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 below shows the distribution of GGCFs, as per the latest Settlement Run data, for each Settlement Period in the last complete month against the previous three 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 April 2024 remains similar to last year with the percentage peak remaining close to 1. However, this month’s data is 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 show that all GCFs (Monday to Friday, Saturday, and Sunday) mainly remain within the expected tolerance, with some settlement periods above and below the tolerance currently under investigation.

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

The daily average GCFs tend to remain within the higher and lower tolerances, with the largest peaks and troughs usually occurring around bank holidays and clock changes.
Zero GCFs for the GSP Group _N at Settlement Periods 31 to 48 on 17 August 2023 at the R3 run which are the main cause of the drop in the daily average GCF seen on the graph for the day, have been resolved and will be corrected in the next settlement run.
Zero GCFs for the GSP Group _P at Settlement Periods 8 to 48 on 27 May 2024 at the SF run which are the main cause of the drop in the daily average GCF seen on the graph for the day, have been resolved and will be corrected in the next settlement run.

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