Circuit Reliability Review

Transcription

1 Circuit Reliability Review Carson 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 DOMINGUEZ HILLS District CityList1 BELL BELL GARDENS BELLFLOWER CARSON COMMERCE COMPTON CUDAHY EAST COMPTON EAST LOS ANGELES FLORENCE-GRAHAM HUNTINGTON PARK LOS ANGELES LYNWOOD MAYWOOD PARAMOUNT SOUTH GATE VERNON WALNUT PARK WEST CARSON WEST COMPTON WILLOWBROOK 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 Carson CircuitList1 There are 58 circuits that serve Carson 1 Circuit Type Customers Circuit Type Customers Circuit Type Customers Circuit Type Customers ABRI(12KV) 1,083 KEYSTONE(4.16KV) 1, ANCHOR(4.16KV) 594 MANVILLE(12KV) BACH(12KV) 1,639 MARTIN(4.16KV) 1, BALLAST(16KV) 2,407 MCCLOUD(16KV) BANCROFT(16KV) 117 MIGUEL(12KV) BLIMP(16KV) 3,723 MILLPOINT(12KV) BOLTON(16KV) 2,674 PAN AMERICAN(12KV) BOND(12KV) 6 RAHN(16KV) BRINE(12KV) 911 REGAL(12KV) BURMA(16KV) 567 ROCHA(4.16KV) 1, CALM(12KV) 930 SHELL(12KV) CASWELL(16KV) 291 SHELLDOM(12KV) CATALYTIC(12KV) 125 SHOWCASE(16KV) CHRIS(12KV) 1,398 SPARTON(16KV) 1, COUNTY(12KV) 7 SQUALL(12KV) 1, DENVER(12KV) 309 STARBOARD(12KV) 1, DONNA(16KV) 532 STOCCO(12KV) DRIFT(12KV) 1,380 STORM(12KV) 3, EASY(4.16KV) 1,517 SUPERIOR(12KV) 1, EDGAR(12KV) 322 TAPER(4.16KV) 1, FIAT(4.16KV) 688 TORSON(16KV) FRY(12KV) 54 TWINING(16KV) GASBAG(16KV) 72 WEISER(12KV) GULF(4.16KV) 935 WILLOW(12KV) HANCOCK(12KV) 154 WILMINGTON(12KV) 1, HARBOR(4.16KV) 1,231 WISE(4.16KV) 1, HAYWARD(4.16KV) 943 ZAMORA(16KV) HELIUM(16KV) 148 ZEPPELIN(16KV) JENKINS(16KV) 1, KERNAN(16KV) Grand Total 47,891 7

8 Reliability History of Circuits Serving Carson (No Exclusions) BarChart SAIDI (average minutes of sustained interruptions) Carson SAIFI (average frequency of sustained interruptions) MAIFI (average frequency of momentary interruptions) SCE SYSTEMWIDE ** Exclusions are days which utilities are allowed to 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 8

9 Causes of Repair Outages in Carson 2017 SAIDIChart Weather /Fire /Earthquake 3.6% Vegetation /Animal 0.1% 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 14.1% Other 12.7% Equipment Failure 47.2% 3rd Party 22.3% 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 Carson 2017 SAIFIChart Weather /Fire /Earthquake 4.6% Contributions to SAIFI by Outage Cause Vegetation /Animal 0.3% 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 18.3% Other 13.3% 3rd Party 17.6% Equipment Failure 46.0% 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 Carson Updated through Dec 2017

14 Average Reliability of 58 Circuits Serving Carson 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 58 Circuits Serving Carson -- Total Customers: 47, rd Party 17% 10% 28% 22% 15% 26% 12% 18% 31% 3% 5% 7% 47% 37% 52% 16% 12% 11% 18% 22% 7% 22% 18% 17% Equipment Failure 58% 63% 15% 49% 47% 11% 57% 43% 14% 62% 45% 27% 16% 21% 2% 71% 79% 31% 62% 59% 17% 47% 46% 20% Operation 9% 6% 2% 22% 24% 9% 6% 7% 4% 7% 20% - 23% 31% 1% 13% 9% 5% 13% 9% 13% 14% 18% 5% Other 3% 7% 16% 5% 8% 21% 12% 18% 32% 21% 23% 49% 14% 11% 21% % 3% 4% 7% 13% 13% 27% Vegetation/Animal 5% 8% 26% 0% 0% 18% 0% 0% 3% - - 5% 0% 1% 24% % 0% 0% 54% 0% 0% 27% Weather/Fire/Earthquake 7% 6% 12% 3% 6% 15% 13% 14% 16% 7% 7% 13% % 5% 2% 4% 5% 4% 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 Carson - 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 ABRI(12KV) - Customers: 1, CircuitHistory rd Party % 34% 48% 100% Equipment Failure % 71% - 63% 50% % 100% 38% 100% 100% 38% Operation 100% 100% - 12% 29% - 3% 2% Other % Vegetation/Animal % % ANCHOR(4.16KV) - Customers: rd Party % % Equipment Failure 100% 100% 100% % 100% % 100% - Operation % Other % Vegetation/Animal BACH(12KV) - Customers: 1, rd Party % % Equipment Failure 100% 100% 26% 100% 100% - 68% 52% 39% 100% 100% - 100% 100% % 100% - Operation % 2% 20% Other % % 47% 20% % % % Vegetation/Animal % % Weather/Fire/Earthquake % % BALLAST(16KV) - Customers: 2, rd Party % % 0% 100% % 0% 50% Equipment Failure 99% 96% - 22% 76% - 20% 20% % 4% % 100% - 44% 23% - Operation 0% 3% - 78% 24% - 80% 80% % 96% % 77% - Other % % % Vegetation/Animal 1% 1% 100% %

16 Reliability Histories for Individual Circuits Serving Carson - 2 of 15 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 BANCROFT(16KV) - Customers: Equipment Failure 100% 100% - 100% 100% - 100% 100% 56% % 100% % 100% - Operation % Vegetation/Animal % % BLIMP(16KV) - Customers: 3, rd Party % % 6% % 1% - Equipment Failure 51% 59% - 65% 52% 23% 27% 16% - 67% 8% - 3% 0% - 93% 66% 100% 94% 96% - 84% 46% 49% Operation % 46% - 7% 3% - 33% 92% - 81% 94% - 7% 34% % 51% - Other % 2% - 25% 6% 21% % % Vegetation/Animal 6% 0% 50% % Weather/Fire/Earthquake 43% 40% 50% % 42% 75% 58% % 4% - 3% 2% - BOLTON(16KV) - Customers: 2, rd Party 25% 37% 53% % % 86% 100% % 27% 55% Equipment Failure 14% 5% - 0% 0% - 4% 0% 28% 77% 69% - 3% 1% - 56% 93% 100% % 49% 29% Operation 58% 57% 18% 81% 73% 28% 2% 4% 29% 1% 1% - 20% 13% - 44% 7% - 100% 100% - 12% 5% - Other % 27% 72% 94% 96% 16% Vegetation/Animal % Weather/Fire/Earthquake 2% 2% % 31% 100% % 18% 16% BOND(12KV) - Customers: Equipment Failure 100% 100% Operation Vegetation/Animal

17 Reliability Histories for Individual Circuits Serving Carson - 3 of 15 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 BRINE(12KV) - Customers: rd Party 86% 20% 60% 22% 8% % Equipment Failure 14% 79% - 78% 91% % 99% 100% % % 95% 53% Operation 0% 1% - 1% 1% - 100% 100% % 1% - 100% 100% % 5% - Other % Vegetation/Animal % % BURMA(16KV) - Customers: rd Party 33% 9% 17% 84% 98% Equipment Failure 66% 91% 11% 16% 2% % % 100% 100% 88% 65% 49% Operation % % 100% % 35% - Other % % % Vegetation/Animal % Weather/Fire/Earthquake 1% 0% 18% CALM(12KV) - Customers: rd Party 76% 89% 100% 100% 100% % Equipment Failure 24% 11% Operation % 100% Other % 0% % Vegetation/Animal % % CASWELL(16KV) - Customers: rd Party % 100% 28% % 50% 22% Equipment Failure % 100% 11% % 100% % 0% - Operation 100% 100% - 100% 100% 63% Other % 100% 100% 100% % 50% 22% Vegetation/Animal % % % % Weather/Fire/Earthquake %

18 Reliability Histories for Individual Circuits Serving Carson - 4 of 15 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 CATALYTIC(12KV) - Customers: Equipment Failure Operation Vegetation/Animal 100% 100% 100% CHRIS(12KV) - Customers: 1, rd Party % 70% 71% % 100% - 100% 100% 100% % 68% 81% Equipment Failure 100% 100% 100% 59% 23% - 96% 99% 100% % 46% - 7% 15% - Operation 0% 0% - 6% 7% - 4% 1% Other % % 54% 100% 28% 17% 19% Vegetation/Animal COUNTY(12KV) - Customers: Equipment Failure Operation Vegetation/Animal DENVER(12KV) - Customers: Equipment Failure % % 100% Operation Other % Vegetation/Animal % % 100% 100% % % 100% 100% 18

19 Reliability Histories for Individual Circuits Serving Carson - 5 of 15 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 DONNA(16KV) - Customers: Equipment Failure 100% 100% - 85% 60% - 100% 100% Operation % 40% Vegetation/Animal % % % DRIFT(12KV) - Customers: 1, rd Party % Equipment Failure % 100% 100% % 100% % 100% 29% 100% 100% 29% Operation Vegetation/Animal % % EASY(4.16KV) - Customers: 1, rd Party % % % Equipment Failure 100% 100% - 86% 99% 34% 98% 97% - 60% 50% % 41% - Operation % 1% % 0% % 100% 100% 48% 18% 28% Other % % % 50% % % 41% 18% Vegetation/Animal % % % Weather/Fire/Earthquake % 3% 100% % % EDGAR(12KV) - Customers: Equipment Failure 36% 50% % 100% - 100% 100% - Operation Vegetation/Animal 64% 50% 100%

20 Reliability Histories for Individual Circuits Serving Carson - 6 of 15 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 FIAT(4.16KV) - Customers: rd Party % % % Equipment Failure % 100% - 100% 100% % 50% % 40% - Operation % 100% % 50% % 60% - Other % % % Vegetation/Animal FRY(12KV) - Customers: Equipment Failure 100% 100% % 100% 100% % 100% 100% Operation Vegetation/Animal GASBAG(16KV) - Customers: rd Party % Equipment Failure 100% 100% % 90% Operation % 10% Other % % Vegetation/Animal % GULF(4.16KV) - Customers: rd Party % 96% 100% 21% 10% - 100% 100% % 100% - Equipment Failure 100% 100% % 90% Operation % 4% Other % % % % Vegetation/Animal

21 Reliability Histories for Individual Circuits Serving Carson - 7 of 15 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 HANCOCK(12KV) - Customers: rd Party % 50% 100% Equipment Failure 32% 24% % 50% Operation 8% 1% Other 38% 49% Vegetation/Animal 22% 25% 100% HARBOR(4.16KV) - Customers: 1, rd Party % 73% 100% % Equipment Failure % 36% 27% - 11% 2% Operation 100% 100% Other % 98% 71% Vegetation/Animal HAYWARD(4.16KV) - Customers: rd Party 80% 95% 100% % 15% 100% Equipment Failure 18% 3% - 82% 6% 24% 56% 43% % 100% - 100% 100% - 100% 100% - Operation 2% 2% - 6% 4% 25% 12% 42% Other % % Vegetation/Animal % % Weather/Fire/Earthquake % 91% 50% HELIUM(16KV) - Customers: rd Party % Equipment Failure 53% 59% 100% 100% 100% - 100% 100% 20% Operation % 100% % 100% - Other 47% 41% % % Vegetation/Animal % %

22 Reliability Histories for Individual Circuits Serving Carson - 8 of 15 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 JENKINS(16KV) - Customers: 1, rd Party % 65% 100% % Equipment Failure 94% 99% 34% % 100% % 100% - 100% 100% - 37% 50% - Operation 5% 1% 1% % 1% % % 0% 1% 67% Other % 35% % 100% 99% % 50% - Vegetation/Animal 0% 0% 65% % % KERNAN(16KV) - Customers: rd Party 0% 0% - 98% 100% 50% 77% 66% % 100% % 0% - Equipment Failure 94% 98% % 33% 66% 3% 0% % 100% % 1% - Operation 4% 1% - 2% 0% 50% 1% 1% - 0% 0% % 0% - Other 1% 1% 50% % Vegetation/Animal % Weather/Fire/Earthquake % 100% % 100% 100% 88% 99% 100% KEYSTONE(4.16KV) - Customers: 1, rd Party 32% 10% 48% 97% 99% 100% % % % Equipment Failure % 0% - 100% 100% 33% % % Operation % 1% % 100% - 100% 100% - Other % % % % % % Vegetation/Animal Weather/Fire/Earthquake 68% 90% 17% MANVILLE(12KV) - Customers: Equipment Failure 98% 51% Operation Other 2% 49% % % Vegetation/Animal % % % % 22

23 Reliability Histories for Individual Circuits Serving Carson - 9 of 15 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 MARTIN(4.16KV) - Customers: 1, rd Party % % % 100% 24% 100% 100% - 51% 35% 24% Equipment Failure 65% 33% 100% 94% 61% - 97% 20% - 69% 50% % 33% - Operation 35% 67% % 80% Other % 39% 50% % 31% 50% % % 33% 51% Vegetation/Animal % % % Weather/Fire/Earthquake % MCCLOUD(16KV) - Customers: Equipment Failure 95% 99% 78% 100% 100% - 99% 100% - 100% 100% % 100% 100% 100% 100% 100% 100% 100% 100% Operation 5% 1% % Other % 0% Vegetation/Animal % % MIGUEL(12KV) - Customers: Equipment Failure Operation 38% 21% - 100% 100% Vegetation/Animal 62% 79% 100% MILLPOINT(12KV) - Customers: rd Party % 100% % 100% - Equipment Failure 45% 43% 34% Operation 13% 14% 27% 100% 100% 100% 100% 100% % 0% % 0% - Vegetation/Animal 41% 43% 39%

24 Reliability Histories for Individual Circuits Serving Carson - 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 PAN AMERICAN(12KV) - Customers: Equipment Failure Operation Other % Vegetation/Animal % % % % RAHN(16KV) - Customers: rd Party % % Equipment Failure % 100% 100% % 62% 42% Operation 100% 100% - 96% 99% - 100% 100% Other % % % Vegetation/Animal % 4% 1% 33% % 100% 100% 2% 38% 16% REGAL(12KV) - Customers: rd Party % 1% Equipment Failure % 22% - 12% 8% Operation 100% 100% - 48% 78% Other % Vegetation/Animal % % % % Weather/Fire/Earthquake % 91% ROCHA(4.16KV) - Customers: 1, rd Party % 2% 100% 41% 57% 15% Equipment Failure % 3% 1% Operation % 8% - 47% 14% Other % 57% 88% - 12% 29% 85% % 100% 100% % 100% 100% Vegetation/Animal

25 Reliability Histories for Individual Circuits Serving Carson - 11 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 CircuitHistory11 SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SHELL(12KV) - Customers: Equipment Failure 65% 50% % 100% % 2% - 20% 2% - Operation % 98% 100% 80% 98% 100% Other 35% 50% Vegetation/Animal SHELLDOM(12KV) - Customers: Equipment Failure 70% 50% 50% 100% 100% - 32% 76% Operation % 24% Vegetation/Animal 30% 50% 50% SHOWCASE(16KV) - Customers: rd Party % 100% - 99% 100% - Equipment Failure % 99% 100% % 100% % 0% - Operation % 100% 100% 0% 1% Vegetation/Animal % SPARTON(16KV) - Customers: 1, Equipment Failure 100% 100% - 96% 99% 100% 63% 85% 29% % 71% % 19% - Operation % 1% - 32% 14% - 100% 100% - 100% 100% - 4% 29% % 81% - Other % 1% 71% Vegetation/Animal % % % 25

26 Reliability Histories for Individual Circuits Serving Carson - 12 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 CircuitHistory12 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SQUALL(12KV) - Customers: 1, rd Party 100% 100% % Equipment Failure % 87% - 0% 1% Operation % 13% - 31% 58% - 100% 100% - 100% 100% - 100% 100% % 100% - Other % Vegetation/Animal % 42% 33% % % STARBOARD(12KV) - Customers: 1, rd Party % 9% 33% % 100% % 100% - Equipment Failure % 26% - 61% 5% Operation % 74% Other % 85% 67% % % Vegetation/Animal % % STOCCO(12KV) - Customers: Equipment Failure 10% 5% Operation Other 31% 6% Vegetation/Animal 59% 89% 100% STORM(12KV) - Customers: 3, rd Party % 1% 44% 27% 34% 47% Equipment Failure 92% 97% 100% 67% 43% 11% 26% 40% 41% 100% 100% % 8% - Operation 8% 3% - 32% 57% - 3% 1% % 100% % 100% - 92% 92% - Other % 0% Vegetation/Animal % % Weather/Fire/Earthquake % 0% 44% 44% 25% 12%

27 Reliability Histories for Individual Circuits Serving Carson - 13 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 CircuitHistory13 SAIFI MAIFI SAIDI SAIFI MAIFI SUPERIOR(12KV) - Customers: 1, rd Party % % 48% 50% % 100% 100% 100% 100% 50% Equipment Failure 100% 100% - 99% 100% - 29% 5% Operation % 0% - 0% 0% Other % 0% - 36% 47% 50% Vegetation/Animal % % TAPER(4.16KV) - Customers: 1, rd Party % % % % 100% % 27% - Equipment Failure 74% 41% % 93% - 82% 50% 100% % 85% - 19% 42% 65% Operation 26% 59% % % 50% % 100% - 40% 13% - 7% 31% - Other % 8% 2% - 0% 0% 17% Vegetation/Animal % % Weather/Fire/Earthquake % 100% 50% 14% 7% 38% TORSON(16KV) - Customers: Equipment Failure 90% 92% 1% 100% 100% % 100% 100% % % 100% 65% Operation 10% 8% - 0% 0% Vegetation/Animal % % % TWINING(16KV) - Customers: rd Party 90% 50% Equipment Failure 10% 50% 47% 100% 100% 9% 94% 90% 100% Operation % 6% 10% - 100% 100% % % 4% 100% Vegetation/Animal % Weather/Fire/Earthquake % 100% - 85% 96% - 27

28 Reliability Histories for Individual Circuits Serving Carson - 14 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 CircuitHistory14 SAIFI MAIFI SAIDI SAIFI MAIFI WEISER(12KV) - Customers: Equipment Failure Operation 28% 46% Vegetation/Animal 72% 54% 100% WILLOW(12KV) - Customers: rd Party % 51% - 95% 73% % 73% - Equipment Failure % 43% 100% 32% 49% Operation % 57% % 27% % 27% - Vegetation/Animal WILMINGTON(12KV) - Customers: 1, Equipment Failure % 25% - 86% 94% 25% 77% 98% 100% % 98% 100% Operation % 6% - 23% 2% % 2% - Other % Vegetation/Animal 100% 100% 100% 36% 75% % WISE(4.16KV) - Customers: 1, rd Party % 0% 0% 38% Equipment Failure % 99% 4% 100% 99% 28% 55% 49% % 49% - Operation 18% 5% - 1% 1% - 0% 1% - 8% 2% % 2% - Other 82% 95% % % 49% % 49% - Vegetation/Animal % % % Weather/Fire/Earthquake %

29 Reliability Histories for Individual Circuits Serving Carson - 15 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 CircuitHistory15 SAIFI MAIFI SAIDI SAIFI MAIFI ZAMORA(16KV) - Customers: Equipment Failure 100% 100% % 47% % 100% % 100% - Operation 0% 0% % Other % 53% Vegetation/Animal % % Weather/Fire/Earthquake % ZEPPELIN(16KV) - Customers: rd Party 100% 100% % Equipment Failure % 100% 24% Operation Other % % Vegetation/Animal %