East Coast 400kV Reinforcement Project
Kintore, Fetteresso, Alyth, and Kincardine, Scotland (with corresponding works in SPEN's area near Blairingone) · 2022–2026 (Construction started 2022, completion scheduled for late 2026) [1] [2]
The judgement call
Account-gated at launchThe project adapted to an enhanced scope to deliver an additional 20% capacity uplift. Digital tools like ArcGIS Field Maps were used for site-specific pollution prevention and improved coordination. [1]
Key engineering challenges
Upgrading existing infrastructure while maintaining network integrity and minimizing disruption on a live network. [1] - Adapting to changes in conductor selection, requiring re-sequencing of works and rework of previously refurbished sections. [1] - Integrating increased transmission capability to support renewable energy integration across the network. [1] - Managing environmental impact and community engagement across a significant geographical area. [1]
Project facts
- Client / owner
- SSEN Transmission and SP Energy Networks
- Lead contractor
- Balfour Beatty (for overhead line upgrades) [1]
- Lead designers
- —
- Project type
- upgrade
- Scale
- Upgrade of existing 275kV overhead lines to 400kV; reinsulation and reconductoring of overhead lines; strengthening and upgrading foundations at selected towers; construction of two new 400kV substations (Tealing and Fiddes) and extending existing ones. [1] [3]
- Disciplines
- electrical; civil; structural; environmental; project management
- Standards & frameworks
- UK grid codes, Electricity Safety, Quality and Continuity Regulations 2002, relevant environmental regulations.
Sources: Balfour Beatty: East Coast OHL Scotland (https://www.balfourbeatty.com/what-we-do/projects/east-coast-ohl-scotland/) [1] - SSEN Transmission: East Coast 400kV OHL Upgrade (https://www.ssen-transmission.co.uk/projects/project-map/east-coast-400kv-ohl-upgrade/) [2] - Ofgem: Ofgem unlocks early investment for slew of fast-track clean power projects (https://www.ofgem.gov.uk/press-release/ofgem-unlocks-early-investment-slew-fast-track-clean-power-projects) [3] - Cable Technology News: SSEN Transmission launches East Coast 400kV Phase 2 Project (https://www.cabletechnologynews.co.uk/ssen-transmission-launches-east-coast-400kv-phase-2-project/) [4]