An Inside Look at Electric Reliability 2018 Electric Reliability Report Stockton, California December 13, 2019
Delivering Safe and Reliable Electric Service Steven Calvert P.E. Senior Manager, Electric System Reliability
Agenda • Safety and Welcome • Overview of our electric system • Power outages and interruptions • System-wide and local reliability statistics • What we’re doing in your community to improve reliability • Questions
About us . Energizing California for over 150 years Together, Building a Better California
Our electric system We are committed to delivering safe, reliable, affordable and clean energy. 107,000 miles 18,400 miles
Our electric system
Why are there outages and interruptions? Weather Vegetation (trees contacting power lines) Animals Equipment failure Vehicle accidents Digging into underground electric lines
Outage Classifications The company classifies outages according to industry definitions specified in the Institute of Electrical and Electronic Engineers (IEEE) standards. Sustained Outage Momentary Outage An outage greater than 5 An outage of 5 minutes or less in duration. minutes in duration. Planned Outage Major Event Outages which are customer A set of outages which occurred during a specific time and location and which or public official-requested or combined, exceeds historically expected where the company has provided notice to the customer. outage duration (SAIDI) for at least one day (as defined in IEEE 1366-2012)
Reliability What we use to How we track What we do with measure reliability: outages: the data: SmartMeter data Outages are logged Data is grouped into in PG&E’s outage various metrics — Information from databases SAIDI, SAIFI, CAIDI, MAIFI — so we can customer calls Some data is stored learn more about our Information from PG&E’s automatically reliability and how best automated systems to improve Detailed data is gathered by PG&E’s first responders and field crews
How We Manage Reliability Immediate Response Restoration crews make repairs and improvements to the electric system due to an outage Daily Reviews Previous day outages are reviewed and near-term system improvement projects are identified Weekly and Monthly Reviews Trends in electric reliability are reviewed and action items are developed for both near- and long-term system improvement projects Annual Reviews Long-term (one year or greater) system improvement projects are identified and planned
Reliability is consistently delivering power to our customers How we define and measure this Average cumulative minutes of sustained power Average number of sustained power interruptions interruptions during the year during the year Average duration of each sustained power Average number of momentary power interruptions interruptions during the year during the year *AIDI – Average cumulative minutes of sustained *AIFI – Average number of sustained power power interruptions during the year on a specific interruptions during the year on a specific circuit. 11 circuit.
12 PG&E’s Electric System Performance What is PG&E’s system -wide reliability story? How will PG&E’s reliability improve? • Continued reliability improvement though recently • Significant infrastructure and system impacted by severe storms and wildfires hardening investments • 20% reduction in the amount of time customers • New technology implementation experience outages since 2009 - SAIDI • Programs targeting poorly-performing areas • 8% reduction in customer outages since 2009 - SAIFI SAIDI: Planned & Unplanned Outages (Excludes Major Event Days) SAIFI: Planned & Unplanned Outages (Excludes Major Event Days) 180.0 1.400 160.0 1.200 158.0 157.2 140.0 1.207 1.173 1.000 1.130 141.7 1.097 1.079 1.070 120.0 131.0 1.021 126.3 0.966 0.958 0.800 100.0 116.1 113.4 0.871 108.9 108.4 80.0 95.9 0.600 60.0 0.400 40.0 0.200 20.0 0.0 0.000 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 CAIDI: Planned & Unplanned Outages (Excludes Major Event Days) 160.0 140.0 134.7 120.0 130.3 129.3 118.3 117.0 115.9 100.0 112.2 110.1 108.5 106.7 80.0 60.0 40.0 20.0 0.0 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
Combined Transmission and Distribution System Indices (2009-2018) (Excludes MED and Independent System Operator ISO outages, and includes planned outages) T&D System - SAIDI (Incl. Planned Outages and Excl. MEDs and ISO Outages) 165.0 158.0 155.0 157.2 141.7 145.0 135.0 131.0 125.0 126.3 116.1 113.4 115.0 105.0 108.9 108.4 95.9 95.0 85.0 75.0 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 (Includes Planned Outages, Excludes Major Event Days and ISO Outages) 13
Stockton Division Reliability Statistics Chart 104: Division Reliability - AIDI Indices Chart 123: Division Reliability - AIFI Indices Chart 142: Division Reliability - MAIFI Indices Chart 161: Division Reliability - CAIDI Indices 14
15 Poorly Performing Electric Circuits — AIDI PG&E’s poorly performing electric circuits in 2018, by the amount of time the average PG&E customer experienced a sustained outage (an outage that lasts more than five minutes). Table 62: AIDI Worst Performing Circuit for 2018 • Highlighted circuits are poor performing on both SAIDI and SAIFI metrics. Arrow highlights Stockton area circuits.
16 Poorly Performing Electric Circuits — AIFI PG&E’s poorly performing electric circuits in 2017, by the number of times the average PG&E customer experienced a sustained outage (an outage that lasts more than five minutes). Note that no Sacramento circuits met this criteria. Table 61: AIFI Worst Performing Circuit for 2018 • Highlighted circuits are poor performing on both SAIDI and SAIFI metrics. Arrows highlights Stockton area circuits.
PG&E’s Electric Circuit Geography System Map Stockton Division Area Map
The Future of PG&E Reliability PG&E plans to continue to explore and deploy smart grid technology, including: • Fault Location, Isolation, and Service Restoration (FLISR) technology that automatically reroutes power flows to speeds restoration of service to customers. • Smart Line Sensors to improve our ability to monitor for outages • New ways of using SmartMeter information • Continue integrating clean and renewable energy on the grid, such as: • Solar • Electric vehicles • Battery storage technology • Energy efficiency improvement
Reliability in Stockton Division (Planned & Unplanned Outages) Improved reliability over the Fewer outage interruptions. last 10 years. • In 2009, the average customer • In 2009, the average customer experienced 1.383 sustained experienced 194.5 minutes of power interruptions in a year sustained power interruptions • In 2018, the average customer • In 2018, customers experienced 1.115 experienced 121.8 minutes interruptions • An improvement of over 37% • An improvement of over 19%
Stockton Division: Recently Completed Electric Projects TripSavers (various locations) : Stagg 1105: Completed 2016, 2017 & 2018 Completed 2018 44 TripSavers (TS) were installed in Identified as a poor performing circuit in Stockton Division. This new technology 2014, significant work including the protection device replaced traditional fuses installation of new protection devices and and had the functionality to “test” back in resolving reliability issues identified after an intermittent fault. This would through detailed circuit inspections. A reduce the number of sustained outages 25+% improvement in reliability circuit for customers beyond new TS. performance was recorded in 2018. Number of customers: about 10,000 Number of customers on the circuit: per year 1,794
Stockton Division: Future Electric Projects Pine Grove 1102: PSPS Devices (various locations): Planned for 2020-21 Planned for 2019-20 This project will replace bare wire with This program will install various switching insulated conductor, increase strength and protection devices equipped with requirements for poles, install system Supervisory Control and Data Acquisition automation/protection equipment, and (SCADA) technology. This would convert overhead (OH) equipment to minimize the customer disruption underground (UG) in targeted locations. impacts of a Public Power Shut Off This would minimize the risk of an asset (PSPS) event. failure that could result in a fire ignition. Number of customers: about 30,000 per year Number of customers on the circuit: 2,801
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