Imbalance Volumes data from the Trading Operations Report


The page below details highlighted Imbalance Volumes data from the previous month. This data is acquired from BSC Agents and inputted to the Trading Operation Monitoring Analysis System (TOMAS) database.

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Daily Party Imbalance Volumes

This chart shows the daily totals of energy bought from the system (at System Buy Price) by Parties who were “Short”, and the energy sold to the system (at System Sell Price) by Parties who were “Long”. It also shows the average Noon- Effective Temperature to highlight any potential correlation with market conditions and imbalance volumes throughout the period.


On 27 November 2021 there was 113GWh of Imbalance Volume; 45GWh of Long and 68GWh of Short Imbalance Volume. This is the highest total Imbalance Volume since 8 May 2021, which had 116GWh of Imbalance Volume; 41GWh Long and 74GWh Short Imbalance Volume.

Gross Monthly Party Imbalance Volume and Percentage of Total Demand

This chart plots the monthly gross Party Imbalance Volumes. A second plot shows Party Energy Imbalance Volumes as a percentage of total demand. The chart uses latest run type data.


Imbalance volumes rose by 97GWh (4%) to 2,726GWh from October to November 2021.


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