Fluence supplies real-time balancing control systems to UK grid

Business news |
By Nick Flaherty

Storage battery giant Fluence is supplying real time control systems to the UK’s National Grid.

The National Grid has been testing new types of frequency services to manage an island grid with limited interconnection with steep renewable targets and a gap between old nuclear plants being decommissioned and new ones coming online.

The National Grid has already announced plans to procure up to 1GW of bidirectional capacity to help stabilise the grid over the next few years with sub-second response times and advanced controls functionality.

Fluence has a full suite of dynamic frequency response capabilities that enable storage asset owners and operators to support the frequency reform efforts. Fluence OS, the fully integrated storage controls platform, has already been used in the Irish market and will enable developers and independent power producers in the National Grid market to participate in all three of the grid’s frequency response services.

The Pre-fault Dynamic Regulation has a response time of under 10s to gradually corrects smaller, continuous frequency deviations, while Dynamic Moderation with a response time under 1s helps resolve sudden, sizable supply and demand imbalances.

The Post-fault Dynamic Containment has 500-1000ms response time to keep frequency within +/-0.5Hz when it drifts outside operational limits of +/- 0.2Hz

Fluence OS includes integration with pre-tested metering and data outputs to support stringent reporting requirements and Fluence has successfully rolled out all three of these services for participation in auction.

To do so, the Fluence OS Market Dispatch Unit (MDU) uses embedded logic and application rules to constantly monitor frequency points, determining whether to resolve frequency deviations by pulling power from the grid or adding power to it based on a droop curve model.

During dispatches, Fluence OS automatically shifts baselines to manage the system’s state-of-charge, ensuring system longevity and maximum availability. These capabilities come pre-integrated into the Gridstack systems, avoiding the need for additional third-party hardware or software on top of existing storage infrastructure.

Operators of energy storage systems can configure the Fluence OS application’s parameters and stack multiple storage services on top of each other to capture the highest value in the market when existing grid services change.

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