System Operation
Capabilities and methodologies
The core capabilities and strategic approaches for our gas network system are designed to ensure reliable supply, optimise operational efficiency and maintain safety and regulatory compliance.
By understanding our technical functions and strategic considerations, stakeholders and operators can better use the network’s capabilities to meet current demands while planning for future needs.
The capabilities detailed in the documents on this page cover key areas such as flow control, pressure management and demand forecasting, providing a comprehensive view of the tools and processes that keep gas networks running smoothly. Complementing these capabilities are strategic methodologies for maintaining system resilience, integrating new technologies, and aligning operations with environmental and regulatory standards.
Whether you’re involved in daily operations, strategic planning or regulatory oversight, these publications and resources will provide valuable insights into how our gas network is managed and how it can be optimised to support safe, efficient and sustainable gas distribution.
Explore our capability and methodology documents
Gas Transportation Transmission Planning Code (TPC)
The Transmission Planning Code describes our approach to planning and developing the NTS in accordance with our duties as a gas transporter and other statutory obligations relating to safety and environmental matters. Statements are prepared in accordance with the obligations placed on the Company by Special Condition 9.11 of our Gas Transporters Licence in respect of the NTS. This licence condition requires us to prepare and consult on a Transmission Planning Code, and comply with the Code in the planning and development of the NTS.
2023
Gas Ten Year Statement (GTYS)
The Gas Ten Year Statement (GTYS) is published annually to provide customers and stakeholders with a better understanding of how we intend to operate and plan for the gas National Transmission System (NTS) over the next ten years.
We use the GTYS to provide information to help customers identify connection and capacity opportunities on the NTS. We summarise key projects and changes to our internal processes. We provide updates on current and future challenges which affect the way we plan and operate the NTS. We also discuss what we’re doing to address them as system operator and transmission owner.
Past GTYS documents
2022
Gas Demand Forecasting Methodology (GDFM)
Our GDFM document is produced to provide a general overview of the methods used by National Gas to calculate peak day demand forecasts and load duration curves. Day-ahead and within-day gas demand forecasting use a separate methodology, which is not covered in this report. The forecasting methodology evolves over time in response to changes in the market, new technology and changing requirements.
Gas Demand Forecasting Methodology 2020