Through this initiative, developed from the existing variable operations and maintenance cost review recurring stakeholder process, the ISO will update the operations and maintenance cost framework by providing definitions for operations and maintenance cost components, updating variable operations adder values, and calculating default maintenance adders.
Outcome: Effective as of trade date Jan. 1, 2022, the ISO updated the operations and maintenance cost framework by providing definitions for operations and maintenance cost components, updating variable operations adder values, and calculating default maintenance adders. This implementation defined the Operations and Maintenance (O&M) cost components, including how to differentiate between fixed and variable O&M costs, redefined the O&M adder components, and allowed market participants to bid in all of their variable maintenance costs through a new default maintenance adder in lieu of the current Major Maintenance Adder (MMA).
| Proposal Development | Decision | Implementation | Completed/Closed |
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Jan 25, 2021 Revised draft tariff language posted
Oct 22, 2020 Final proposal posted |
May 12, 2021 FERC approval (ER21-1266)
Mar 03, 2021 Tariff amendment (ER21-1266) Nov 18, 2020 Board of Governors approval |
Oct 01, 2021 Deployment
Oct 2021 Activation |
Completed |
Training |
https://youtu.be/wIbSchmhVio
Video - Variable Operations and Maintenance Cost Review Training - Oct. 14, 2021 10/19/2021
Presentation - Variable Operations and Maintenance Cost Review Training - Oct. 14, 2021 10/14/2021
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http://www.caiso.com/Documents/May12-2021-Order-VariableOperations-Maintenance-ER21-1266.pdf
May 12, 2021 Order - Variable Operations and Maintenance (ER21-1266) 05/19/2021
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http://www.caiso.com/Documents/Mar3-2021-TariffAmendment-VariableOperationsandMaintenance-ER21-1266.pdf
Mar 3, 2021 Tariff Amendment - Variable Operations and Maintenance (ER21-1266) 03/05/2021
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Web meeting |
https://youtu.be/XY2rr9eFHh8
Video - Variable Operations and Maintenance Cost Review - Feb 2, 2021 02/05/2021
Revised Draft Tariff Language - Variable Operations and Maintenance Cost Review 01/25/2021
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Web meeting |
https://stakeholdercenter.caiso.com/InitiativeDocuments/StakeholderCommentsResponseMatrix-VariableOperations-MaintenanceCostReview-DraftTariffLanguage.pdf
https://youtu.be/PKp_iLyjJgw
Video - Variable Operations and Maintenance Cost Review - Nov 20, 2020 11/25/2020
Transition Period Draft Tariff Language - Variable Operations and Maintenance Cost Review 11/03/2020
Draft Tariff Language - Variable Operations and Maintenance Cost Review 11/03/2020
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View comments |
Web meeting |
https://youtu.be/urpncyOOmJQ
Video - Variable Operations and Maintenance Cost Review - Oct 29, 2020 11/04/2020
Presentation - Variable Operations and Maintenance Cost Review - Oct 29, 2020 10/27/2020
Final Proposal - Variable Operations and Maintenance Cost Review 10/22/2020
Supporting Calculations - Final Proposal - Variable Operations and Maintenance Cost Review 10/22/2020
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View comments |
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https://stakeholdercenter.caiso.com/InitiativeDocuments/Notice of Decisional Classification Variable Operations and Maintenance Cost Review.pdf
Notice of Decisional Classification - Variable Operations and Maintenance Cost Review.pdf 10/16/2020
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Web meeting |
https://stakeholdercenter.caiso.com/InitiativeDocuments/Presentation-VariableOperations-MaintenanceCostReview-Aug192020.pdf
Presentation - Variable Operations and Maintenance Cost Review - Aug 19, 2020 08/17/2020
Draft Final Proposal - Variable Operations and Maintenance Cost Review 08/12/2020
Supporting Calculations - Draft Final Proposal - Variable Operations and Maintenance Cost Review 08/12/2020
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View comments |
Web meeting |
https://stakeholdercenter.caiso.com/InitiativeDocuments/Presentation-VariableOperations-MaintenanceCostReview-May112020.pdf
Presentation - Variable Operation and Maintenance Cost Review - May 11, 2020 05/11/2020
Revised Straw Proposal - Variable Operations and Maintenance Cost Review 05/05/2020
Supporting Calculations - Revised Straw Proposal - Variable Operations and Maintenance Cost Review 05/05/2020
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Web meeting |
https://stakeholdercenter.caiso.com/InitiativeDocuments/Presentation-VariableOperations-MaintenanceCostReview-StrawProposal.pdf
Presentation - Variable Operations and Maintenance Cost Review - Straw Proposal 01/06/2020
Straw Proposal - Variable Operations and Maintenance Cost Review 12/19/2019
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Working groups |
http://www.caiso.com/Pages/documentsbygroup.aspx?GroupID=6A1A5E43-19A2-4F92-A38B-0EC631228F0C
Working Groups - Variable Operations and Maintenance Cost Review - Jul 2019 12/12/2019
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Cost reports |
http://www.caiso.com/Documents/VariableOperationsandMaintenanceCostDefinitionsReport-Jul022019.pdf
Variable Operations and Maintenance Cost Definitions Report - Jul 02, 2019 12/12/2019
Variable Operations and Maintenance Cost Report - Dec 26, 2018 12/12/2019
Comments on variable operations and maintenance cost report - Dec 26, 2018 12/12/2019
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