GHG Cost Inputs and Fallback Tariff Clarification Jennie Sage, MQRI - PowerPoint PPT Presentation

Jul 19, 2023 •491 likes •571 views

GHG Cost Inputs and Fallback Tariff Clarification Jennie Sage, MQRI Sidney Mannheim, Legal November 8, 2018 ISO PUBLIC ISO PUBLIC GHG Tariff Clarification (39.7.1.1.1.4) The CAISO needs to update tariff section 39.7.1.1.2 Only two

GHG Cost Inputs and Fallback Tariff Clarification Jennie Sage, MQRI Sidney Mannheim, Legal November 8, 2018 ISO PUBLIC ISO PUBLIC
GHG Tariff Clarification (39.7.1.1.1.4) • The CAISO needs to update tariff section 39.7.1.1.2 – Only two of the three vendors currently identified in tariff publish a daily Greenhouse Gas price – Sometimes a vendor can delay its daily publication beyond the time-frame the CAISO requires for use in the market systems – The CAISO proposes tariff clarification to • eliminate vendor that does not publish a GHG price • average the two most recent GHG prices that are available ISO PUBLIC Page 2
GHG Tariff Clarification (39.7.1.1.1.4) ISO PUBLIC Page 3
GHG Price Fallback Scenarios: Both vendors available • Both vendors publish prices by 21:00 on Nov 6: Volume- Delivery Vendor Vintage Trades Weighted Date Average A 2018 Dec 18 40 $15.45 B 2018 Dec 18 10 $15.47 • CAISO GHG Index = Average ($15.45, $15.47) = $15.46 • CAISO GHG Index used for TD Nov 7 RTM and TD Nov 8 IFM ISO PUBLIC Page 4
GHG Price Fallback Scenarios: One vendor available • Only one vendor publishes prices by 21:00 on Nov 6: Volume- Delivery Vendor Vintage Trades Weighted Date Average A 2018 Dec 18 40 $15.45 B 2018 Dec 18 • Last reported trade and VWA price from Vendor B was $15.43 on Nov 5. • CAISO GHG Index = Average ($15.45, $15.43) = $15.44 • CAISO GHG Index used for TD Nov 7 RTM and TD Nov 8 IFM ISO PUBLIC Page 5
GHG Price Fallback Scenarios: Both vendors unavailable • No vendor publishes prices by 21:00 on Nov 6: Volume- Delivery Vendor Vintage Trades Weighted Date Average A 2018 Dec 18 B 2018 Dec 18 • CAISO GHG Index will fallback to the last TD that had two vendor prices  Nov 5 GHG Index • CAISO Nov 5 GHG Index used for TD Nov 7 RTM and TD Nov 8 IFM ISO PUBLIC Page 6
Next Steps • GHG Fallback changes in production for February 1, 2019. • The CAISO will file the Tariff clarification by the end of November. • Market Instruments BPM Attachment K updates, PRR by the end of November. ISO PUBLIC Page 7

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