Circuit Reliability Review

Transcription

1 Circuit Reliability Review Santa Clarita 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 VALENCIA District CityList1 ACTON AGUA DULCE BOUQUET CANYON CANYON COUNTRY CASTAIC ESCONDIDO CANYON FILLMORE FOREST PARK FRIENDLY VALLEY HASKELL CANYON HASLEY CANYON HONBY KAGEL CANYON LAKE OF THE WOODS LITTLE TUJUNGA LOPEZ CANYON MINT CANYON NEWHALL NORTH FORK SADDLE NORTH OAKS PACOIMA CANYON PICO CANYON PINE MOUNTAIN CLUB PINON PINES PIRU PLACERITA CANYON SAN FERNANDO SAN FRANCISQUITO CANYON SAND CANYON SANTA CLARITA SAUGUS SLEEPY VALLEY SOLEDAD CANYON SOLEMINT TICK CANYON UNIVERSAL CITY VAL VERDE PARK VALENCIA VASQUEZ CANYON WARM SPRINGS CANYON 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 Santa Clarita CircuitList1 There are 55 circuits that serve Santa Clarita 1 Circuit Type Customers Circuit Type Customers Circuit Type Customers Circuit Type Customers ANACONDA(16KV) 1,693 MAXIMUS(16KV) 2, ARLENE(16KV) 1,563 MCBEAN(16KV) 2, BERMITE(16KV) 664 MENTRY(16KV) 2, BLACKBIRD(16KV) 1,466 MINT CANYON(16KV) 1, BOA(16KV) 1,697 MOCCASIN(16KV) 1, BOUQUET(16KV) 740 MORRIE(16KV) BUCKHORN(16KV) 2,443 NEARGATE(16KV) 1, CAESAR(16KV) 1,970 NERO(16KV) 2, CALGROVE(16KV) 1,894 NIGHTHAWK(16KV) CENTURION(16KV) 2,149 ORION(16KV) 3, CHARIOT(16KV) 2,620 PLACERITA(16KV) 1, COBRA(16KV) 1,745 POWELL(16KV) 2, CONSTANTINE(16KV) 2,092 PYTHON(16KV) 1, COPPERHEAD(16KV) 800 RACER(16KV) COTTONMOUTH(16KV) 3,400 RATTLER(16KV) 3, CRABTREE(16KV) 1,530 RINER(16KV) 1, CROSS(16KV) 1,331 ROMANUS(16KV) 2, DEWITT(16KV) 1,185 SAND CANYON(16KV) 2, DIAMONDBACK(16KV) 2,139 STARFIGHTER(16KV) 3, DRY CANYON(16KV) 1,710 TIPS(16KV) ELECTRA(16KV) 282 TOGA(16KV) 2, GAVIN(16KV) 1,204 VAL VERDE(16KV) GUITAR(16KV) 243 VASQUEZ(16KV) 2, HILLFIELD(16KV) 2,059 WILDWOOD(16KV) 2, JBSHERMAN(16KV) 2,718 WILEY(16KV) 2, JULIUS(16KV) 3, LYONS(16KV) 3, MAGIC(16KV) MAMBA(16KV) 2, MARCUS(16KV) 1, Grand Total 97,590 7

8 Reliability History of Circuits Serving Santa Clarita (No Exclusions) BarChart SAIDI (average minutes of sustained interruptions) Santa Clarita 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 Santa Clarita 2017 SAIDIChart 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 Vegetation /Animal 1.4% Other 16.9% Operation 10.3% Weather /Fire /Earthquake 12.0% 3rd Party 7.4% Equipment Failure 52.1% 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 Santa Clarita 2017 SAIFIChart Contributions to SAIFI by Outage Cause Vegetation /Animal 5.2% 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 Other 15.2% Weather /Fire /Earthquake 10.2% Operation 15.8% 3rd Party 10.8% Equipment Failure 42.8% 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 Santa Clarita Updated through Dec 2017

14 Average Reliability of 55 Circuits Serving Santa Clarita 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 55 Circuits Serving Santa Clarita -- Total Customers: 97, rd Party 1% 1% 13% 9% 8% 12% 11% 9% 3% 5% 11% 1% 15% 18% 41% 9% 8% 4% 5% 9% 19% 7% 11% 16% Equipment Failure 72% 67% 22% 58% 60% 34% 51% 43% 7% 69% 36% 18% 75% 63% 29% 78% 75% 31% 36% 28% 25% 52% 43% 25% Operation 4% 7% 5% 8% 6% 7% 10% 16% 6% 14% 7% - 7% 10% - 8% 15% 2% 11% 20% 0% 10% 16% 1% Other 0% 0% 18% 5% 6% 16% 9% 13% 15% 0% 0% 46% 1% 0% 21% 5% 3% 12% 27% 27% 33% 17% 15% 29% Vegetation/Animal 4% 5% 36% 1% 5% 13% 7% 14% 67% 1% 13% 1% 2% 7% 9% % 2% 4% 23% 1% 5% 12% Weather/Fire/Earthquake 19% 20% 6% 19% 15% 17% 13% 5% 3% 11% 33% 34% 1% 2% - 0% 0% 38% 19% 11% - 12% 10% 17% 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 Santa Clarita - 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 ANACONDA(16KV) - Customers: 1, CircuitHistory rd Party Equipment Failure 100% 100% 100% 100% 100% - 100% 100% % 71% % 22% - Operation % 100% - 14% 29% % % 55% 100% Other % 100% % 23% - Vegetation/Animal % ARLENE(16KV) - Customers: 1, Equipment Failure 17% 12% 41% 100% 100% 100% 25% 7% % 72% - 100% 100% - 69% 76% - Operation 82% 87% 59% % 93% Other % 25% % 21% - Vegetation/Animal 1% 1% % Weather/Fire/Earthquake % 3% 100% % 3% 100% BERMITE(16KV) - Customers: rd Party % 25% % 1% - Equipment Failure 100% 100% - 73% 42% 50% % 100% % 98% - Operation Other % 58% - 93% 79% Vegetation/Animal % 7% 21% 100% % 75% 100% % 2% 100% BLACKBIRD(16KV) - Customers: 1, Equipment Failure % 22% 50% 52% 22% 50% Operation % 100% - 100% 100% - 100% 100% - 100% 100% % 28% - 16% 29% - Other % 50% 9% 31% 50% 9% Vegetation/Animal % % % 15

16 Reliability Histories for Individual Circuits Serving Santa Clarita - 2 of 14 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 BOA(16KV) - Customers: 1, rd Party 96% 43% % 100% 100% 100% 100% 0% Equipment Failure % 100% - 100% 100% Operation 4% 57% Vegetation/Animal % % % BOUQUET(16KV) - Customers: rd Party % 52% % % Equipment Failure 27% 8% 1% 7% 1% 71% 10% 24% 11% % 50% % 0% - Operation % 97% 20% % 50% - 100% 100% % 11% - Other 5% 4% % 22% 24% 11% Vegetation/Animal 0% 0% 66% % Weather/Fire/Earthquake 68% 89% 33% 8% 2% % 100% - 85% 89% - BUCKHORN(16KV) - Customers: 2, rd Party 2% 2% - 1% 0% 51% Equipment Failure 98% 97% - 8% 2% - 29% 46% % 97% - 47% 12% % 83% - Operation 0% 1% - 1% 1% - 2% 4% % 86% % 14% - Other % 0% 0% 2% % % % 5% 1% 7% - - 7% 0% 0% 38% Vegetation/Animal % 3% % % % Weather/Fire/Earthquake - - 3% 90% 97% 47% 65% 46% % 3% % 3% - CAESAR(16KV) - Customers: 1, rd Party 1% 2% 63% 100% 100% 100% % 100% - 100% 100% - Equipment Failure 99% 98% 37% % 97% 100% Operation % 1% Other % 2% Vegetation/Animal

17 Reliability Histories for Individual Circuits Serving Santa Clarita - 3 of 14 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 CALGROVE(16KV) - Customers: 1, rd Party % 3% % % Equipment Failure 6% 1% - 55% 10% 0% 81% 98% 1% 100% 100% - 100% 100% 50% % 100% 1% Operation 7% 30% 4% 18% 30% 31% Other - - 1% 22% 58% 69% 19% 2% % % Vegetation/Animal % % Weather/Fire/Earthquake 87% 69% CENTURION(16KV) - Customers: 2, Equipment Failure 99% 96% 100% 94% 93% 100% 73% 6% 100% % 100% 100% % 100% 100% Operation 1% 4% - 6% 7% - 27% 94% Vegetation/Animal CHARIOT(16KV) - Customers: 2, rd Party % 92% Equipment Failure 100% 100% 100% % 93% % 90% 87% 100% Operation % 8% 5% 9% 11% 6% 100% 100% % 7% % 13% - Vegetation/Animal Weather/Fire/Earthquake % 91% 89% 94% COBRA(16KV) - Customers: 1, Equipment Failure % 2% % 2% - Operation 100% 100% - 100% 100% % 98% % 98% - Other % 100% 44% Vegetation/Animal % Weather/Fire/Earthquake % % 17

18 Reliability Histories for Individual Circuits Serving Santa Clarita - 4 of 14 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 CONSTANTINE(16KV) - Customers: 2, Equipment Failure 97% 78% % 57% % 100% % 98% 100% 90% 94% 87% Operation 3% 22% - 100% 100% - 31% 43% % 100% 100% 3% 2% - 10% 6% 13% Vegetation/Animal COPPERHEAD(16KV) - Customers: rd Party 1% 2% 45% % 100% - 100% 100% - Equipment Failure 90% 66% 55% % 74% Operation 1% 9% Other % 26% 37% Vegetation/Animal % Weather/Fire/Earthquake 8% 23% COTTONMOUTH(16KV) - Customers: 3, Equipment Failure 99% 99% - 37% 39% - 95% 93% 33% % 45% - 81% 88% - 100% 100% - 80% 87% - Operation 1% 1% - 63% 61% - 4% 5% % 55% - 19% 12% % 13% - Other % 2% Vegetation/Animal % CRABTREE(16KV) - Customers: 1, rd Party % % 63% Equipment Failure 100% 100% % 0% 50% % 31% 100% 44% 22% 100% Operation % 100% - 4% 2% % 35% - 17% 25% - Other % % 32% Vegetation/Animal % 0% 3% 50% % 100% % 28% - Weather/Fire/Earthquake % 35% - 36% 25% - 18

19 Reliability Histories for Individual Circuits Serving Santa Clarita - 5 of 14 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 CROSS(16KV) - Customers: 1, Equipment Failure 100% 100% 3% 99% 86% - 100% 100% % 28% - 79% 28% - Operation % 14% % 72% 100% 21% 72% 100% Vegetation/Animal % % DEWITT(16KV) - Customers: 1, Equipment Failure 99% 92% - 99% 96% 100% 98% 95% - 87% 63% 100% 100% 100% 100% 99% 81% % 76% 100% Operation 1% 8% - 1% 4% - 2% 5% - 13% 37% % 19% % 24% - Vegetation/Animal % % DIAMONDBACK(16KV) - Customers: 2, Equipment Failure % 56% - 100% 100% % 63% - Operation 100% 100% % 100% % 44% % 100% - 35% 37% - Vegetation/Animal % DRY CANYON(16KV) - Customers: 1, Equipment Failure 100% 100% 100% 100% 100% - 15% 4% % 100% % 100% - 100% 100% - Operation Other % 47% Vegetation/Animal % 6% 49% 100%

20 Reliability Histories for Individual Circuits Serving Santa Clarita - 6 of 14 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 ELECTRA(16KV) - Customers: Equipment Failure 62% 50% 49% Operation % % Other 38% 50% 51% % % Vegetation/Animal % % 14% 100% 1% 14% 30% Weather/Fire/Earthquake % 86% - 99% 86% - GAVIN(16KV) - Customers: 1, Equipment Failure % 57% Operation % 100% - 30% 43% % 100% % 100% - Vegetation/Animal % % GUITAR(16KV) - Customers: rd Party 23% 27% 6% - - 4% % 100% % 4% - Equipment Failure 31% 11% 42% 11% 2% - 15% 6% % % 100% - 7% 1% - 12% 39% 8% Operation 0% 1% - 2% 1% - 57% 35% Other % 13% 11% 96% % % % Vegetation/Animal 44% 60% % 4% 33% % % % Weather/Fire/Earthquake 1% 0% - 74% 86% - 6% 54% % 99% - 87% 57% - HILLFIELD(16KV) - Customers: 2, Equipment Failure % 100% 4% 30% 24% Operation 100% 100% - 0% 0% 96% 70% 76% % 92% % 2% - Other % % 48% 8% % 0% 34% Vegetation/Animal % Weather/Fire/Earthquake % 100% 100% - 97% 98% 66% 20

21 Reliability Histories for Individual Circuits Serving Santa Clarita - 7 of 14 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 JBSHERMAN(16KV) - Customers: 2, rd Party % % Equipment Failure 97% 91% 100% 63% 51% 67% 94% 57% 23% % 97% 23% % 97% 23% Operation 3% 9% % 1% % 3% % 3% - Other % 49% 33% Vegetation/Animal % 43% 77% JULIUS(16KV) - Customers: 3, rd Party % Equipment Failure % 100% - 10% 3% Operation 100% 100% % 97% % 100% % 16% - 4% 16% - Other % 84% - 96% 84% - Vegetation/Animal LYONS(16KV) - Customers: 3, rd Party % % % 75% 100% % 6% 100% 6% 23% 73% Equipment Failure 100% 100% - 14% 11% - 49% 5% % 25% - 100% 100% - 98% 94% - 93% 56% - Operation % 87% - 51% 95% 50% Vegetation/Animal % % Weather/Fire/Earthquake % 2% 50% % 100% 100% % 20% 27% MAGIC(16KV) - Customers: Equipment Failure % 51% 33% 100% 100% 100% % 100% 100% Operation Other % 100% % Vegetation/Animal % 49% 34%

22 Reliability Histories for Individual Circuits Serving Santa Clarita - 8 of 14 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 MAMBA(16KV) - Customers: 2, rd Party % 95% - 1% 1% % 96% 100% 94% 92% 33% Equipment Failure 92% 96% - 10% 5% - 77% 74% 31% % 22% % 1% - Operation 0% 0% 98% % 78% % 4% - 1% 7% - Other % 15% 24% 15% % % % Vegetation/Animal % Weather/Fire/Earthquake 8% 4% 2% % 1% MARCUS(16KV) - Customers: 1, Equipment Failure 98% 96% - 96% 96% 25% 100% 100% % 82% - 100% 100% % 70% - Operation 1% 3% 2% Other % 4% 4% % 100% - 17% 15% - Vegetation/Animal 1% 1% % % 18% % 15% - MAXIMUS(16KV) - Customers: 2, Equipment Failure % 30% % % Operation % 70% % 100% - 100% 100% % 100% - Vegetation/Animal MCBEAN(16KV) - Customers: 2, Equipment Failure 78% 71% 51% 13% 8% - 1% 4% - 100% 100% - 100% 100% % 100% - Operation Vegetation/Animal 22% 29% 49% % Weather/Fire/Earthquake % 92% - 99% 96% 47%

23 Reliability Histories for Individual Circuits Serving Santa Clarita - 9 of 14 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 MENTRY(16KV) - Customers: 2, rd Party % 88% - 12% 2% - Equipment Failure % 87% - 96% 98% % 100% % 12% - 84% 97% - Operation 100% 100% - 4% 13% - 4% 2% - 100% 100% - 2% 0% % 1% - Vegetation/Animal % % MINT CANYON(16KV) - Customers: 1, Equipment Failure 98% 95% % 12% Operation 2% 5% % 12% Other % 100% % 100% - Vegetation/Animal % 77% 100% Weather/Fire/Earthquake % MOCCASIN(16KV) - Customers: 1, rd Party % 93% Equipment Failure % 2% - 100% 100% % 100% % 0% - Operation 100% 100% - 9% 5% Other % 100% 100% 100% 100% 100% Vegetation/Animal % MORRIE(16KV) - Customers: Equipment Failure % 100% 59% 79% 40% 17% % 100% % 96% - Operation % 0% 28% 100% 100% % 4% - Other % 37% 28% Vegetation/Animal % 2% 22% 28%

24 Reliability Histories for Individual Circuits Serving Santa Clarita - 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 NEARGATE(16KV) - Customers: 1, rd Party % 38% % 99% 100% % 37% 6% Equipment Failure 0% 0% - 42% 54% 16% 72% 60% 18% 100% 100% 50% 100% 100% - 1% 1% - 0% 0% 100% 5% 9% 35% Operation 2% 3% - 10% 2% - 2% 1% % 12% - 5% 6% - Other % % % 88% - 62% 48% 59% Vegetation/Animal % 49% 44% 84% % Weather/Fire/Earthquake 98% 97% 10% NERO(16KV) - Customers: 2, Equipment Failure 71% 73% 26% 95% 98% 75% 83% 28% % 2% % 2% - Operation 1% 4% - 0% 0% - 15% 71% % 98% % 93% - Other % 2% - 2% 1% Vegetation/Animal Weather/Fire/Earthquake 28% 24% 74% 3% 1% 25% % 100% - 58% 5% - NIGHTHAWK(16KV) - Customers: Equipment Failure 99% 100% % 74% 53% Operation 1% 0% % 4% 14% Other % 100% 100% 100% 15% 22% 16% % % Vegetation/Animal % % 14% 100% 1% 14% 22% Weather/Fire/Earthquake % 86% - 99% 86% - ORION(16KV) - Customers: 3, rd Party % 16% Equipment Failure 10% 3% 0% 54% 69% 50% Operation 90% 98% - 46% 31% - 10% 8% - 100% 100% % 100% - 100% 100% - Other % % 73% 76% % % % Vegetation/Animal % % % 24

25 Reliability Histories for Individual Circuits Serving Santa Clarita - 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 PLACERITA(16KV) - Customers: 1, rd Party % 9% 50% % 100% % 100% - Equipment Failure 100% 100% - 100% 100% Operation % 4% - 100% 100% % 0% - Other % 43% Vegetation/Animal % 3% 43% 50% POWELL(16KV) - Customers: 2, Equipment Failure 100% 100% - 99% 99% 100% 59% 74% % 94% 100% 100% 100% 100% 1% 4% - 41% 42% 70% Operation % 18% % 96% - 29% 9% - Other % 7% % 6% 6% % 3% 20% Vegetation/Animal % 1% 1% % Weather/Fire/Earthquake % 1% - 100% 100% 33% % 46% 10% PYTHON(16KV) - Customers: 1, rd Party % 49% 20% 54% 58% 30% % 24% 12% Equipment Failure 81% 86% - 75% 90% - 25% 17% 14% 46% 42% 70% % 100% - 26% 55% 100% 30% 46% 58% Operation 6% 2% - 16% 4% 27% 19% 8% 9% % 5% % 1% - 2% 1% - Other % 4% 3% 26% % % 45% - 49% 23% - Vegetation/Animal 14% 13% 45% 2% 3% 19% 19% 26% 28% % % Weather/Fire/Earthquake % 0% 27% % 95% % 6% - RACER(16KV) - Customers: rd Party % 61% - 18% 79% 43% Equipment Failure 100% 100% 100% 75% 39% Operation % 21% Other % Vegetation/Animal %

26 Reliability Histories for Individual Circuits Serving Santa Clarita - 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 RATTLER(16KV) - Customers: 3, Equipment Failure 100% 100% % 95% % 100% % 100% - Operation % 5% Other % Vegetation/Animal % Weather/Fire/Earthquake % % RINER(16KV) - Customers: 1, Equipment Failure % 46% % 96% 100% % 90% 100% Operation 100% 100% 100% 100% 100% - 9% 7% - 100% 100% % 4% % 10% - Vegetation/Animal % 46% 100% ROMANUS(16KV) - Customers: 2, Equipment Failure 100% 100% % 71% - 97% 50% 86% 88% 97% 100% % 66% 87% Operation % 4% - 26% 29% 100% % 3% % 1% - Vegetation/Animal % 50% 14% % 33% 13% Weather/Fire/Earthquake % 96% 100% SAND CANYON(16KV) - Customers: 2, Equipment Failure 95% 97% 4% 93% 96% 100% 29% 65% - 100% 100% % 2% - 48% 19% - Operation 5% 3% - 0% 0% - 2% 0% 1% % 48% % 68% - 20% 51% - Other % 6% 4% % % 39% % 9% - Vegetation/Animal % 1% 57% % 12% % 3% - Weather/Fire/Earthquake % 0% - 68% 33% % % 31% - 25% 18% 100% 26

27 Reliability Histories for Individual Circuits Serving Santa Clarita - 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 STARFIGHTER(16KV) - Customers: 3, Equipment Failure % 100% - 100% 100% - 100% 100% - 29% 21% 16% 36% 25% 16% Operation 100% 100% % 4% % 37% - 43% 35% - Other % 21% 68% 5% 20% 68% Vegetation/Animal % 96% 100% % 21% 16% 16% 20% 16% TIPS(16KV) - Customers: Equipment Failure % 51% Operation Vegetation/Animal % 49% 100% TOGA(16KV) - Customers: 2, rd Party % 16% 71% Equipment Failure 100% 100% - 17% 44% 1% 39% 62% 50% % 76% % 74% - Operation % 5% - 61% 38% 50% % 24% % 23% - Other % 100% % 3% - Vegetation/Animal Weather/Fire/Earthquake % 36% 29% VAL VERDE(16KV) - Customers: Equipment Failure % 100% 100% 100% 100% 100% Operation % 1% Vegetation/Animal % 99% 100%

28 Reliability Histories for Individual Circuits Serving Santa Clarita - 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 VASQUEZ(16KV) - Customers: 2, Equipment Failure 63% 28% - 91% 91% % 30% - 100% 100% - 35% 40% - Operation 12% 51% 100% 9% 9% - 100% 100% % 25% % 22% - Other % 44% % 38% - Vegetation/Animal % Weather/Fire/Earthquake 25% 21% WILDWOOD(16KV) - Customers: 2, Equipment Failure % 61% % 24% % 22% - Operation 100% 100% - 29% 39% 100% 100% 100% - 100% 100% - 44% 76% % 78% - Vegetation/Animal % % WILEY(16KV) - Customers: 2, Equipment Failure 100% 100% 49% 89% 97% 95% 100% 100% % 100% - 98% 55% - 98% 60% - Operation % 3% 5% % % 45% - 2% 40% - Other % % Vegetation/Animal % %