Sep 2018
Electricity Transmission
WATTS – Weather Analytics for The Transmission System
Sep 2018
May 2019
National Grid Electricity Transmission
Robin Gupta
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Network Innovation Allowance
ET - New technologies and commercial evolution
Increasing amounts of renewable energy are creating new challenges for transmission system balancing. As both supply and demand in Great Britain become increasingly weather-sensitive, levels of congestion across transmission zone boundaries may experience increased variability. This could give rise to significant changes in the level of congestion from year to year, and changes in the likelihood of boundaries coming under stress due to extreme weather events.

The weather adds complexity by introducing spatial and temporal relationships between weather-sensitive demand and generation across the transmission system. Limited transmission capacity between zones leads to varying levels of weather-induced congestion in different parts of the country. When excess supply in one transmission zone cannot be safely transported elsewhere, it incurs a cost.
Understanding the impact of a wide range of possible weather scenarios on transmission congestion is important in order to manage the network cost effectively and provide the best service to consumers as reinforcements can be planned in advance and proactively.
  • Analyse the profiles of weather-sensitive demand and supply in different parts of the system
  • Combine simulated weather data with the flow model to estimate the impact of weather on transmission congestion in different parts of GB
  • Analyse the statistical co-dependence of weather-sensitive demand and supply in different parts of the GB transmission system
  • Investigate the impact of planned renewable generator installations on transmission congestion
  • Investigate the degree to which past constraint payment events can be attributed to the weather