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• A break down of the gross margin by service for both the Algo ‘what if’ and the Actual (Manual) bid

  • A description of gross margin is below

• The difference between Algo ‘what if’ and the Actual (Manual) bid gross margin.

  • Note that the difference is defined as “Algo ‘what if’ minus Manual Actual”

• Specific effects on gross margin that can be attributed to particular market conditions. These are:

  • The service allocation stack (SAS) for lowerFCAS and RaiseFCAS.

    • Gross margin difference is attributed to lowerFCAS SAS when Algo expected energy target is greater than manual expected energy target. Under certain market conditions the algorithms increase energy generation in order to increase lowerFCAS enablement resulting in overall greater gross margin.

    • Gross margin difference is attributed to raiseFCAS SAS when Algo expected energy target is less than manual expected energy target. Under certain market conditions the algorithms decrease energy generation in order to increase raiseFCAS enablement resulting in overall greater gross margin.

  • Avoiding negative regulation gross margin for either lowerReg or raiseReg due to the change in generated energy caused by unit response to regulation AGC component.

    • Gross margin difference is attributed to Algos avoiding negative gross margin if the optimised regulation volume is zero, and to avoid double counting for SAS (above), the Algo and manual energy bid must be the same.

Daily Summary

This report contains the same components of gross margin as Actual (Manual) vs Algo ‘what if’ described above. However this report aggregates (sums) the 5 minute values for the selected day. Note that it does not include the specific effects on gross margin.

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Definitions

Gross Margin

As a good first order approximation, total gross margin includes the revenue gained from providing a service plus the impact on the energy produced and the fuel used in providing an FCAS service plus any other impacts.

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