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HomeMy WebLinkAboutStaff Report 2305-15074.Discussion and Presentation of the Update of the Grid Modernization (Discussion 7:50 PM – 8:50 PM) Staff: Tomm Marshall Item No. 4. Page 1 of 1 Utilities Advisory Commission Staff Report From: Dean Batchelor, Director Utilities Lead Department: Utilities Meeting Date: June 7, 2023 Staff Report: 2305-1507 TITLE Discussion and Presentation of the Update of the Grid Modernization ATTACHMENTS Attachment A: Presentation APPROVED By: Dean Batchelor, Director of Utilities Staff: Tomm Marshall Electric Distribution Infrastructure Modernization Update June 07, 2023 www.cityofpaloalto.org Staff: Tomm Marshall 2 Electric Infrastructure Analysis Report •Peak Demand –6 kVA per home. •Capacity increases –Distribution transformers and secondary conductors. •12 kV Circuit Ties •Substation Transformer Upgrades •Estimated Cost -$220 to $306 Million 3 Peak Load Mitigation •Technologies to reduce coincident loading are in development. •Need to do a cost analysis –upgrades vs. mitigation •As technologies are developed, upgrade plans can be adjusted to incorporate new technologies. 4 System Modernization Tasks •Convert Overhead System from 4kV to 12kV •Increase Overhead System Capacity •Convert Underground System from 4kV to 12 kV •Upgrade Underground System Capacity •Increase Substation System Capacity •Install Cost Effective Technologies to Reduce Peak Load and Improve Reliability 5 Task I -Trial Upgrade Project Converting 4 kV overhead circuits to 12 kV. Trial project currently in design/construction (Leland Manor Area) •Designed for 6 kVA per home. •Construction started in the spring of 2023. •Progress dependent upon transformer availability. 6 Task II –Upgrade Overhead Systems •Add capacity to the overhead system by upgrading transformers and secondary systems. •Upgrade to residential circuits. •Reduce barriers limiting electrification of homes. •Expected to start design and construction in late 2023. •Construction completion by end of 2027. 7 Task III–Upgrade Underground Systems •Add capacity to the underground system by upgrading transformers and secondary systems. •Difficult to upgrade due requirements for transformer locations and installation of new substructure. •Reduce barriers limiting electrification of homes. •Expected to start design and construction in late 2026. •Construction completion by end of 2030. 8 Task IV–Upgrade Substations and Circuits •Add capacity to Substations. •Install Circuit ties. •Design and construction in late 2027 •Construction completion by end of 2030. 5 Task V –Load Mitigation and Reliability •Complete Study on the Cost Effectiveness and Viability in 2023. •Design and Implement Reliability Projects. 2024-2032 •Implement Cost Effective and Viable Load Mitigation Projects. 2024- 2030 9 Project Timeline 10 Funding •Project has been budgeted in the 5-year budget. •Submitted for a matching DOE Grid Resiliency and Innovation Partnership (GRIP) Grant. •Revenue bonds.