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Grid Stability Overview
Real-time Data
Grid Stability Services Overview
This dashboard provides an overview of key grid stability services managed by National Grid ESO: Synchronous Compensators, Static Firm Frequency Response (SFFR), and Short Term Operating Reserve (STOR). These services together help maintain grid stability, regulate frequency, and provide backup power during periods of system stress.
What are Synchronous Compensators?
Synchronous compensators (also known as synchronous condensers) are devices that help maintain grid stability by providing inertia and reactive power. They help stabilize voltage, improve power factor, and provide fault current to protect the network during system disturbances. As the UK grid transitions to more renewable generation, these devices are becoming increasingly important for system stability.
What is Static Firm Frequency Response (SFFR)?
Static Firm Frequency Response (SFFR) is a service that provides a continuous power response when the system frequency deviates from 50Hz. SFFR providers must deliver their full contracted MW value within 10 seconds of a frequency deviation and sustain it for at least 30 minutes. These assets help to quickly stabilize frequency deviations and maintain grid security during disturbances.
What is Short Term Operating Reserve (STOR)?
Short Term Operating Reserve (STOR) is a service for the provision of additional active power from generation and/or demand reduction. STOR providers must be able to deliver within 20 minutes of notification from the National Grid ESO and sustain output for at least 2 hours. STOR helps to manage unforeseen increases in demand or unexpected generator outages.
What is the System Operating Plan (SOP)?
The System Operating Plan (SOP) provides a snapshot of the expected state of the electricity system for a specific future time point (Cardinal Point). It details forecasted demand, required reserves (positive and negative), planned generation output (Total Expected Output Level - TEOL), and potential minimum/maximum generation levels (Total Expected Minimum/Maximum Import/Export - TEMI/TEMX). It helps the ESO manage system balance and identify potential margin shortfalls or surpluses.
Data based on the latest available SOP record.
What are NESO EAC Auctions?
NESO (National Electricity System Operator) EAC (Enhanced Ancillary Services) Auctions are part of the grid services framework that procures various ancillary services to maintain grid stability. These auctions include products such as Dynamic Containment (DCH, DCL), Dynamic Moderation (DMH, DML), and Dynamic Regulation (DRH, DRL), which provide frequency response services at different response speeds and capabilities to help balance the grid during normal operation and frequency events.
Data is refreshed from the latest NESO EAC auction results.