BSC Operations Headline Reports
The report provides commentary on BSC market operation, identifying key events and reporting on important data that may impact BSC Parties. It is produced on a monthly basis and covers the data from the two previous months and is based on a combination of latest and best available data.
- Feature on the Accession and withdrawal of BSC parties in 2018
- Feature article Flagged balancing actions on 7 December 2018
- Feature article Seasonal changes in offtaking TLMS
- Regular article on Trading Charges in November
- Regular article on Balancing Mechanism volumes in November
- Regular article on System Prices in December
Accession and withdrawal of BSC parties in 2018
In 2018, 40 parties acceded to the BSC, with at least one new Party acceding each month. March, May and September were the most active months, with nine, five and five new Parties joining
Eight Parties exited the BSC last year, across four different months, with five leaving in November 2018.
This year, compared to last year, there have been 16 less Parties ascending to the BSC (40 this year, compared to 56 in 2017), meaning acceded Parties fell by 29%. However the number of Parties withdrawing from the BSC remained unchanged (eight in both 2017 and 2018).
The Credit Default processes are triggered when a Party’s Credit Cover Percentage (CCP) exceeds a given threshold. The Level 1 Credit Default process is triggered when the CCP exceeds 80% and the Level 2 Credit Default process is triggered when the CCP exceeds 90%. Parties always receive a consequence free period of at least 24 hours to resolve their Credit Default once the process is initially triggered.
Flagged balancing actions on 7 December 2018
60% of balancing actions were Flagged in the System Price calculation on 7 December 2018. A total of 142GWh of balancing actions were taken on this date.
15% of actions were Stage 1 Flagged and retained their initial price. 45% of balancing actions were Stage 2 Flagged and lost their
initial price. Note these are all accepted balancing actions – only a proportion of these will feed through to the final price.
73% of Sell actions (Bids and Sell Balancing Services Adjustment Actions) were Stage 1 Flagged; 61% of these were from Wind BMUs. The average initial price of a Flagged Wind Sell action was -£71.48/MWh.
Seasonal changes in offtaking TLMS
This graph is an adaptation of “Daily Average Offtaking Transmission Loss Multiplier (TLM)” from the Trading Operations Report, with a number of GSP Groups removed. Following implementation of P350 ‘Introduction of a seasonal Zonal Transmission Losses scheme’ on 1 April 2018, TLMs vary by region and season. The change in Transmission Loss Factors (TLF) on 1 December, due to the change in season from Autumn to Winter, has impacted TLMs in some regions more than others.
The London, Southern, South Eastern and South Western GSP Groups saw the average Offtaking TLM increase from November to December. The South Eastern GSP Group had the largest increase in average Offtaking TLM, rising by 0.005.
The Merseyside and North Wales, Northern, North Western, Yorkshire, South Scotland and North Scotland GSP Groups saw a decrease in the average Offtaking TLM from November to December. The North Scotland GSP Group saw the largest decrease in Offtaking TLMs from November to December. Offtaking TLMs average 0.981 in December, compared to 1.001 in November.
The Eastern, East Midlands, Midlands and South Wales average Offtaking TLMs remained similar between November and December, so have not been displayed on the graph.
Historic TLM and Seasonal TLF data is available on the ELEXON Portal.
Full list of reports
The BSC Operations Headline Report is produced on a monthly basis for the BSC Panel meetings, and is circulated to the Imbalance Settlement Group (ISG) as well as being published on the ELEXON website.
Please note that the reporting months are the two prior to the current month, based on a combination of latest and best available data.