advisory services, and is guided by UKPGA legislation. The procurement process aims to appoint a Study Contractor to develop and integrate AC network models, testing the EGL4 HVDC Link's control systems. This procurement operates under an open procedure, with submissions open until 11 June 2026. The study will be conducted in the United Kingdom, with the contract period scheduled from 1 November 2026 to 1 March 2031. Key dates include the enquiry period ending on 24 April 2026 and the award period concluding on 18 June 2026.

This tender promotes business growth opportunities in consulting and engineering sectors, particularly for firms specialising in utility services and digital modelling. It invites businesses capable of fulfilling technical and economic criteria set out in the pre-qualification questionnaire. Offering an opportunity to engage in a long-term project, businesses possessing expertise in AC network modelling and HVDC systems are well-positioned to benefit from this contract. Access to proprietary software tools such as DIgSILENT PowerFactory and PSCAD is essential, and collaboration with third-party plant owners via Non-Disclosure Agreements further enriches the initiative's scope for innovative solutions.

## Notice

the Employer is looking to appoint a Study Contractor. The Study Contractor will in a First Stage, develop the AC network models, and in a Second Stage, will work with an HVDC Contractor to test the EGL4 HVDC Link control system. Below is a brief description of the scope. In the First Stage, the Employer will provide the Study Contractor with AC network model information in DIgSILENT PowerFactory and PSCAD software. By March 2028, the Study Contractor shall: * Perform multi-infeed interaction factor (MIIF) and unit interaction factor (UIF) studies, identify the AC network nodes remote from the EGL4 converter stations which can be reduced to network equivalents, and prepare PowerFactory and PSCAD models of AC network as viewed from the EGL4 converter stations. * Replace confidential AC network plant models in PowerFactory and PSCAD networks with generic plant models. The generic plant models shall be designed and parameterised to replicate the confidential plant model performance, and this will be evidenced by a validation report for the approval of both the Employer and the HVDC Contractor. * Be responsible for obtaining the Non-Disclosure Agreements where required from third-party plant owners. The HVDC Contractor will design and develop the EGL4 HVDC Link specific models, based on the AC network models containing equivalenced plant models received from the Study Contractor. The HVDC Contractor will then share the EGL4 HVDC Link specific models with the Study Contractor. In the Second Stage, the Study Contractor shall: * Test the EGL4 HVDC Link specific models after integrating them into the PowerFactory and PSCAD network models developed in the First Stage. * Work with the HVDC Contractor to resolve any further issues related to dynamic performance and tuning of the EGL4 HVDC Link control system.

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/033590-2026 |
| Notice type | UK12 - Procurement Termination Notice |
| Procurement type | Standard |
| Procurement category | Services |
| Procurement method | Open |
| Procurement method details | Open procedure |
| Tender suitability | Not specified |
| Awardee scale | Not specified |
| All stages | Planning, Tender |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 14 Apr 2026 |
| Submission deadline | 11 Jun 2026 |
| Future notice date | 5 May 2026 |
| Award date | Not specified |
| Contract period | 1 Nov 2026 - 1 Mar 2031 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | Not specified |
| Lots value | Not specified |
| Awards value | Not specified |
| Contracts value | Not specified |

## Status

| Field | Value |
| --- | --- |
| Tender status | Withdrawn |
| Lots status | Withdrawn |
| Awards status | Cancelled |
| Contracts status | Not specified |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | SCOTTISH POWER UK PLC |
| Additional buyers | Missing; NATIONAL GRID ELECTRICITY TRANSMISSION PLC |
| Locality | GLASGOW |
| Post town | Glasgow |
| Postcode | G2 5AD |
| Country | England |
| ITL 1 | TLI London |
| ITL 2 | TLI3 Inner London - West |
| ITL 3 | TLI35 Westminster and City of London |
| Local authority | Westminster |
| Electoral ward | St James's |
| Westminster constituency | Cities of London and Westminster |
| Delivery location | Not specified |

## CPV Codes

### Divisions

- 71 - Architectural, construction, engineering and inspection services

### Codes

- 71241000 - Feasibility study, advisory service, analysis

## Release History

- 14 Apr 2026 at 09:12 - TenderCancellation - UK12 - Procurement Termination Notice - https://www.find-tender.service.gov.uk/Notice/033590-2026
- 26 Mar 2026 at 13:14 - Planning - UK3 - Planned Procurement Notice - https://www.find-tender.service.gov.uk/Notice/027919-2026

## Documents

- https://www.find-tender.service.gov.uk/Notice/033590-2026
  14th April 2026 - Procurement termination notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/027919-2026
  26th March 2026 - Planned procurement notice on Find a Tender
- https://iberdrola.accounts.ondemand.com/saml2/idp/sso?sp=sp.accounts.sap.com&RelayState=https://iberdrola.accounts.ondemand.com/ui/protected/profilemanagement
- https://www.find-tender.service.gov.uk/Notice/Attachment/A-14016

## Notice URLs

- https://www.legislation.gov.uk/ukpga/2023/54/contents

## Provenance

This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-h6vhtk-06751c. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-06751c.json.