- Back
- Who we are
- Electricity explained
- A net zero future
-
Industry information
- Back
- Home
- Industry information
- Connections
-
Balancing Services
- Back
- Industry information
- Balancing Services
- Future of balancing services
- Demand Flexibility Service
- Frequency response services
- Reserve services
- System security services
- Reactive power services
- Trading
- Settlements
- Local Constraint Market
- Balancing Mechanism Wider Access
- Electricity System Restoration Standard
- Power Responsive
- Balancing programme
- Single Markets Platform
-
Charging
- Back
- Industry information
- Charging
- Balancing Services Use of System (BSUoS) charges
- Transmission Network Use of System (TNUoS) charges
- Assistance for Areas with High Electricity Distribution Costs (AAHEDC)
- Connection charges
- Charging guidance
- Charging policy developments
- Charging statements
- Our consultation responses
-
Codes
- Back
- Industry information
- Codes
- Code changes: Beginner's Guide
- Connection and Use of System Code (CUSC)
- Grid Code (GC)
- System Operator Transmission Owner Code
- Security and Quality of Supply Standard (SQSS)
- Balancing Settlement Code (BSC)
- Digitalised Whole System Technical Code (WSTC)
- European Network Codes (ENC)
- About the Codes Team
- Industry Data and Reports
- Winter Operations
- Network Access Planning
- Our strategy
- Research & publications
ESO
GSR027: Review of the NETS SQSS Criteria for Frequency Control that drive reserve, response and inertia holding on the GB electricity system
This modification is required to address the specific actions from the Energy Emergency Executive Committee (E3C) and Ofgem final reports into the power outage of 9th August 2019 for the ESO to review, in consultation with industry, the NETS SQSS requirements that drive reserve, response and inertia holding on the GB electricity system.
Modification status: Concluded
Last updated: 29 November 2021
Code Administrator Contact: [email protected]
Governance Route: Standard
Impacts:
* High: National Grid ESO, Consumers (and consumer organisations)
Medium Impact: Generators, Interconnectors, Network Operators
* Low: Transmission Owner companies
Implemented: 1 April 2021