BM Unit Offer Profile

About

The BM Unit Offer Profit chart is much like the BM Unit Bid Profile chart, but instead focuses on the opportunities to increase generation in the market. An example of this can be seen for Cottam 1 in the week ending 16th October 2016:

Here the unit was planning to generate when the red area appears and otherwise had two volumes for upward dispatch, but both always at the same price.

On the 12th the unit saw that the system was tight and moved its price up at around midday before having an action accepted for a full run at £800/MWh. This action earned the plant revenues of £645k, with only a small portion of that being the fuel cost and the strategy of the unit over these days can be seen from the chart.

Included Data

The data on this chart is as follows:

• Capacity - The nameplate capacity of the unit - ie if at 100% availability.
• Decl Offer Level 1 - The price in £/MWh offered to National Grid for the first block of additional MWhs of generation above the Pre-Balancing Dispatch (FPN).
• Decl Offer Level 2 - The price in £/MWh offered to National Grid for the second block (if it exists) of additional MWhs of generation above the Pre-Balancing Dispatch (FPN).
• Decl Offer Level 3 - The price in £/MWh offered to National Grid for the third block (if it exists) of additional MWhs of generation above the Pre-Balancing Dispatch (FPN).
• Decl Offer Level 4 - The price in £/MWh offered to National Grid for the fourth block (if it exists) of additional MWhs of generation above the Pre-Balancing Dispatch (FPN).
• Decl Offer Level 5 - The price in £/MWh offered to National Grid for the fifth block (if it exists) of additional MWhs of generation above the Pre-Balancing Dispatch (FPN).
• Unavailable - The unaccounted for balancing volumes if the available turn down has not had prices declared.
• Pre-Balancing Dispatch (FPN) - The levels of planned generation ahead of gate closure and typically matching the volumes sold in traded markets.
• Expected Metered Dispatch - The levels of post-balancing generation after National Grid has adjusted generation within gate closure.
• Decl Offer Price 1 - The price in £/MWh offered to National Grid for the first block of additional MWhs of generation above the Pre-Balancing Dispatch (FPN).
• Decl Offer Price 2 - The price in £/MWh offered to National Grid for the second block of additional MWhs of generation above the Pre-Balancing Dispatch (FPN).
• Decl Offer Price 3 - The price in £/MWh offered to National Grid for the third block of additional MWhs of generation above the Pre-Balancing Dispatch (FPN).
• Decl Offer Price 4 - The price in £/MWh offered to National Grid for the fourth block of additional MWhs of generation above the Pre-Balancing Dispatch (FPN).
• Decl Offer Price 5 - The price in £/MWh offered to National Grid for the fifth block of additional MWhs of generation above the Pre-Balancing Dispatch (FPN).
• Accepted Offer Price - The average price of any turn ups requested by National Grid during the period, with this being a weighted average of the blocks this applies to.

Note that National Grid will accept actions in order so accept MWhs from pair 1, then pair 2, etc.

Data Service

The BM Unit Offer Profile data can be extracted from the API to get the declared offer pair data for a single unit in the market. The parameters used as follows: