National Grid - Keeping the lights on

National Grid - Keeping the lights on

National Grid / Keeping the lights on

National Grid sits at the centre of a vast electricity grid both in the UK and US, connecting millions of customers to their transmission and distribution networks delivering safe and reliable power to homes and businesses.
Lights energy 2


  • Our strategic supplier role throughout the RIIO-T1 Regulatory Period is testament to our ongoing development and investment in our people, technologies and systems to support National Grid on their journey in building a world leading, future energy system
  • We continue to apply our deep domain expertise and innovation in Operational Technology (OT)system integration to support National Grid in its implementation of digitalised and cyber secure control systems
  • Collaborating with National Grid, we support with the testing of standards and industry protocols for new and legacy systems
  • Ensuring resilience and security through the design and implementation of risk reduction and mitigation strategies, supporting legacy system upgrades and modifications through our dedicated test and simulation facility
  • Capula has been chosen as the supplier for the National Grid Deeside substation 400kV off-grid High Voltage Test Centre facility which provides an industry sandbox for complete functionality testing, validating and stress testing new technologies before implementation on the electricity network

Capula has been a strategic supplier to National Grid for substation automation and control systems for over 30 years.

Over the RIIO-T1 Regulatory Period, we are one of the largest suppliers of control systems, having upgraded and refurbished over 74 transmission substations.


Substation control systems across the UK network


Overhead electricity lines


Underground electricity cables


High pressure gas pipes


Capacity of interconnectors under construction or in operation

National Grid in numbers