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Proposed Changes to Capacity Reporting and Calculation in Implicit Auctions for Interconnectors

This report details proposed changes to the offered capacity in implicit auctions, focusing on identifying interconnector trading opportunities within EA2 and WD1. It aligns with the Congestion Management Guidelines under Regulation (EC) No. 714/2009 and is consistent with SEM-12-054. Key updates include new reporting requirements for each interconnector and trading period, adjustments in the calculation of interconnector residual capacity units, and the introduction of new reports on the Auction Management Platform. The aim is to enhance transparency and efficiency in capacity allocation and trading.

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Proposed Changes to Capacity Reporting and Calculation in Implicit Auctions for Interconnectors

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  1. MOD_17_12 Report on Offered Capacity in Implicit Auctions

  2. Proposed Change • New report on the Offered Capacity in Implicit Auctions identifying Interconnector trading opportunities in EA2 and WD1 • Required by Congestion Management Guidelines [Regulation (EC) no. 714/2009] • Consistent with SEM-12-054 [Intra Day Congestion Charging Methodology] • To be produced after EA2 and WD1, for each Interconnector, for each Trading Period

  3. Report Content • Indication of the minimum IUN allocation available in any Trading Period Import Offered Capacity Import ATC Total MIUNs Total MIUNs 0 TP1 TP2 Export Offered Capacity Export ATC

  4. T&SC Drafting Change • Changes made to IDT version of the code [MOD_18_10 V2] • Added reports to Appendix E and Agreed Procedure 6 • New Terms in Glossary • AIC: Allocated Interconnector Capacity • OICE: Implicit Auction Offered Interconnector Capacity for Export • OICI: Implicit Auction Offered Interconnector Capacity for Import

  5. MOD_18_12 Constraint Payments Calculation for Interconnector Residual Capacity Units

  6. Proposed Change 1 • Mod_12_11: Interconnector Unit Loss Adjustment when Exporting • Original: XXXLFuh = XXXuh x CLAFuh • Import: XXXLFuh = XXXuh x CLAFuh • Export: XXXLFuh = XXXuh / CLAFuh • This Mod is to treat Interconnector Residual Capacity Units in the same way: • Interim: CONPuh = (SIIPlh + SIEPlh) * CLAFuh • Proposed: CONPuh = (SIIPlh x CLAFuh) + (SIEPlh / CLAFuh)

  7. Proposed Change 2 • Simplification of the Calculation • Current: CONPuh = (SIEPlh x SIEQlh + SIIPlh x SIIQlh) x TPD x CLAFuh • Interim: CONPuh = (SIIPlh + SIEPlh) * CLAFuh • Proposed: CONPuh = (SIIPlh x CLAFuh) + (SIEPlh / CLAFuh) • Current: notional hourly price by quantity in a given direction • Proposed: half hourly net payment information • Multiply the import payment by CLAF and divide the export payment by CLAF • Allows for more complex SO Trade scenarios

  8. SO Trade – details for reference • An SO Trade can only occur after market gates are completed for the relevant Trading Periods • Paper due to be published shortly explicitly detailing the scenarios where they will be considered • New reports being introduced on the Auction Management Platform • SO Trade Prices • Individual SO Trade details

  9. T&SC Drafting Change • Changes to definitions in 5.70, Glossary, Appendix K, e.g. • SO Interconnector Import Price Payment (SIIPlh) which is the volume-weighted average pricepayment for each Trading Period for SO Interconnector Trades which are forwhen they are a net MW import to the Pool (or zero if there are no such trades); • SO Interconnector Import Quantity (SIIQIh) which is the time-weighted average net quantity for each Trading Period (expressed as a positive number in MW) of SO Interconnector Trades which are forwhen they are a net MW import to the Pool (or zero if there are no such trades) • Calculation in 5.90 changed as previous (proposed) and the interim calculation in 7.70 • Implementation with Mod_12_11

  10. Systems • Source system for the SO Trade information is the Auction Management Platform • No change to SEM interfaces – uses existing SO Interconnector Trade Data Transaction • Calculation performed by SEMO Operations for invoicing using spreadsheet (minor adjustment)

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