Source: https://tendernation.io/opportunities/01a13bd9-ea71-7159-a951-6d2b56320c3e/eastern-green-link-4-ac-digital-models-study closed GB open procedure # Eastern Green Link 4 AC Digital Models Study [Scottish Power UK plc](https://tendernation.io/buyers/scottish-power-uk-plc) Estimated value Not stated Published 14 Apr 2026 Deadline Closed 11 Jun 2026 ## Who can bid - Open procedure Anyone can submit a full tender; there is no shortlisting stage. ## About this tender 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. Read full description ## CPV classification Feasibility study, advisory service, analysis Source Find a Tender (UK) · Notice ocds-h6vhtk-06751c-2026-04-14T10:12:20+01:00 [View official notice](https://www.find-tender.service.gov.uk/Notice/ocds-h6vhtk-06751c-2026-04-14T10:12:20+01:00) Never miss a tender like this again Get AI summaries, deadline alerts and a bid pipeline for tenders matched to your business. Free to start. [Track tenders free](https://tendernation.io/register) [Buyer profile Scottish Power UK plc: past awards and live tenders](https://tendernation.io/buyers/scottish-power-uk-plc) [Sector More Architecture, engineering & surveying tenders](https://tendernation.io/sectors/architecture-engineering-surveying) ## More tenders like this [Vacuum Pump Tritium Testing · UK Atomic Energy Authority · 29 days left · 16 Nov 2026](https://tendernation.io/opportunities/01a1464c-dd0c-72ed-b7bd-bac1e52155ab/vacuum-pump-tritium-testing) [Mechanical and Electrical Consultant Tender · University Hospitals of North Midlands NHS Trust · 36 days left · 23 Nov 2026](https://tendernation.io/opportunities/01a145df-0fba-7085-98fc-1c9389531130/mechanical-and-electrical-consultant-tender) [Asbestos Surveys · Northamptonshire Partnership Homes · 26 days left · 13 Nov 2026](https://tendernation.io/opportunities/01a14571-3963-732e-a081-bef649a3206b/asbestos-surveys) [Design Lead for Christchurch Learning Centre School Satellite · Bournemouth, Christchurch and Poole Council · 30 days left · 17 Nov 2026](https://tendernation.io/opportunities/01a14503-59e7-72ad-900a-82eaae1a3048/design-lead-for-christchurch-learning-centre-school-satellite) [Penistone Station - Independent Assessor · Barnsley Metropolitan Borough Council · 25 days left · 12 Nov 2026](https://tendernation.io/opportunities/01a14495-7973-71c1-9c37-1ba8178069cf/penistone-station-independent-assessor) [CA18575 - RFQ 2026/42 - Conservation Engineer for St Paul's Church The Crag Cemetery Rostrevor · Newry, Mourne and Down District Council (NMD) · 26 days left · 13 Nov 2026](https://tendernation.io/opportunities/01a144b0-e0b5-70b1-a4eb-e5b6dc8d3bbe/ca18575-rfq-202642-conservation-engineer-for-st-pauls-church-the-crag-ceme)