Circuit Reliability Review

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Clyde Farmer
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1 Circuit Reliability Review Claremont 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 bya severe acts of nature. **In the columns showing Rank, lower numbers indicate poorer performance. 6

7 Overview of Claremont CircuitList1 There are 19 circuits that serve Claremont 1 Circuit Type Customers Circuit Type Customers Circuit Type Customers Circuit Type Customers ALAMOSA(12KV) 2, ANAWALT(12KV) 2, BASELINE(12KV) 1, BIG CONE(12KV) 1, BONTANIC(12KV) CALSPAR(12KV) 1, FERRARA(12KV) 1, FORBES(12KV) 1, KINGSLEY(12KV) 2, LEHIGH(12KV) 2, LIMBER(12KV) 1, MOAB(4.16KV) NEIBEL(12KV) 1, PADOVA(12KV) 1, PALMER(12KV) 1, PITZER(12KV) 1, POMALL(12KV) 2, ROCK(12KV) 2, WINTHROP(12KV) 1, Grand Total 31,573 7

Reliability History of Circuits Serving Claremont (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 20.0 125.5 112.

8 Reliability History of Circuits Serving Claremont (No Exclusions) BarChart SAIDI (average minutes of sustained interruptions) Claremont 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 Claremont 2017 SAIDIChart Other 1.9% Vegetation /Animal Contributions to SAIDI by Outage Cause 5.8% Weather /Fire /Earthquake 0.2% 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 Operation 17.0% Equipment Failure 57.8% 3rd Party 17.3% 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 Claremont 2017 SAIFIChart Vegetation /Animal 5.2% Weather /Fire /Earthquake 0.3% Contributions to SAIFI by Outage Cause 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 7.8% Operation 33.5% 3rd Party 24.9% Equipment Failure 28.3% 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 Claremont Updated through Dec 2017

14 Average Reliability of 19 Circuits Serving Claremont 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 Claremont -- Total Customers: 31, rd Party 7% 6% 9% 8% 2% 17% 27% 17% 3% 32% 74% 32% 16% 26% 50% 16% 20% 16% 14% 8% 34% 17% 25% 33% Equipment Failure 69% 63% 21% 42% 21% 17% 27% 25% 22% 45% 4% - 67% 12% 0% 54% 32% 30% 58% 64% 8% 58% 28% 10% Operation 11% 14% 6% 23% 55% 8% 10% 6% 6% 2% 2% 23% 11% 36% 3% 29% 48% 28% 1% 1% - 17% 33% 13% Other 0% 1% 20% 8% 10% 15% 6% 7% 26% - - 9% 1% 21% 23% % 10% 15% 29% 2% 8% 22% Vegetation/Animal 10% 13% 43% 13% 11% 39% 24% 37% 32% 19% 17% 9% 4% 5% 24% 0% 1% - 17% 12% 29% 6% 5% 15% Weather/Fire/Earthquake 3% 4% 2% 6% 1% 4% 8% 8% 11% 3% 4% 27% - 0% 0% 6% 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 Claremont - 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 ALAMOSA(12KV) - Customers: 2, CircuitHistory1 3rd Party 33% 40% 10% % 5% 4% % 95% 100% % 49% 33% Equipment Failure 3% 1% - 89% 66% - 8% 6% % 5% - 100% 100% 100% 66% 51% 67% Operation 14% 7% - 5% 18% - 48% 26% Other - - 2% 8% 50% Vegetation/Animal 49% 52% 90% 6% 16% 50% 36% 56% 50% Weather/Fire/Earthquake ANAWALT(12KV) - Customers: 2, rd Party 1% 2% - - Equipment Failure 89% 95% 44% 60% 19% Operation % 81% % 100% - 100% 100% 18% 100% 100% - 92% 83% 10% Other - 82% - 45% Vegetation/Animal 10% 3% 56% % % 100% % - - 8% 17% 45% Weather/Fire/Earthquake BASELINE(12KV) - Customers: 1, rd Party Equipment Failure 100% 100% - 100% 100% - 52% 27% 100% Operation - - 1% 0% - 100% - 63% Other % 73% % % Vegetation/Animal Weather/Fire/Earthquake BIG CONE(12KV) - Customers: 1, rd Party Equipment Failure 97% 56% - 100% 100% % 2% 18% 2% - Operation 3% 44% 0% % 1% 1% % 98% 50% % 95% 32% Other % % - 32% Vegetation/Animal % % 99% 100% - 100% 100% 100% 17% 3% 36% Weather/Fire/Earthquake 15

16 Reliability Histories for Individual Circuits Serving Claremont - 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 BONTANIC(12KV) - Customers: rd Party % 98% Equipment Failure 100% 100% 5% 1% 89% 51% - 100% 100% 100% % 40% 100% Operation - - 5% 1% Other Vegetation/Animal - 100% 100% - 11% 49% 100% 100% - 27% 60% - Weather/Fire/Earthquake CALSPAR(12KV) - Customers: 1, rd Party Equipment Failure 21% 45% 50% 57% 30% - 90% 38% % 63% 95% 63% - Operation 74% 52% - 34% 65% - 5% 38% % 37% 5% 37% - Other 5% 3% - 9% 5% % Vegetation/Animal 0% 0% 50% % 23% Weather/Fire/Earthquake FERRARA(12KV) - Customers: 1, rd Party 23% 4% 53% 64% 45% Equipment Failure 35% 42% - 32% 30% 100% % 100% 100% % 9% 5% Operation 13% 16% 37% 4% 26% - 62% 76% Other % % 0% 56% - 100% 100% 100% 58% 91% 95% Vegetation/Animal 29% 38% - 0% 0% Weather/Fire/Earthquake % 24% 44% FORBES(12KV) - Customers: 1, rd Party % 87% 100% % 81% 100% Equipment Failure 92% 97% 100% 0% 0% % 100% - 9% 13% 20% 19% - Operation 3% 1% - 100% 100% - 0% 0% Other % 27% Vegetation/Animal % 55% 100% Weather/Fire/Earthquake 5% 2% 20% 18% 16

17 Reliability Histories for Individual Circuits Serving Claremont - 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 KINGSLEY(12KV) - Customers: 2, rd Party % 1% 100% 100% 100% % 88% - 31% 39% 10% Equipment Failure 97% 98% 16% % 42% 47% % 97% 100% % 57% 59% Operation 3% 2% % 1% 1% % 3% 1% 1% - Other % 100% 100% 42% 7% 12% 100% 1% 1% 31% Vegetation/Animal 0% 0% % 40% 57% 53% Weather/Fire/Earthquake - 100% 100% - - 1% 2% - LEHIGH(12KV) - Customers: 2, rd Party % 67% Equipment Failure 98% 96% - 5% 0% % 89% % 89% - Operation 0% 1% - 38% 94% % % 3% 11% % 11% 33% Other 2% 3% 100% 100% Vegetation/Animal Weather/Fire/Earthquake % 6% 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% - - MOAB(4.16KV) - Customers: rd Party Equipment Failure 100% 100% - 100% 100% - 79% 34% - 100% 100% % 100% - Operation - 100% 15% 32% - 50% - 33% Other % % 2% - 50% - 33% Vegetation/Animal % % 31% 100% % % Weather/Fire/Earthquake 17

18 Reliability Histories for Individual Circuits Serving Claremont - 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 NEIBEL(12KV) - Customers: 1, rd Party - 50% - - Equipment Failure 84% 49% 36% 39% 15% 50% % 71% % 65% - Operation 9% 48% 64% % 100% - 1% 8% - Other % 85% % % % Vegetation/Animal 7% 3% 100% 100% % 11% 29% 100% % 27% 67% Weather/Fire/Earthquake PADOVA(12KV) - Customers: 1, rd Party Equipment Failure 95% 77% 11% 2% 100% 100% - 87% 50% 93% 59% - Operation 5% 23% - 1% 8% - 0% 0% Other % 78% 50% - 0% 0% Vegetation/Animal % 21% 42% 100% 88% 98% 100% % 50% 7% 41% - Weather/Fire/Earthquake 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 PITZER(12KV) - Customers: 1, rd Party % 67% Equipment Failure 91% 90% - 33% 9% Operation % 91% % 100% 25% 100% 100% 100% 100% 14% Other - 100% 75% 43% Vegetation/Animal 2% 7% 2% 1% Weather/Fire/Earthquake 7% 3% 43% 32% 100% % % 18

19 Reliability Histories for Individual Circuits Serving Claremont - 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 POMALL(12KV) - Customers: 2, rd Party - 100% 100% 100% 100% 94% 97% 100% Equipment Failure 11% 1% - 92% 76% - 100% 100% 100% 100% - 100% 100% 6% 3% - Operation 42% 6% - 8% 24% Other % - Vegetation/Animal Weather/Fire/Earthquake 48% 92% 27% - ROCK(12KV) - Customers: 2, rd Party Equipment Failure 0% 1% 50% 90% 35% - 91% 51% 45% % 94% 96% 94% - Operation 100% 99% - 7% 61% - 6% 29% Other 27% - 100% 33% Vegetation/Animal % 4% 4% - 4% 19% 27% - - 4% 6% % 4% 6% 33% Weather/Fire/Earthquake % % 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 Tehachapi 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