Circuit Reliability Review

Transcription

1 Circuit Reliability Review Torrance January 2018

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 SOUTH BAY District CityList1 ALONDRA PARK DEL AIRE EL SEGUNDO GARDENA HAWTHORNE HERMOSA BEACH INGLEWOOD LADERA HEIGHTS LAWNDALE LENNOX LOMITA LOS ANGELES MANHATTAN BEACH PALOS VERDES ESTATES RANCHO PALOS VERDES REDONDO BEACH ROLLING HILLS ROLLING HILLS ESTATES TORRANCE VIEW PARK-WINDSOR HILLS WEST ATHENS WESTMONT 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 Torrance CircuitList1 There are 85 circuits that serve Torrance 1 Circuit Type Customers Circuit Type Customers Circuit Type Customers Circuit Type Customers ADDIS(16KV) 3,131 EVANS(16KV) 1,346 PINZON(16KV) 1,152 - ANGELINA(16KV) 1,392 EZRA(4.16KV) 1,032 PUEBLO(16KV) 1,012 - ARTISANO(16KV) 531 FIRETHORN(16KV) 2,587 RADIATOR(16KV) ARVANA(16KV) 3,367 FIRMONA(16KV) 1,897 REDGUM(16KV) 14 - ASPEN(16KV) 1,612 FREEMAN(4.16KV) 1,200 RIDGELAND(4.16K AZALIA(4.16KV) 771 GEM(4.16KV) 671 RIVET(4.16KV) AZURE(4.16KV) 965 GENERAL PETROLEUM(16K 308 ROSEMARY(4.16KV 1,160 - BARGE(4.16KV) 1,204 GIRDER(4.16KV) 1,254 SAGO(16KV) 3,700 - BENHILL(16KV) 1,079 GRAVEYARD(16KV) 1,391 SELVA(16KV) 1,965 - BLACKJACK(16KV) 246 HALLDALE(16KV) 2,743 SILICONE(16KV) 2,244 - BLAKE(16KV) 3,342 HICKORY(4.16KV) 513 STATLER(16KV) 1,667 - BLOCKER(16KV) 4,538 HILLSIDE(16KV) 436 STRAWBERRY( BRAMBLE(16KV) 57 ILLINOIS(4.16KV) 1,056 STRINGER(4.16KV) 1,228 - BRYANT(16KV) 159 KING(16KV) 3,802 SUMP(4.16KV) CABRILLO(4.16KV) 498 LILAC(4.16KV) 502 TALENT(4.16KV) CARNELIAN(16KV) 4,909 LLEWELLYN(4.16KV) 1,000 TEAK(16KV) CATALINA(4.16KV) 931 LOMITA(16KV) 159 TENOR(4.16KV) 1,001 - CHICO(16KV) 2,989 LOQUAT(16KV) 2,922 TERRAZZO(4.16KV CLIFTON(4.16KV) 982 MADERA(4.16KV) 940 TOURMALINE( CODONA(4.16KV) 338 MAJOR(4.16KV) 824 TRUSS(4.16KV) 1,500 - COMO(4.16KV) 1,027 MANUEL(4.16KV) 911 VALMONTE(4.16KV CORAL(4.16KV) 289 MARCELLINA(4.16KV) 353 VILLA(4.16KV) 1,438 - CRENSHAW(4.16KV) 1,106 MIRALESTA(16KV) 75 VIOLET(4.16KV) DAHLIA(4.16KV) 967 MOON(4.16KV) 1,401 WINLOCK(16KV) 1,548 - DELID(4.16KV) 1,167 NARBONNE(4.16KV) 1,106 ZEPHER(16KV) DOGWOOD(16KV) 3,919 NELSON(16KV) 3, DOMINGUEZ(16KV) 1,510 OCCIDENTAL(16KV) EBONY(16KV) 4,179 ORCHID(4.16KV) ELLENWOOD(16KV) 943 PANSY(4.16KV) ELROY(16KV) 641 PETROL(16KV) Grand Total 111,803 7

8 Reliability History of Circuits Serving Torrance (No Exclusions) BarChart SAIDI (average minutes of sustained interruptions) Torrance SCE SYSTEMWIDE SAIFI (average frequency of sustained interruptions) ** 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 Torrance 2017 SAIDIChart Vegetation /Animal 3.1% Weather /Fire /Earthquake 4.8% Contributions to SAIDI 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 Operation 9.0% Other 7.4% 3rd Party 11.3% Equipment Failure 64.3% 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 Torrance 2017 SAIFIChart 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 9.8% Operation 13.6% Vegetation /Animal 6.5% Weather /Fire /Earthquake 8.2% 3rd Party 9.2% Equipment Failure 52.7% 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 Torrance Updated through Dec 2017

14 Average Reliability of 85 Circuits Serving Torrance 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 85 Circuits Serving Torrance -- Total Customers: 111, rd Party 13% 14% 12% 18% 20% 28% 11% 9% 25% 25% 21% 34% 4% 6% 29% 2% 0% 21% 5% 3% 12% 11% 9% 26% Equipment Failure 51% 43% 17% 44% 45% 13% 38% 39% 20% 45% 32% 25% 80% 67% 28% 84% 80% 53% 64% 44% 52% 64% 53% 36% Operation 5% 3% 5% 4% 9% 1% 16% 30% 8% 11% 21% 27% 5% 7% 6% 5% 3% - 13% 20% 11% 9% 14% 14% Other 17% 26% 41% 19% 10% 32% 17% 9% 20% 10% 15% 6% 7% 6% 17% 8% 12% 15% 3% 3% 5% 7% 10% 10% Vegetation/Animal 2% 1% 13% 7% 9% 24% 3% 5% 20% 0% 0% 0% 4% 13% 20% 2% 6% 6% 7% 11% 19% 3% 6% 10% Weather/Fire/Earthquake 13% 12% 13% 8% 7% 2% 14% 8% 8% 8% 12% 7% % 8% 19% - 5% 8% 3% 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 Torrance - 1 of 22 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI ADDIS(16KV) - Customers: 3, CircuitHistory rd Party % Equipment Failure % 99% - 2% 0% % 100% 100% 100% 100% % 100% 100% Operation 100% 100% - 0% 1% - 24% 50% Other % 74% 50% ANGELINA(16KV) - Customers: 1, rd Party % 99% 51% Equipment Failure % 1% - 17% 2% Operation % 98% 100% 100% 100% % 100% - Other 100% 100% % ARTISANO(16KV) - Customers: rd Party % 69% 47% 2% Equipment Failure Operation % 53% 2% Other % Vegetation/Animal % 0% Weather/Fire/Earthquake 100% 100% 3% % ARVANA(16KV) - Customers: 3, rd Party % 40% - 61% 45% 100% 100% 100% 100% % 48% 15% Equipment Failure 99% 100% 100% 1% 1% % 98% % 100% 100% 81% 52% 85% Operation 1% 0% - 2% 20% - 17% 50% % 2% % 0% - 0% 0% - Other % 17% 100% 22% 5% Weather/Fire/Earthquake % 22%

16 Reliability Histories for Individual Circuits Serving Torrance - 2 of 22 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 ASPEN(16KV) - Customers: 1, Equipment Failure 69% 3% - 36% 41% - 45% 52% - 61% 53% 100% % 37% 9% Operation % 48% - 39% 47% % 100% - 100% 100% - 33% 42% - Other 31% 97% 100% % % % Vegetation/Animal % 59% % % 100% % 21% - AZALIA(4.16KV) - Customers: rd Party 95% 99% Equipment Failure 5% 1% - 100% 100% % 52% 33% 100% 100% 100% % 55% 49% Operation % 100% - 5% 48% 67% % 45% 51% Other AZURE(4.16KV) - Customers: rd Party % 45% Equipment Failure 47% 53% - 28% 10% - 10% 3% 100% % 97% - 47% 55% - Operation % 2% - 100% 100% - 100% 100% % 3% - 53% 45% - Other 53% 47% 100% % 95% Weather/Fire/Earthquake % 46% BARGE(4.16KV) - Customers: 1, rd Party % 48% 16% Equipment Failure % 17% 14% 26% 64% 67% 50% % 100% - 77% 47% - Operation % 1% - 36% 33% % 100% % 53% - Other % 37% 58% %

17 Reliability Histories for Individual Circuits Serving Torrance - 3 of 22 CircuitHistory 3 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI BENHILL(16KV) - Customers: 1, Equipment Failure % 100% 100% % 56% - 96% 68% 100% Operation 100% 100% % 100% % 44% - 4% 32% - Other % Vegetation/Animal % % 0% 100% BLACKJACK(16KV) - Customers: Equipment Failure % 94% - 1% 0% % 100% % 97% - Operation % 6% - 99% 100% % 100% % 3% - Other % Vegetation/Animal % BLAKE(16KV) - Customers: 3, rd Party % 96% 100% Equipment Failure 98% 99% 100% 100% 100% 100% % 100% - 79% 46% % 0% - Operation 2% 1% % 4% - 100% 100% % 54% - 100% 100% - 95% 100% - Other Vegetation/Animal % % BLOCKER(16KV) - Customers: 4, rd Party 82% 98% 33% % % 14% % 2% - Equipment Failure 12% 1% - 90% 96% 59% 10% 2% - 7% 2% - 98% 88% - 38% 86% - 66% 80% - 76% 55% - Operation % 1% - 24% 32% 49% 5% 4% - 2% 12% 100% % 20% - 4% 8% 100% Other % 9% 4% - 15% 3% Vegetation/Animal % % 30% 51% Weather/Fire/Earthquake 6% 2% % 32% - 88% 95% % 35% - 17

18 Reliability Histories for Individual Circuits Serving Torrance - 4 of 22 CircuitHistory 4 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI BRAMBLE(16KV) - Customers: Equipment Failure Operation Other % Vegetation/Animal % BRYANT(16KV) - Customers: Equipment Failure % 41% % 100% % 80% - Operation 14% 51% Other Vegetation/Animal 86% 49% 100% 46% 59% 100% 100% 100% 100% 100% 100% % 20% - CABRILLO(4.16KV) - Customers: Equipment Failure Operation Other 100% 100% 100% Vegetation/Animal % Weather/Fire/Earthquake % 100% 62% CARNELIAN(16KV) - Customers: 4, rd Party % 0% 50% % 100% 100% % 17% 82% Equipment Failure 100% 100% 50% 99% 99% - 64% 52% 52% % 88% 100% 40% 30% - 18% 71% 18% Operation 0% 0% - 0% 1% - 30% 45% % 12% - 60% 70% - 7% 12% - Other % 7% 2% 48% Weather/Fire/Earthquake %

19 Reliability Histories for Individual Circuits Serving Torrance - 5 of 22 CircuitHistory 5 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI CATALINA(4.16KV) - Customers: rd Party % 44% 8% 100% Equipment Failure 100% 100% - 100% 100% - 13% 3% % 100% - 100% 100% - 25% 8% - Operation % % 89% % 100% % 1% - Other % Weather/Fire/Earthquake % 100% % 91% - CHICO(16KV) - Customers: 2, rd Party % 1% 50% Equipment Failure 8% 16% - 34% 12% 59% 49% 26% % 92% - 100% 100% % 28% - Operation 24% 12% - 22% 21% - 44% 66% 50% % 8% % 100% - 40% 72% - Other 68% 72% 100% 0% 0% 41% 7% 7% Weather/Fire/Earthquake % 67% CLIFTON(4.16KV) - Customers: rd Party % % 3% 100% % % 3% 100% Equipment Failure % 52% % 97% - 100% 100% % 91% - Operation % 45% - 100% 100% % 100% - 6% 7% - Other % 3% 50% CODONA(4.16KV) - Customers: rd Party % 100% Equipment Failure % 100% % 100% - Operation 100% 100% 67% Other % 100% 100% 100% % % Vegetation/Animal % % 19

20 Reliability Histories for Individual Circuits Serving Torrance - 6 of 22 CircuitHistory 6 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI COMO(4.16KV) - Customers: 1, rd Party % % % Equipment Failure 36% 69% - 41% 11% Operation % 89% - 100% 100% - 100% 100% % 100% - Other % % Vegetation/Animal % Weather/Fire/Earthquake 64% 31% 39% CORAL(4.16KV) - Customers: Equipment Failure % 100% 100% % % Operation % 100% Other % CRENSHAW(4.16KV) - Customers: 1, rd Party % % % Equipment Failure 22% 25% - 96% 50% % 100% % 100% - Operation 78% 75% - 4% 50% Other Vegetation/Animal % DAHLIA(4.16KV) - Customers: rd Party % % 100% 100% Equipment Failure % 100% - 100% 100% - 71% 13% - Operation % 100% % 100% 67% % 87% 67% Other % % % 20

21 Reliability Histories for Individual Circuits Serving Torrance - 7 of 22 CircuitHistory 7 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI DELID(4.16KV) - Customers: 1, rd Party 100% 100% 47% % % 100% % 94% - Equipment Failure % 1% Operation % 60% % 100% - 4% 6% - Other % 44% 39% 46% % % DOGWOOD(16KV) - Customers: 3, rd Party 14% 7% 19% % 21% 47% % 20% 47% Equipment Failure 68% 45% 0% 96% 84% - 100% 100% - 68% 25% 53% 5% 4% - 100% 100% % 26% 53% Operation % 3% - 0% 0% Other 18% 48% 40% 1% 1% % 54% 0% 95% 96% % 54% 0% Vegetation/Animal % 2% 12% 100% % DOMINGUEZ(16KV) - Customers: 1, rd Party % 1% Equipment Failure 39% 52% - 100% 99% - 66% 23% 50% % 100% - 100% 100% - Operation 61% 48% % 77% 50% Other EBONY(16KV) - Customers: 4, rd Party % 29% Equipment Failure 69% 47% 2% 25% 17% - 80% 91% 40% % 100% - 100% 100% 100% 50% 80% 68% Operation 0% 0% % 8% 19% 100% 100% 100% % 20% 32% Other 31% 53% 98% 68% 54% Vegetation/Animal % 0% 1% 41%

22 Reliability Histories for Individual Circuits Serving Torrance - 8 of 22 CircuitHistory 8 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI ELLENWOOD(16KV) - Customers: Equipment Failure 100% 100% - 6% 1% 100% 100% 100% % 100% % 100% - Operation % 6% Other Vegetation/Animal % 91% 92% ELROY(16KV) - Customers: rd Party % 100% - 86% 27% - Equipment Failure 95% 69% 41% 91% 87% 69% 98% 98% 100% Operation 2% 1% - 0% 2% - 2% 2% - 100% 100% % 100% % 73% - Other 3% 30% Vegetation/Animal % 9% 11% 31% % % EVANS(16KV) - Customers: 1, Equipment Failure 99% 98% 100% % 100% 100% 1% 0% % 1% 33% Operation 1% 2% - 100% 100% - 100% 100% % 0% % 0% - Other Vegetation/Animal % 100% 100% % 50% 33% Weather/Fire/Earthquake % 100% 100% % 50% 33% EZRA(4.16KV) - Customers: 1, rd Party % % 30% 22% 33% % % % Equipment Failure 100% 100% - 80% 41% - 25% 44% 33% Operation % 59% - 45% 35% - 100% 100% % 100% - Other % % % Weather/Fire/Earthquake % % 22

23 Reliability Histories for Individual Circuits Serving Torrance - 9 of 22 CircuitHistory 9 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI FIRETHORN(16KV) - Customers: 2, rd Party % Equipment Failure 29% 27% - 4% 1% % 92% 100% 71% 24% - 89% 86% 100% Operation % 47% Other 16% 36% 39% % % Vegetation/Animal 0% 0% - 96% 99% 17% % % 8% - 29% 76% - 11% 14% - Weather/Fire/Earthquake 54% 36% 61% % 53% FIRMONA(16KV) - Customers: 1, rd Party % 8% Equipment Failure 84% 84% - 47% 3% % 12% % 8% - Operation 16% 16% % 4% - 80% 88% % 100% - 31% 63% - Other % Vegetation/Animal % 88% 50% 86% 96% % 100% 100% % 29% 100% FREEMAN(4.16KV) - Customers: 1, rd Party % % Equipment Failure % 50% % 2% % 2% - Operation % 100% Other % 98% % 98% - Vegetation/Animal % 24% 50% Weather/Fire/Earthquake % 26% GEM(4.16KV) - Customers: Equipment Failure % % 100% % 100% - Operation 100% 100% Other % 100% 50% % % 23

24 Reliability Histories for Individual Circuits Serving Torrance - 10 of st Qtr nd Qtr rd Qtr 2017 CircuitHistory10 4th 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 GENERAL PETROLEUM(16KV) - Customers: Equipment Failure 98% 98% % 100% % 86% 67% % 84% 67% Operation 2% 2% % 100% % 14% % 16% - Other % % % % Vegetation/Animal % 100% 100% GIRDER(4.16KV) - Customers: 1, rd Party 96% 97% Equipment Failure 4% 2% % 59% 100% % 100% % 45% - Operation 0% 1% % 41% % 100% % 55% - Other % % % GRAVEYARD(16KV) - Customers: 1, rd Party 5% 4% - 7% 30% Equipment Failure 90% 90% 60% 74% 35% - 76% 51% % 96% 32% % 100% - 80% 95% 19% Operation 5% 5% - 1% 2% % 4% - 100% 100% % 5% - Other % % % % Vegetation/Animal % 33% 100% 24% 49% 50% % 0% 68% % 0% 41% HALLDALE(16KV) - Customers: 2, rd Party 100% 100% - 73% 49% 2% 12% 1% 71% 100% 100% 100% % 33% 51% Equipment Failure % 48% 2% 33% 29% 15% % 1% % 0% - Operation % 1% 1% - 56% 70% Other % % 99% % 33% - Vegetation/Animal % % % % 100% % 7% 34% 49% Weather/Fire/Earthquake % 3%

25 Reliability Histories for Individual Circuits Serving Torrance - 11 of 22 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI CircuitHistory11 SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI HICKORY(4.16KV) - Customers: rd Party 15% 4% % Equipment Failure % 1% 0% Operation Other 6% 48% 100% % 100% Vegetation/Animal 79% 48% % HILLSIDE(16KV) - Customers: rd Party % 36% 15% 100% Equipment Failure % 100% 34% Operation % 85% % 100% % 100% - Other % ILLINOIS(4.16KV) - Customers: 1, rd Party 16% 46% - 12% 17% - 21% 47% 50% Equipment Failure 45% 8% 100% 44% 35% % 100% - 100% 100% % 68% - Operation % 20% - 22% 6% - 100% 100% % 32% - Other 39% 46% - 18% 28% Weather/Fire/Earthquake % 47% 50% KING(16KV) - Customers: 3, rd Party % 15% 25% Equipment Failure 1% 0% - 4% 2% - 45% 45% 100% 100% 100% 100% 100% 100% - 100% 100% % 97% 100% Operation % 1% - 14% 28% % 100% - 6% 3% - Other % 81% 75% Weather/Fire/Earthquake 99% 100% % 27%

26 Reliability Histories for Individual Circuits Serving Torrance - 12 of 22 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI CircuitHistory12 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI LILAC(4.16KV) - Customers: rd Party % Equipment Failure 1% 2% Operation % 100% 100% 100% 100% % 100% 100% Other 99% 98% Weather/Fire/Earthquake % 100% LLEWELLYN(4.16KV) - Customers: 1, Equipment Failure % 3% Operation % 100% % 100% - Other 100% 100% 100% % 97% 50% Vegetation/Animal % LOMITA(16KV) - Customers: Equipment Failure % 91% - 100% 100% % 91% % 91% - Operation % 9% % 9% % 9% - Other LOQUAT(16KV) - Customers: 2, rd Party % 26% 79% % % Equipment Failure % 91% - 93% 73% 1% 89% 97% 100% % 100% 100% 100% 100% - 83% 93% 39% Operation 4% 0% - 4% 9% - 2% 1% - 11% 3% - 91% 90% % 16% 6% 30% Other 96% 100% 100% Vegetation/Animal % 0% 20% % 10% % 0% - 26

27 Reliability Histories for Individual Circuits Serving Torrance - 13 of 22 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI CircuitHistory13 SAIFI MAIFI SAIDI SAIFI MAIFI MADERA(4.16KV) - Customers: rd Party % % % Equipment Failure % 99% - 100% 100% % 65% % 65% - Operation % 1% % 35% % 35% - Other % MAJOR(4.16KV) - Customers: rd Party % Equipment Failure % 85% - 38% 32% Operation % 15% - 0% 0% - 1% 1% - 100% 100% % 2% - Other % 33% 50% Vegetation/Animal 100% 100% 100% % 33% 50% Weather/Fire/Earthquake % 2% - 99% 99% 100% % 98% 100% MANUEL(4.16KV) - Customers: rd Party % 8% % % 27% - 5% 7% 100% Equipment Failure % 80% 91% 100% % 95% % 2% - 65% 49% - Operation % 2% - 100% 100% - 3% 5% - 100% 100% % 27% - Other 100% 100% 67% % 71% - 19% 17% - MARCELLINA(4.16KV) - Customers: Equipment Failure Operation Other 100% 100% 100% % % Vegetation/Animal %

28 Reliability Histories for Individual Circuits Serving Torrance - 14 of 22 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI CircuitHistory14 SAIFI MAIFI SAIDI SAIFI MAIFI MIRALESTA(16KV) - Customers: Equipment Failure Operation Other Weather/Fire/Earthquake % 100% MOON(4.16KV) - Customers: 1, rd Party % Equipment Failure Operation % 100% 100% - 0% 1% Other % % % Vegetation/Animal % % Weather/Fire/Earthquake % 99% 100% NARBONNE(4.16KV) - Customers: 1, rd Party % 17% - 27% 49% % % Equipment Failure % 3% - 8% 2% % 100% % 56% - Operation 100% 100% - 15% 81% % 100% - 19% 44% - Other % 49% NELSON(16KV) - Customers: 3, rd Party % 14% 44% Equipment Failure 74% 58% 26% 0% 0% - 27% 14% % 100% % 60% - Operation 1% 0% - 6% 6% - 26% 67% % 100% - 9% 40% - Other 2% 5% % Weather/Fire/Earthquake 24% 36% 74% 76% 80% 15% 47% 20% 100%

29 Reliability Histories for Individual Circuits Serving Torrance - 15 of 22 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI CircuitHistory15 SAIFI MAIFI SAIDI SAIFI MAIFI OCCIDENTAL(16KV) - Customers: rd Party 100% 100% 100% 61% 50% 16% % % Equipment Failure % 33% Operation % 17% - 24% 67% - 100% 100% - 100% 100% % 100% - Other % % % Vegetation/Animal % 33% 61% ORCHID(4.16KV) - Customers: rd Party % % Equipment Failure % 100% % 2% 33% % 100% - 96% 46% 33% Operation 100% 100% % 98% 67% % 54% 67% Other PANSY(4.16KV) - Customers: Equipment Failure % 100% Operation % 100% 100% % 100% - 100% 100% 100% Other PETROL(16KV) - Customers: Equipment Failure % 100% 100% % 100% 22% Operation 25% 13% % 4% % % % Other % % 96% 100% Vegetation/Animal 75% 87% - 100% 100% 50% Weather/Fire/Earthquake %

30 Reliability Histories for Individual Circuits Serving Torrance - 16 of 22 CircuitHistory16 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI PINZON(16KV) - Customers: 1, Equipment Failure % 100% 100% 85% 81% % 12% - 88% 50% % 41% - Operation 100% 100% % 4% % 88% - 12% 50% % 59% - Other % Vegetation/Animal % 15% Weather/Fire/Earthquake % % PUEBLO(16KV) - Customers: 1, Equipment Failure 96% 97% - 3% 3% % 100% % 29% - Operation 4% 3% % 28% % 100% % 71% - Other % 97% % Vegetation/Animal % Weather/Fire/Earthquake % 72% RADIATOR(16KV) - Customers: Equipment Failure % 83% 100% % % Operation % 17% Other 100% 100% Vegetation/Animal % % REDGUM(16KV) - Customers: Equipment Failure Operation Other % Vegetation/Animal %

31 Reliability Histories for Individual Circuits Serving Torrance - 17 of 22 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI CircuitHistory17 SAIFI MAIFI SAIDI SAIFI MAIFI RIDGELAND(4.16KV) - Customers: rd Party % 69% Equipment Failure % 59% % 52% - Operation % 5% - 0% 1% - 100% 100% % 100% - 3% 12% - Other % 95% 100% 78% 31% 100% % 41% % 36% - Weather/Fire/Earthquake 100% 100% RIVET(4.16KV) - Customers: Equipment Failure % 100% - 58% 66% 100% % 100% % 52% - Operation % 34% % 100% % 48% - Other 100% 100% 100% ROSEMARY(4.16KV) - Customers: 1, rd Party % 66% 29% % 100% 100% 100% 100% 32% Equipment Failure 100% 100% % 33% 14% Operation % 100% - 0% 0% Other % % 2% 0% 57% % % Vegetation/Animal % SAGO(16KV) - Customers: 3, rd Party % 56% 24% Equipment Failure 15% 12% 51% 45% 42% 26% 98% 100% 100% 100% 100% - 100% 99% - 97% 100% 100% 2% 10% - 78% 66% 100% Operation 1% 1% - 4% 2% - 2% 0% % 1% - 3% 0% - 6% 1% - 2% 1% - Other % Vegetation/Animal 67% 58% % Weather/Fire/Earthquake 17% 29% % 90% - 20% 33% - 31

32 Reliability Histories for Individual Circuits Serving Torrance - 18 of 22 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI CircuitHistory18 SAIFI MAIFI SAIDI SAIFI MAIFI SELVA(16KV) - Customers: 1, rd Party % 9% 50% Equipment Failure 51% 42% 100% 81% 65% - 72% 43% 54% 84% 67% % 50% - 87% 53% - Operation 49% 58% - 3% 26% - 28% 57% - 16% 33% - 100% 100% % 50% - 13% 47% - Other % % SILICONE(16KV) - Customers: 2, Equipment Failure 37% 20% 38% 62% 46% - 57% 54% 57% % 93% 100% 99% 96% % 44% 100% Operation 63% 80% 24% 33% 49% - 3% 3% - 100% 100% - 4% 7% - 1% 4% % 6% - Other % 5% - 40% 43% 43% % 0% - 0% 0% - Vegetation/Animal % 1% 100% 0% 0% % 100% - 38% 50% - Weather/Fire/Earthquake % STATLER(16KV) - Customers: 1, rd Party 59% 84% 23% Equipment Failure 39% 12% - 2% 7% - 0% 1% % 100% % 6% - Operation 1% 4% - 1% 1% 91% 32% 36% - 100% 100% - 100% 100% % 100% - 87% 94% - Other % % 1% 24% Vegetation/Animal % 16% 48% % % % Weather/Fire/Earthquake % 44% 9% 67% 63% 18% STRAWBERRY(4.16KV) - Customers: Equipment Failure 100% 100% % 100% - 100% 100% % 100% - Operation % 100% Other % Vegetation/Animal %

33 Reliability Histories for Individual Circuits Serving Torrance - 19 of 22 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI CircuitHistory19 SAIFI MAIFI SAIDI SAIFI MAIFI STRINGER(4.16KV) - Customers: 1, rd Party % 25% % 42% 50% % 56% 42% 52% Equipment Failure 67% 67% - 74% 45% - 30% 50% 100% % 58% 50% % 58% 48% Operation 33% 33% 50% 26% 55% 50% 18% 25% Other % Vegetation/Animal % SUMP(4.16KV) - Customers: rd Party % % Equipment Failure % 87% 56% Operation % 44% % 100% % 100% - Other 100% 100% 67% TALENT(4.16KV) - Customers: Equipment Failure 100% 100% - 100% 100% - 100% 100% % 100% - 100% 100% - Operation Other % Vegetation/Animal % TEAK(16KV) - Customers: rd Party % 100% Equipment Failure Operation % 100% % 100% - Other % Vegetation/Animal %

34 Reliability Histories for Individual Circuits Serving Torrance - 20 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 CircuitHistory20 SAIFI MAIFI SAIDI SAIFI MAIFI TENOR(4.16KV) - Customers: 1, rd Party % % Equipment Failure 100% 100% - 100% 100% - 100% 100% % 46% - 32% 15% - Operation % 100% % 54% - 68% 85% - Other % Vegetation/Animal % TERRAZZO(4.16KV) - Customers: Equipment Failure 100% 100% 100% 33% 21% - 10% 1% - 100% 100% % 100% - Operation % 79% - 90% 99% Other TOURMALINE(4.16KV) - Customers: rd Party % Equipment Failure % 100% 100% % 100% - 100% 100% % 31% - Operation % 100% Other % % % Weather/Fire/Earthquake 100% 100% % 100% 100% % 69% 50% TRUSS(4.16KV) - Customers: 1, rd Party 100% 100% 50% % % Equipment Failure % 45% - 56% 64% 33% % 100% 100% % 100% 41% Operation % 55% - 44% 36% 33% Other % % % 34

35 Reliability Histories for Individual Circuits Serving Torrance - 21 of 22 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI CircuitHistory21 SAIFI MAIFI SAIDI SAIFI MAIFI VALMONTE(4.16KV) - Customers: rd Party % 50% 50% Equipment Failure % % 98% % % Operation 100% 100% % 2% - 100% 100% % 100% - Other Weather/Fire/Earthquake % 50% 50% VILLA(4.16KV) - Customers: 1, rd Party % % Equipment Failure 100% 100% - 100% 100% - 100% 100% % 100% - 100% 100% % 3% - Operation Other % % 100% 100% % 97% - Vegetation/Animal % VIOLET(4.16KV) - Customers: Equipment Failure 63% 46% - 14% 3% - 5% 0% Operation 37% 54% - 2% 3% - 95% 100% - 100% 100% 67% % 100% 67% Other Weather/Fire/Earthquake % 94% 100% % % WINLOCK(16KV) - Customers: 1, rd Party % 24% 61% Equipment Failure 97% 98% 100% 100% 100% - 16% 14% 39% % 100% % 100% 100% 100% 100% 100% Operation 3% 2% % 0% Other % 61%