Quiet upgrade in the grid, National Grid’s SmartValves push more power through existing lines
18.06.2026 - 02:57:16 | ad-hoc-news.de
Reviewed: ad hoc news Software & Services desk. Edited and checked on 2026-06-18, 02:55. Details in the imprint.
With the SmartValves technology from National Grid, the future of the power grid hides in gray roadside cabinets instead of new steel towers on the horizon. You hear only a quiet hum, but more wind and solar power slip through the same old lines.
Background on the National Grid stock
SmartValves sit in the middle of National Grid’s push to move more renewable power across Britain without building new lines everywhere.
What SmartValves actually do
SmartValves are modular power flow control devices that sit at substations and push more power down underused transmission lines, easing congestion on overloaded circuits without building new routes. Each unit dynamically adjusts the electrical impedance on a line so current rebalances across the network in real time.
The boxes look unglamorous - metal cabinets with heavy cables and cooling gear - but they house advanced power electronics and software that respond automatically to changing grid conditions. Operators see the impact on their control screens within seconds, even if the kit itself sits quietly at the edge of a field.
Why National Grid is rolling them out
National Grid has been deploying SmartValves on key bottlenecks in the UK transmission system to free up capacity for new offshore wind farms and solar parks. The company highlights them as part of its strategy to "build less and use existing assets better" where planning and community pressure slow new lines.
According to project descriptions, a single SmartValve installation can unlock hundreds of megawatts of extra transfer capacity on constrained corridors. That means more renewable power can move south from windy coasts on the cold days when Britain needs it most, without waiting years for new pylons.
How the technology feels in operation
For nearby residents, SmartValves are almost invisible compared with new overhead lines - they sit inside fenced compounds on existing substation land, with a low acoustic profile and no new towers cutting across fields. Engineers describe commissioning as closer to installing big industrial drives than a full line upgrade.
In the control room, the experience is very different. Operators get more levers to manage bottlenecks, seeing power flows rebalance as SmartValves change settings automatically, with alarms and limits integrated into familiar SCADA displays. The promise is flexibility without adding operational complexity at 3 a.m. on a stormy night.
Cost, benefits and limits
National Grid positions SmartValves as a way to deliver more capacity at lower cost and with fewer planning risks than building new circuits, especially in densely populated regions. The devices can be redeployed as the grid evolves, turning grid investment into something more modular and reusable.
There are limits, though. Power flow control cannot replace new lines everywhere, especially where demand and generation both rise sharply. SmartValves work best as a "capacity unlock" on existing corridors, buying time while larger reinforcement projects slowly move through consultation and permitting.
Where SmartValves are used so far
Early SmartValve projects on the UK network focus on congested paths linking renewable-heavy regions to major demand centers. Similar technology from the same technology partner is also being used internationally, from North America to Australia, confirming that the concept is mature grid equipment rather than lab tech.
Each site looks slightly different, but the pattern repeats: a row of power electronics modules, cooling equipment, and protection gear, typically added at the edge of an existing substation. For the grid planner, the important line is in the contingency studies - higher power transfer limits on key routes.
Context and stock reference
SmartValves sit inside National Grid plc’s wider push to digitalize and modernize its UK and US networks as more renewable and distributed generation connects. Shares of National Grid plc (ADR) (US6361801011) trade in New York on the NYSE in US dollars.
Key facts on SmartValves
- Product: SmartValves power flow control technology
- Manufacturer: National Grid plc (through deployment with technology partner)
- Category: Software and grid service solution
- Launch: First UK deployments announced in the early 2020s
- RRP / Price: Project-specific, not publicly listed
- Availability: Used on selected UK transmission corridors and similar projects abroad
- Target group: Transmission system planners and grid operators
- Highlight / USP: Unlocks extra grid capacity on existing lines without new towers
This article was AI-assisted and editorially reviewed. Product information without guarantee; prices and availability may change at short notice. No investment advice, no buy or sell recommendation. Stock-market transactions involve risks up to total loss.
