ARUP has been appointed to SSEN Transmission’s power system modelling framework to support Scotland and the wider UK’s energy security and clean power targets.
Over the next decade, SSEN Transmission will upgrade the transmission network in the north of Scotland to enable the connection of up to 30GW of new renewable energy, to support the delivery of the UK Government’s renewable energy targets.
The framework agreement between Arup and SSEN Transmission, will provide specialist support for comprehensive power system studies, encompassing steady state, dynamic, and electromagnetic transient studies (EMT), and advanced and complex power system modelling including energy market modelling and probabilistic analysis.
Throughout duration of the framework, Arup will also work with SSEN Distribution to deliver power system modelling that informs connection of new distributed generation and demand, provides solutions for future network reinforcement with increasing decarbonised demand, and supports investment planning.
Arup secured seven lots – spanning transmission, distribution, dynamic analysis, probabilistic studies, EMT, flexible power systems, and de-risking power electronics. The firm will collaborate closely with SSEN Transmission to deliver resilient, future-ready grid infrastructure aligned with the UK’s clean power ambitions.
The comprehensive programme addresses uncertainties from multiple generation and demand scenarios through advanced power system modelling and probabilistic analysis, ensuring reliability and performance. The modelling also includes planning and designing the grid for new connections at transmission and distribution, and for the integration of the Accelerated Strategic Transmission Investment (ASTI) initiative.
As part of accelerated strategic transmission investment, SSEN Transmission is planning to deliver eleven projects as part of its £22bn+ electricity transmission investment programme. These projects include the reinforcement and upgrading of existing infrastructure, as well as the construction and installation of new substations, overhead lines and subsea cables, right across the north of Scotland.
The power system analysis work that will be undertaken through this framework will also support ongoing operational reliability, while flexible power system modelling will enable adaptation to evolving energy demands. These measures collectively ensure robust grid performance by understanding network behaviour and mitigating operability risks.
Charlotte Higgins, associate director – electricity networks at Arup, commented,“This appointment reflects our commitment to electricity system transformation as a key enabler of decarbonisation while also enhancing resilience, driving digital innovation, and delivering sustainable infrastructure across the energy sector. We are proud to be supporting SSEN Transmission in delivering an electricity system that is not only reliable and secure but also ready to meet the challenges of the UK’s net zero future.”
