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Update Since November 2010 Mods Meeting

Mod 41_10 Validation of Firm Access Quantity of Trading Site (FAQSst) by the System Operator Tuesday, 1 st February 2011. Update Since November 2010 Mods Meeting.

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Update Since November 2010 Mods Meeting

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  1. Mod 41_10Validation of Firm Access Quantity of Trading Site (FAQSst) by the System OperatorTuesday, 1st February 2011

  2. Update Since November 2010 Mods Meeting • Recent NIE Distribution Connection Agreements do not contain a reference to firm or non-firm access.  Where this is the case the validation process will be straightforward for SONI to undertake i.e. FAQs = MEC for all such NI units. • At present there is no agreed process in place in N Ireland for allocation of transmission access (firm or non-firm) to distribution connected generators.  So all existing connected distribution generators that have a Connection Agreement with NIE and a TUoS Agreement with SONI are assumed to be firm.

  3. Update Since November 2010 Mods Meeting • Validation of FAQs should be carried out when a unit is registered and also when the participant advises of a change to FAQs. (See V2 of Mod 41_10) • TSOs and SEMO have agreed to review FAQs for all registered units in SEM as part of this validation process.

  4. Background Slides

  5. Background • The Firm Access Quantity of Trading Site (FAQSst) parameter will determine the level to which a generator unit can be scheduled in SEM. As such, this parameter has a material impact on the outcome of pricing and scheduling in SEM and an incorrect value may lead to incorrect MSQs and SMPs in SEM. • As the System Operator is responsible for issuing Connection Agreements to the Transmission System, it is appropriate for the System Operator to validate the Firm Access Quantity of Trading Site proposed for each Trading Site to ensure it reflects the Connection Agreement. Firm access quantity is also advised for RoI units and EirGrid’s role • At the moment the Actual Availability calculation for VPTGs in the systems is not limited by FAQ. With the change proposed in Mod_43_10 this will change

  6. Context to Modification • When a participant submits a unit registration application… • Participant application form contains the parameters: • registered_firm_cap • non_firm_acc_quantity • SEMO and relevant SO reviews the data provided and in particular the SO confirms the firm access quantity • When SEMO set up the Trading Site in SEM systems: • Trading Site set-up and the associated FAQ is not validated by the relevant System Operator • The split of firm access across a number of trading sites requires confirmation by the relevant SO but this process is ad-hoc and not auditable i.e. no records are kept. • The SO cannot view the FAQ on a Trading Site. • Errors may come to light after Ex-Post Pricing schedule

  7. Benefits of this Modification • By having a formal validation process by the relevant SO for FAQ: • Ensures that units are registered with the correct Firm Access Quantity • Ensures that complicated unit registrations are set-up without error i.e. where multiple trading sites exist under one connection agreement • The validation can be carried out through a business process with no system cost. It is proposed that the business process involve the validation of FAQ by written confirmation.

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