Circuit Reliability Review

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Briana Stanley
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1 Circuit Reliability Review La Verne January 2018

Building a Smarter Grid for Southern California Southern California Edison is developing an electric grid to support California s transition to a clean and sustainable future that meets the needs and

2 Building a Smarter Grid for Southern California Southern California Edison is developing an electric grid to support California s transition to a clean and sustainable future that meets the needs and expectations of our customers. We are investing more than $13 billion in the power distribution grid over three years ( ). Our main investment goal is to increase power reliability through significant upgrades. The investments include: Upgrading cables, poles, switches and transformers Updating the grid so it can accommodate new technologies, such as smart inverters that will allow for the twoway flow of solar energy Adapting the power system to accommodate future California policy related to energy storage, electric transportation and renewable energy Providing enhanced automation and monitoring devices to allow us to better respond to changes on the grid Our investments in local communities will help ensure that customers receive safe, reliable, and affordable electricity now and in the future. Learn more at edison.com/innovation 2

3 Understanding Your Reliability Report As your electric utility, we want you to always have power when you need it. To get there, we constantly track and monitor electric outages across our service territory, and we measure our system reliability from this data. The two metrics we rely on are common in the electric utility industry: the System Average Interruption Duration Index (SAIDI) and the System Average Interruption Frequency Index (SAIFI). Both are described in more detail on the next page. Replacing and upgrading our infrastructure will help SCE maintain or improve SAIDI and SAIFI measurements. This report provides historical reliability data for the circuits that serve your jurisdiction and our proposed infrastructure upgrades for the current year. To view other reliability reports, visit sce.com>outage Center>Maintaining Reliable Service 3

4 Reliability Metrics MOMENTARY OUTAGES: OUTAGES LASTING 5 MINUTES OR LESS SUSTAINED OUTAGES: OUTAGES LASTING LONGER THAN 5 MINUTES MAIFI: o The number of times the average customer is interrupted by Momentary outages each year. SAIFI: o The number of times the average customer is interrupted by Sustained outages each year. SAIDI: o The cumulative amount of time the average customer is interrupted by Sustained outages each year. 4

5 Cities in the COVINA District CityList1 AVOCADO HEIGHTS AZUSA CHARTER OAK CITRUS CLAREMONT COVINA DIAMOND BAR GLENDORA HACIENDA HEIGHTS INDUSTRY LA PUENTE LA VERNE POMONA ROWLAND HEIGHTS SAN DIMAS SOUTH SAN JOSE HILLS VALINDA VINCENT WALNUT WEST COVINA WEST PUENTE VALLEY 5

6 * Exclusions are days which utilities are allowed to remove from their metrics because the outages on those days were caused by a severe acts of nature. **In the columns showing Rank, lower numbers indicate poorer performance. 6

7 Overview of La Verne CircuitList1 There are 19 circuits that serve La Verne 1 Circuit Type Customers Circuit Type Customers Circuit Type Customers Circuit Type Customers AVENIDA(12KV) 1, BILL(12KV) BOYALTA(12KV) 1, BRACKETT(12KV) 1, BRYDON(12KV) 1, CAL POLY(12KV) 1, DURWARD(12KV) FOOTHILL(12KV) 1, KRANZER(12KV) 1, LIMBER(12KV) 1, LIMING(12KV) 1, MORAN(12KV) 1, NEMAHA(4.16KV) PALMER(12KV) 1, PUDDINGSTONE(12KV) QUAKER(4.16KV) RHOADS(12KV) 2, SAM(12KV) 1, WINTHROP(12KV) 1, Grand Total 23,603 7

Reliability History of Circuits Serving La Verne (No Exclusions) BarChart 2014 2015 2016 2017 SAIDI (average minutes of sustained interruptions) 160.0 140.0 120.0 100.0 80.0 60.0 40.0 20.0 112.1 114.

8 Reliability History of Circuits Serving La Verne (No Exclusions) BarChart SAIDI (average minutes of sustained interruptions) La Verne 0.0 SAIFI (average frequency of sustained interruptions) SCE SYSTEMWIDE ** Exclusions are days which utilities are allowed to MAIFI (average frequency of momentary interruptions) remove from their metrics because the outages on those days were caused by acts of nature. **Data is as of 02/20/2018, data can be slightly different due to outage data validation process 0.0 8

9 Causes of Repair Outages in La Verne 2017 SAIDIChart Contributions to SAIDI by Outage Cause Other 0.4% Equipment Failure e.g., in-service failure of transformer, switch, or conductors Vegetation/Animal e.g., tree branch, rodent, or bird causing a short circuit between conductors Other e.g., patrolled but no cause found Operations e.g., urgent maintenance w/o 3-day notice 3 rd Party e.g., balloon, car hit pole, dig-in Vegetation /Animal 5.5% Operation 13.2% Weather /Fire /Earthquake 17.2% 3rd Party 24.3% Equipment Failure 39.5% 3rd Party Equipment Failure Operation Other Vegetation /Animal Weather /Fire /Earthquake SAIDI = the cumulative amount of time the average customer is interrupted by sustained outages each year. 9

10 Causes of Repair Outages in La Verne 2017 SAIFIChart Contributions to SAIFI by Outage Cause Vegetation /Animal 4.6% Equipment Failure e.g., in-service failure of transformer, switch, or conductors Vegetation/Animal e.g., tree branch, rodent, or bird causing a short circuit between conductors Other e.g., patrolled but no cause found Operations e.g., urgent maintenance w/o 3-day notice 3 rd Party e.g., balloon, car hit pole, dig-in Other 4.8% Weather /Fire /Earthquake 14.2% Operation 29.3% 3rd Party 18.1% Equipment Failure 29.0% 3rd Party Equipment Failure Operation Other Vegetation /Animal Weather /Fire /Earthquake SAIFI = the number of times the average customer is interrupted by sustained outages each year 10

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13 Back-up Slides Reliability Histories of Circuits Serving La Verne Updated through Dec 2017

14 Average Reliability of 19 Circuits Serving La Verne CitySummary st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI 19 Circuits Serving La Verne -- Total Customers: 23, rd Party 17% 1% 9% 8% 2% 14% 35% 16% 13% 6% 33% 22% % % 32% 16% 24% 18% 18% Equipment Failure 52% 35% 1% 50% 45% 11% 44% 41% 8% 79% 47% 0% 49% 4% - 33% 37% 24% 25% 27% 11% 39% 29% 12% Operation 9% 24% 15% 11% 14% - 6% 9% 0% 7% 14% 6% 36% 67% - 26% 28% 3% 9% 21% - 13% 29% 2% Other 3% 5% 25% 10% 18% 52% 1% 1% 37% % 10% 28% 20% % 0% 0% 9% 0% 5% 30% Vegetation/Animal 14% 31% 41% 20% 20% 18% 5% 20% 31% 2% 1% 24% 0% 0% 23% 0% 0% 8% 10% 11% 55% 5% 5% 30% Weather/Fire/Earthquake 4% 3% 9% 0% 2% 5% 10% 13% 10% 7% 5% 15% 4% 1% - 41% 35% 10% 12% 9% 9% 17% 14% 9% SCE SYSTEMWIDE Notes: No outages are excluded from the metrics. Outage Causes: Other: e.g., patrolled but no cause could be found Operations: e.g., urgent maintenance w/o 3-day notice to customers 3 rd Party: e.g., balloons, car hit pole, dig-in Vegetation/Animal: e.g., tree branch, rodent, or bird causing short circuit across conductors SAIDI (minutes) = the cumulative amount of time the average customer is interrupted by sustained (longer than 5 minutes) outages. SAIFI (interruptions) = the number of times the average customer is interrupted by sustained outages. MAIFI (interruptions) = the number of times the average customer is interrupted by momentary " (lasting 5 minutes or less) outages. 14

15 Reliability Histories for Individual Circuits Serving La Verne - 1 of st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI AVENIDA(12KV) - Customers: 1, CircuitHistory rd Party % 8% % % 4% - 7% 4% - Equipment Failure 41% 25% - 70% 86% - 89% 86% 100% 89% 86% 50% Operation 1% 1% 33% 3% 5% - 4% 7% % 25% - 4% 10% - 4% 10% - Other - 100% % 100% - 50% Vegetation/Animal 58% 75% 67% 1% 1% % % 75% 1% 0% - Weather/Fire/Earthquake % 93% BILL(12KV) - Customers: rd Party Equipment Failure % 100% % 100% 100% 100% 99% - 100% 100% 48% Operation % 100% - 0% 1% - 0% 0% - Other 45% 40% - 100% % Vegetation/Animal 55% 60% 100% - Weather/Fire/Earthquake BOYALTA(12KV) - Customers: 1, rd Party Equipment Failure 9% 2% 2% 1% 100% 100% - 94% 50% 94% 63% - Operation % 100% 100% 100% 6% 50% 6% 37% - Other Vegetation/Animal 91% 98% 98% 99% 100% % Weather/Fire/Earthquake BRACKETT(12KV) - Customers: 1, rd Party Equipment Failure % 87% 21% 89% 89% 47% Operation % 9% Other % 0% 4% 52% % Vegetation/Animal % % 3% 4% % 100% Weather/Fire/Earthquake - - 7% 7% 15

16 Reliability Histories for Individual Circuits Serving La Verne - 2 of 5 CircuitHistory st Qtr nd Qtr rd Qtr th Qtr 2017 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI 2017 BRYDON(12KV) - Customers: 1, rd Party % 20% 29% 18% 10% % 97% - 82% 87% - Equipment Failure 35% 6% 5% 91% 93% % 50% % 1% - Operation 19% 26% 45% 1% 1% 82% 90% 100% 100% 16% 7% - Other 2% 1% 2% % 14% 20% 29% 100% 1% 0% - 0% 0% 3% Vegetation/Animal 10% 44% 3% 8% 6% 3% 42% 59% 43% - 1% 3% 100% 1% 3% 97% Weather/Fire/Earthquake 34% 23% 45% - 64% 50% % 1% - CAL POLY(12KV) - Customers: 1, rd Party 100% 100% 100% % 100% 100% % Equipment Failure - 100% 100% % 33% - Operation % 100% % - 6% 1% - 1% 0% - Other - 48% - 100% - 50% - 50% Vegetation/Animal - 52% % 94% 99% - 17% 33% 25% Weather/Fire/Earthquake % 100% 28% 33% - DURWARD(12KV) - Customers: rd Party Equipment Failure 51% 47% 7% - 100% 100% % 100% - Operation 26% 3% - 100% 100% - 100% 100% Other 1% 0% 47% - Vegetation/Animal 22% 49% 46% - Weather/Fire/Earthquake FOOTHILL(12KV) - Customers: 1, rd Party Equipment Failure - - 1% 0% 96% 85% % 47% - Operation 100% 100% 24% 100% 100% - 13% 8% - 100% 100% - 4% 15% - 100% 100% - 100% 100% - 28% 53% - Other % % % Vegetation/Animal % % 22% 61% 45% % % Weather/Fire/Earthquake % 30% 16

17 Reliability Histories for Individual Circuits Serving La Verne - 3 of 5 CircuitHistory st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI KRANZER(12KV) - Customers: 1, rd Party % 100% - 100% 100% - Equipment Failure % 92% - 95% 95% Operation % 25% 8% Other - 50% 5% 5% 50% Vegetation/Animal % % % % % Weather/Fire/Earthquake LIMBER(12KV) - Customers: 1, rd Party Equipment Failure 97% 96% 0% % 59% 45% Operation 3% 4% 41% 55% Other % 97% 33% % Vegetation/Animal 0% 0% 100% 4% 3% Weather/Fire/Earthquake % 0% 34% - - LIMING(12KV) - Customers: 1, rd Party - 100% % % Equipment Failure 4% 1% % Operation 95% 99% - 100% 100% 100% 100% - Other Vegetation/Animal 1% 0% - 100% 100% Weather/Fire/Earthquake MORAN(12KV) - Customers: 1, rd Party % 47% Equipment Failure 100% 100% - 94% 99% - 37% 24% Operation % 1% Other % - 34% - 100% 100% Vegetation/Animal % 29% 66% Weather/Fire/Earthquake 17

18 Reliability Histories for Individual Circuits Serving La Verne - 4 of 5 CircuitHistory st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI NEMAHA(4.16KV) - Customers: rd Party % 30% 41% 100% 100% Equipment Failure Operation - 7% 66% - 100% 100% % 80% - Other - 30% - - Vegetation/Animal Weather/Fire/Earthquake % 70% 30% 100% 100% 100% 93% 34% % 20% - PALMER(12KV) - Customers: 1, rd Party % % 45% 47% % % 3% - 0% 0% 80% Equipment Failure 100% 99% - 56% 44% 22% 51% 31% % 2% - 71% 56% - 18% 2% - Operation % 0% - 3% 21% % % 98% 75% 57% 20% Other 98% 100% % 40% - Vegetation/Animal 0% 1% - 44% 56% % 0% 27% 41% - 2% 1% - Weather/Fire/Earthquake PUDDINGSTONE(12KV) - Customers: rd Party Equipment Failure - 100% 100% 100% 50% 100% 100% 0% - 28% 50% 0% Operation Other 50% Vegetation/Animal Weather/Fire/Earthquake % 100% % 100% - 72% 50% 100% QUAKER(4.16KV) - Customers: rd Party % 50% Equipment Failure 100% 100% - - Operation % 100% % 100% % 100% 100% - 100% 100% 50% Other Vegetation/Animal Weather/Fire/Earthquake 18

19 Reliability Histories for Individual Circuits Serving La Verne - 5 of 5 CircuitHistory st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI RHOADS(12KV) - Customers: 2, rd Party Equipment Failure % 100% % 78% 33% % 69% 21% Operation % 26% 5% - - 1% 22% 1% 19% - Other % 57% 87% 80% % 67% - 43% Vegetation/Animal % 16% 9% 20% % 100% 100% 100% 100% 13% 12% 35% Weather/Fire/Earthquake SAM(12KV) - Customers: 1, rd Party - 94% 100% 100% % % 33% 40% Equipment Failure 41% 4% - 1% 0% - 49% 2% Operation 46% 92% - 1% 0% - 3% 1% - 6% 0% % 100% - 59% 33% - Other 13% 5% % % % Vegetation/Animal % 100% - 45% 97% Weather/Fire/Earthquake - - 2% 0% 100% % 100% 100% % 23% 33% 40% WINTHROP(12KV) - Customers: 1, rd Party % 94% 30% Equipment Failure 79% 74% 0% 0% Operation 19% 25% - 14% 36% - 0% 0% - 100% 100% - 100% 100% - 100% 100% 100% 100% - Other 2% 1% % Vegetation/Animal % 64% - 0% 0% Weather/Fire/Earthquake - - 8% 5% 35%

Circuit Reliability Review

Circuit Reliability Review Rancho Santa Margarita January 2018 Building a Smarter Grid for Southern California Southern California Edison is developing an electric grid to support California s transition