GSP Group Correction Factors data from the Trading Operations Report

Glossary

The page below details highlighted GSP Group Correction Factors (GGCFs) 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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Distribution of Half-Hour GGCFs across all GSP Groups

The chart bellow shows the distribution of GGCFs, as per the latest Settlement Run data, for each Settlement Period in the last complete season and the latest three complete years. Again it shows the effectiveness of profiling, with the ideal being a narrow distribution centred on 1.

Highlights

The distribution of HH GSP GCFs, across all GSP Groups, for December 2023 remains similar to previous years with the percentage peak remaining close to 1; however, this month’s data remains slightly more skewed to the right when compared to the same month in previous years.  

Half-Hour Correction factors by Settlement Period volume 

The following is based on Initial Settlement (SF) Run for the latest month and is weighted across all GSP Groups.

The chart below shows, for each of the day types used in profiling, a volume weighted average, such as adjusted to reflect the relative sizes of each GSP Group (in terms of total daily energy consumption), of the GGCFs across all GSP Groups by Settlement Period.

The source data are GGCFs from the Initial Settlement (SF) Run taken over the latest month for which SF data is available. The average is taken, for each Settlement Period, over the one month interval to create plots of volume-weighted GGCFs for the periods from Monday to Friday, for Saturdays and for Sundays included in the data set. It allows comparison of profiling for different day types and shows intra-day profiling effects.

Anything between 0.9 and 1.1 is considered reasonable. Values outside this range may indicate issues with load profiling or metering data.

Highlights

The weighted GGCFs breakdowns have shifted from last month, with all GCFs across all day types Monday to Friday and Sunday) being slightly above tolerance.

Daily Average GSP Group Correction Factor by GSP Group

The chart below is based on the latest Settlement Run for the last two years.

This chart shows the daily average GGCF using the latest Settlement Run data for each GSP Group for the last two years. It shows both profiling and metering effects, as per the earlier explanation on the effects of profiling and metered volumes.

Highlights

For the first half of 2023, the daily average GCFs tended to remain between the higher and lower tolerances – with the largest peaks and troughs usually occurring around bank holidays.

Since June 2023, GCFs have been more volatile, with both the lower and upper thresholds breached on certain days. The low GCFs seen in GSP Group_P in September/October are likely caused by the known issue where metered data from a wind farm in this region is not received until later reconciliation runs, whilst the low GCFs seen more recently in GSP_K will be tracked but are expected to be corrected in the next settlement run.

The spike seen on 28 August 2023 is due to this day being a bank holiday, and the spike seen on 9-10 September 2023 across several GSPs Groups was due to a profiling error on these days. This has now been corrected, so should disappear when future settlement runs for these days are received.

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