Item 10- Staff Briefing Distribution Reliability and Resiliency — original pdf

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Distribution Reliability & Resiliency David Tomczyszyn Vice President, Electric System Engineering & Technical Services February 2025 © Austin Energy Reliability and Resilience Reliability • Performing consistently well • Performs intended function without failure over time and in specified conditions Resilience • Capacity to withstand or recover quickly from difficulties • Toughness • The ability to spring back into shape Distribution Reliability Performance of the distribution system as originally designed, built and operated for safety, power quality and infrastructure protection Distribution Resilience Reliability factors, plus incorporating self-healing and hardening techniques to withstand and recover more quickly from unplanned events 2 Austin Energy Distribution System Resilience Plan Reliability Resilience Improve service reliability and minimize impacts from outage events through maintenance, upgrades and technology enhancements across the distribution system that delivers electricity to homes and businesses. 3 Austin Energy’s Distribution System Overview 4 Distribution Reliability – FY2025 Q1 Average duration of outages in minutes Average time to restore service to affected customer Average number of outages per customer 1.76 213.60 88.8 112.65 0.85 Austin Energy Q1 FY2025 Texas Avg. CY2023-Final Data* Austin Energy trendline 1.00 0.80 0.60 0.40 0.20 0.00 75.37 Austin Energy Q1 FY2025 100 80 60 40 20 0 Texas Avg. CY2023-Final Data* Austin Energy Q1 FY2025 Texas Avg. CY2023-Final Data* 120 100 80 60 40 20 0 FY22 Q2 FY22 Q3 FY22 Q4 FY23 Q1 FY23 Q2 FY23 Q3 FY23 Q4 FY24 Q1 FY24 Q2 FY24 Q3 FY24 Q4 FY25 Q1 FY22 Q2 FY22 Q3 FY22 Q4 FY23 Q1 FY23 Q2 FY23 Q3 FY23 Q4 FY24 Q1 FY24 Q2 FY24 Q3 FY24 Q4 FY25 Q1 FY22 Q2 FY22 Q3 FY22 Q4 FY23 Q1 FY23 Q2 FY23 Q3 FY23 Q4 FY24 Q1 FY24 Q2 FY24 Q3 FY24 Q4 FY25 Q1 SAIFI – System Average Interruption Frequency Index SAIDI – System Average Interruption Duration Index CAIDI – Customer Average Interruption Duration Index Major event days are excluded from reliability metrics *Texas Avg. CY2023-Final Data-EIA Final Data for each metric 5 Distribution Reliability Infrastructure maintenance Design and construction to utility standards Vegetation management Maintaining optimal system configuration Engineering coordination studies Manual operations to proactively prevent power disruptions 6 Circuit Hardening Program An end-to-end Distribution Mitigation Program for long-term health and performance improvement Circuit Packet Review – Existing Projects, Issues & Tickets Circuit Patrol Circuit Coordination Studies & Infrastructure Enhancements Vegetation Management Asset Repair/ Pole Remediation & Replace Install Smart Grid Devices, Enhanced Protection Devices, Grid Hardening Devices Grid System Asset Data True-Up 7 Pole Inspection “Total” Pole Inspection, Remediation and Wildfire Mitigation Osmose Utilities • Groundline Inspection • Pole Health o Sound & Bore o Resistograph o Excavation o Pole Restoration (Steel Trusses) o Wildfire Mitigation (“Armorbuilt”) 8 Comprehensive Drone Inspections 9 Example Resiliency Technologies VacuFuse TripSaver EdgeRestore IntelliRupter Covered Conductor 10 Recloser: Circuit Resiliency Objective Install more sectionalizing devices (Recloser) to increase Austin Energy ability to isolate a fault or perform maintenance. Outcomes • Fewer customers impacted by planned or unplanned outages. • Create more paths to provide power. Before Recloser Circuit A Substation Breaker A Breaker B Circuit B After Recloser Circuit A Substation Switch open S1 Circuit B Breaker A Breaker B Fault due to tree limbs, equipment failure, storm S2 Switch open Faulted section isolated R R Recloser 1A - Open R R Recloser 1B - Closed Recloser 2A - Open S2 Switch open S3 Switch closed Recloser 2B - Closed 11 Underground Feasibility & Overhead Hardening Studies • Approximately 7,000 miles of distribution lines currently underground and 5,000 miles overhead • Twin studies on undergrounding/hardening resiliency opportunities • Partially covered by FEMA Building Resilient Infrastructure and Communities (BRIC) Grant • Study results, once finalized, will inform a multi-year Austin Energy Distribution Resiliency Plan • Coordination across City projects as applicable 12 Comprehensive Multi-Year Distribution Resiliency Plan Circuit Hardening Program Strategic infrastructure enhancements (Study Results) Pole inspection & remediation Distribution Resiliency Plan (Forthcoming) Wildfire Mitigation Design & materials methodologies New technologies & infrastructure 13 Next Steps Undergrounding Feasibility Study Results Overhead Hardening Study Results Develop multi- year Distribution Resiliency Plan Present Distribution Resiliency Plan Electric Utility Commission March 2025 Electric Utility Commission May 2025 Use studies to inform near- and long-term priorities Electric Utility Commission Second half of 2025 14 QUESTIONS? ©Austin Energy. All rights reserved. Austin Energy and the Austin Energy logo and combinations thereof are trademarks of Austin Energy, the electric department of the City of Austin, Texas. Other names are for informational purposes only and may be trademarks of their respective owners.