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Daily Balancing Volume 2020-2021

Table Information

SETT_DATE

Title Settlement Date
Type date
Description The Payment Date in relation to an Initial Settlement Run.
Comment
Example 22/03/2020
Unit

SETT_PERIOD

Title Settlement Period
Type integer
Description A period of 30 minutes beginning on the hour or the half-hour 
Comment On the first day of BST when clock change happens there will be 46 half hours (SP's) in the day. Similarly the first day of GMT will have 50 half hours as the clock goes back 1 hour at 2am.
Example 15
Unit

Energy Imbalance (MWh)

Title Energy Imbalance (MWh)
Type number
Description Energy imbalance is the difference between the amount of energy generated in real time, the amount of energy consumed during that same time, and the amount of energy sold ahead of the generation time for that specific time period. The monthly energy imbalance cost can be negative or positive depending whether the market was predominantly long or short.
Comment
Example -169.623
Unit MWh

Frequency Control Offers (MWh)

Title Frequency Control Offers (MWh)
Type number
Description Frequency response offers are predominantly required overnight when generation is running closer to its SEL, and offers are required to lift a unit’s position to enable them to provide high frequency response (reducing output
Comment
Example 6.519
Unit MWh

Frequency Control Bids (MWh)

Title Frequency Control Bids (MWh)
Type number
Description The required Frequency Response Bid volume is dependent on the relative market synchronised position of the generation based on its upper and lower output limits.
Comment
Example -132.738
Unit MWh

Positive Reserve (MWh)

Title Positive Reserve
Type number
Description The Operating Reserve volume uses the half hourly reserve requirement and market length less market synchronised headroom to define the volume of reserve required per half hour. When there is enough market synchronised headroom or the market is sufficiently long, there will be no reserve requirement and therefore there should be no procured reserve volume.
Comment
Example 1150.5
Unit MWh

Constraint Offers (MWh)

Title Constraint Offers (MWh)
Type number
Description Submitted offers on a unit to increase its output.
Comment
Example 97.5
Unit MWh

Constraint Bids (MWh)

Title Constraint Bids
Type number
Description Submitted bids on a unit to reduce its output.
Comment
Example -606
Unit MWh

Negative Reserve (MWh)

Title Negative Reserve (MWh)
Type number
Description A Negative Reserve service can provide the flexibility to reduce generation or increase demand to ensure supply and demand are balanced. The service is held in reserve to cover unforeseen fluctuations in demand, or generation from demand side PV and wind.
Comment
Example -3.15
Unit MWh

Other (MWh)

Title Other (MWh)
Type number
Description BM actions, which are not easily accounted for in the previously reported categories. Other general costs; trading option fees, bank charges, sterling adjustments. Non-Delivery and Reconciliation 
Comment
Example 226.364
Unit MWh