Understanding the Role of the Distribution Network Operator (DNO)

As the UK continues its transition toward a smarter, low-carbon energy future, the role of the Distribution Network Operator (DNO) has never been more critical. These operators are responsible for managing and maintaining the electrical distribution networks that deliver electricity from the National Grid’s transmission system to homes, businesses, and industrial sites across the country.

At Green Engineering, we work closely with DNOs to ensure all our projects — from 33kV and 132kV substations to complex cable route and EHV connections — are fully compliant with the latest technical standards and regulatory frameworks. Our engineers specialise in primary design, earthing, protection and control, and civil/structural design, ensuring safe, efficient, and future-proof network integration for both DNO and private client connections.

DNOs play a key role in enabling renewable energy connections and managing growing demand from electric vehicles, battery storage, and distributed generation. Their job is not only to maintain grid reliability but also to facilitate a smarter, more flexible energy system that supports the UK’s net-zero goals.

Green Engineering acts as a trusted partner to both Independent Connection Providers (ICPs) and DNOs, bridging the gap between customer requirements and utility standards. Our proven track record in grid code compliance, G99 design, and Lloyd’s Register-approved ICP works ensures that every project we deliver meets the stringent expectations of the local DNO and is approved for installation and construction.

Through innovation, experience, and engineering excellence, Green Engineering continues to support the UK’s critical energy infrastructure — delivering dependable, compliant, and sustainable power solutions across all voltage levels up to 400kV.