Circuit Reliability Review

Transcription

1 Circuit Reliability Review Tulare District 5 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 SAN JOAQUIN District CityList1 ARMONA COUNTY OF TULARE DELANO DUCOR EARLIMART EAST PORTERVILLE EXETER FARMERSVILLE GOSHEN HANFORD IVANHOE KINGS COUNTY LEMON COVE LINDSAY MCFARLAND PIXLEY POPLAR-COTTON CENTER PORTERVILLE RICHGROVE SPRINGVILLE STRATHMORE TERRA BELLA THREE RIVERS TIPTON VISALIA WOODLAKE WOODVILLE CITY OF TULARE TULE RIVER INDIAN TRIBE 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 Tulare District 5 CircuitList1 There are 46 circuits that serve Tulare District 5 1 Circuit Type Customers Circuit Type Customers Circuit Type Customers Circuit Type Customers BEATTIE(12KV) 1,321 RICHGROVE(12KV) BEAVER(12KV) 165 RIECK(12KV) BOWEN(12KV) 894 ROEDING(12KV) BURTON(12KV) 1,974 SAUCELITO(12KV) BURUM(12KV) 154 SKINKLE(12KV) CAMP NELSON(4.16KV) 696 SODA SPRINGS(12KV) CAPANERO(2.4KV) 300 SUCCESS(12KV) 2, CARATAN(12KV) 99 SUGARLOAF(2.4KV) CLAMPETT(12KV) 1,574 SUNSET(12KV) CLOER(12KV) 327 TEAPOT(12KV) 2, COUNTS(2.4KV) 46 VANDALIA(12KV) 1, DUCOR(12KV) 450 VOSSLER(12KV) EL MIRADOR(12KV) 821 WELCH(12KV) ELSTER(12KV) 1,551 WORTH(12KV) FLORY(12KV) 641 ZANTE(12KV) GOPHER(12KV) 117 ZION(12KV) GRANITE(12KV) 2, HATFIELD(12KV) 2, HOSSACK(2.4KV) HOUSTON(12KV) INTAKE(12KV) JOHNSONDALE(4.16KV) JORDAN(12KV) 1, JOSTEN(12KV) LANZA(12KV) MAHOGANY(12KV) MCCLENNY(2.4KV) MONACHE(12KV) 1, POSO PARK(2.4KV) PRATT(12KV) Grand Total 31,937 7

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9 Causes of Repair Outages in Tulare District SAIDIChart Contributions to SAIDI by Outage Cause 3rd Party 4.0% 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 Weather /Fire /Earthquake 78.9% Equipment Failure 8.0% Operation 7.0% Other 2.0% Vegetation /Animal 0.2% 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 Tulare District 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 Vegetation /Animal 1.4% Other 10.1% Weather /Fire /Earthquake 17.3% Operation 41.5% 3rd Party 17.0% Equipment Failure 12.8% 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 Tulare District 5 Updated through Dec 2017

14 Average Reliability of 46 Circuits Serving Tulare District 5 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 46 Circuits Serving Tulare District 5 -- Total Customers: 31, rd Party 11% 13% 18% 6% 15% 11% 10% 21% 29% 2% 4% 11% 21% 17% 35% 2% 28% 26% 14% 23% 31% 4% 17% 24% Equipment Failure 38% 42% 15% 29% 28% 13% 12% 16% 11% 21% 18% 10% 19% 14% 44% 1% 13% 27% 56% 4% 6% 8% 13% 24% Operation 3% 5% 1% 5% 7% 2% 59% 26% 5% 9% 21% 9% 41% 65% - 3% 13% 6% 13% 36% - 7% 41% 5% Other 12% 11% 28% 6% 8% 31% 6% 21% 31% 2% 10% 59% 2% 1% 6% 1% 14% 18% 17% 30% 59% 2% 10% 34% Vegetation/Animal 1% 4% 10% 1% 2% 8% 2% 11% 12% % 0% 0% 0% 0% 1% 1% 7% 4% 0% 1% 1% Weather/Fire/Earthquake 34% 25% 28% 53% 40% 35% 12% 6% 13% 65% 48% 10% 15% 3% 15% 93% 32% 20% % 17% 13% 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 Tulare District 5-1 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 BEATTIE(12KV) - Customers: 1, CircuitHistory rd Party Equipment Failure 57% 67% 100% 39% 50% 100% 14% 1% Operation % 49% % 100% % 49% - Other Vegetation/Animal % 99% Weather/Fire/Earthquake 43% 33% - 61% 50% % 51% 100% % 51% 100% BEAVER(12KV) - Customers: rd Party % 47% - 93% 99% 32% Equipment Failure 50% 59% - 12% 2% 42% 7% 1% Operation 50% 41% - 1% 1% Other % % Vegetation/Animal % 0% % Weather/Fire/Earthquake % 49% BOWEN(12KV) - Customers: rd Party % 94% 100% 63% 66% 84% 11% 82% % 91% 100% 18% 18% 81% 22% 51% 84% Equipment Failure 2% 1% - 4% 1% - 36% 34% 16% 89% 18% - 100% 100% - 33% 6% - 3% 0% - 45% 6% - Operation 2% 4% - 5% 2% - 1% 0% % 3% % 2% - Other 1% 1% - 6% 3% % 0% - 0% 0% - Vegetation/Animal % 82% 19% 18% 41% 16% Weather/Fire/Earthquake 96% 94% 100% BURTON(12KV) - Customers: 1, rd Party 79% 84% 9% % 18% 20% % % Equipment Failure 12% 14% - 100% 100% 19% 0% 0% % 0% 50% % 50% - 14% 0% 50% Operation % 23% - 100% 100% - 86% 100% % 100% - Other % % 11% 22% 1% % 50% - 2% 0% - Vegetation/Animal % 38% 79% Weather/Fire/Earthquake 10% 2% 61%

16 Reliability Histories for Individual Circuits Serving Tulare District 5-2 of 12 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 BURUM(12KV) - Customers: rd Party % 80% 50% % % Equipment Failure % 100% Operation % 1% % 100% % 2% - Other % % 100% 100% % 98% 15% Weather/Fire/Earthquake 100% 100% - 36% 20% CAMP NELSON(4.16KV) - Customers: ##### ##### rd Party Equipment Failure % 69% 15% 22% 33% - 22% 32% - 6% 46% 100% % 10% - 8% 25% 100% Operation % 31% - 45% 56% - 1% 8% - 94% 54% % 45% - 2% 33% - Other % 4% 4% % 45% - 1% 14% - Weather/Fire/Earthquake % 29% 7% - 77% 60% % 100% % 28% - CAPANERO(2.4KV) - Customers: rd Party Equipment Failure 91% 50% - 5% 1% - 98% 72% Operation 3% 25% - 5% 33% 20% 2% 3% % 100% - 37% 13% - Other % 2% 33% 60% % % % 100% % 87% 100% Vegetation/Animal % 0% 24% 25% Weather/Fire/Earthquake 6% 25% 33% 88% 33% CARATAN(12KV) - Customers: rd Party 28% 69% 15% 7% 44% Equipment Failure 70% 28% 28% 1% 3% - 100% 100% 76% % % Operation 1% 3% % Other % % % 100% 100% 49% % 100% 49% Vegetation/Animal 1% 0% 2% 2% 9% Weather/Fire/Earthquake % 45% 59%

17 Reliability Histories for Individual Circuits Serving Tulare District 5-3 of 12 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 CLAMPETT(12KV) - Customers: 1, rd Party % Equipment Failure 82% 72% 100% 100% 100% Operation 18% 28% % 50% - 43% 2% 72% 100% 100% % 62% 72% Other % 50% - 57% 98% 28% % 38% 28% Weather/Fire/Earthquake CLOER(12KV) - Customers: rd Party % 0% 33% Equipment Failure 59% 1% 100% % 3% % 100% % 100% - Operation % 97% 45% Other 41% 99% Weather/Fire/Earthquake % 100% 67% % COUNTS(2.4KV) - Customers: ##### ##### 6.0-3rd Party Equipment Failure % 10% Operation % 49% % 100% - 1% 49% - 32% 49% - 2% 49% - Other % 51% 41% 100% % 51% - 0% 17% - Weather/Fire/Earthquake % % 100% % 51% % 34% - DUCOR(12KV) - Customers: rd Party Equipment Failure 57% 98% 69% 3% 1% - 27% 4% Operation % 0% - 60% 47% 25% Other 43% 2% 31% 5% 1% 2% 13% 49% 75% % % Vegetation/Animal % 0% Weather/Fire/Earthquake % 98% 98%

18 Reliability Histories for Individual Circuits Serving Tulare District 5-4 of 12 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 EL MIRADOR(12KV) - Customers: rd Party % % 10% Equipment Failure 14% 16% - 24% 12% 3% 9% 2% - 28% 64% - 60% 67% - 98% 75% - 100% 100% 100% 50% 68% 57% Operation 0% 0% - 9% 3% 7% 12% 56% % 33% - 2% 25% % 2% - Other 86% 84% 50% % 72% 36% % 30% - Weather/Fire/Earthquake % 86% 90% 58% 32% 73% % % ELSTER(12KV) - Customers: 1, rd Party % 27% % 100% - 86% 82% - Equipment Failure 65% 50% 16% 71% 21% 8% 5% 28% 33% % 0% % 0% - Operation 0% 0% % 13% % 100% % 5% - Other % % % % % % % % Vegetation/Animal % 4% Weather/Fire/Earthquake 35% 50% 42% 29% 79% 80% 51% 28% % 100% 75% % 13% 17% FLORY(12KV) - Customers: rd Party % 94% % 99% % 98% - Equipment Failure % 26% 45% 50% % 3% 1% % 1% 31% Operation 100% 100% - 0% 0% - 5% 6% % 100% - 2% 0% - Other % % % % Vegetation/Animal % 100% % 1% - Weather/Fire/Earthquake % 55% % 0% 100% % 0% 45% GOPHER(12KV) - Customers: rd Party % 32% 31% 17% 66% - 100% 100% % 10% - Equipment Failure 100% 100% - 1% 1% - 6% 1% 31% % % Operation % 1% % 100% % 100% - 64% 86% - Other % % 71% 32% % 100% % 4% - Vegetation/Animal % 2% - 6% 1% 69% Weather/Fire/Earthquake % 65%

19 Reliability Histories for Individual Circuits Serving Tulare District 5-5 of 12 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 GRANITE(12KV) - Customers: 2, rd Party 56% 45% 91% % 50% % % 49% 50% Equipment Failure 35% 47% % 1% % 100% % 1% - Operation 0% 0% - 26% 45% - 52% 49% % 50% % 49% - Other % 55% - 35% 50% - 100% 100% % 1% - Weather/Fire/Earthquake 9% 7% 9% % % HATFIELD(12KV) - Customers: 2, rd Party Equipment Failure 22% 12% 50% 100% 100% % 50% % 1% - Operation 7% 3% % 50% % 100% - 5% 50% - 100% 100% - 89% 99% - Other % 50% Vegetation/Animal 7% 42% 50% Weather/Fire/Earthquake 64% 42% HOSSACK(2.4KV) - Customers: ##### ##### 7.0-3rd Party Equipment Failure 100% 100% Operation % 50% % 100% - 4% 67% - 33% 50% - 4% 57% - Other % 100% 50% 59% 50% 100% % 50% - 0% 14% - Weather/Fire/Earthquake % % 100% % 33% % 29% - HOUSTON(12KV) - Customers: rd Party % 100% % 80% 100% % 99% 100% 90% 93% 100% Equipment Failure 26% 1% % 1% - 3% 1% - Operation 32% 22% Other 41% 78% % 20% % 6% - Weather/Fire/Earthquake % 100% 100%

20 Reliability Histories for Individual Circuits Serving Tulare District 5-6 of 12 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 INTAKE(12KV) - Customers: rd Party Equipment Failure % 100% % 6% - 2% 1% - 12% 2% - Operation % 99% - 15% 19% - Other 95% 11% 100% % 16% 85% % 94% 100% % 24% 50% Vegetation/Animal % 75% Weather/Fire/Earthquake 5% 89% % 8% 15% 100% 100% 100% 100% 100% % 55% 50% JOHNSONDALE(4.16KV) - Customers: rd Party Equipment Failure % 33% Operation Other 99% 50% % % 34% % 17% - Vegetation/Animal % 34% Weather/Fire/Earthquake 1% 50% % 33% 66% 100% 100% - 100% 100% - 98% 66% % 83% - JORDAN(12KV) - Customers: 1, rd Party 0% 0% % % 86% 100% % 27% 4% Equipment Failure 50% 22% 8% 4% 0% - 6% 35% 2% % 3% - 3% 10% % 1% - Operation 23% 38% - 1% 6% 8% 92% 19% 1% 33% 38% - 3% 10% % 90% - 26% 62% - Other 4% 2% 45% 32% 45% 61% 0% 1% 69% % % 9% - 5% 5% 92% Vegetation/Animal 0% 0% % 0% 25% 19% % 50% 100% 3% 1% - 3% 2% 4% Weather/Fire/Earthquake 23% 39% 47% 64% 49% 4% 1% 19% 7% 67% 62% % 40% % 3% - JOSTEN(12KV) - Customers: rd Party % 12% 19% 100% % 17% 100% Equipment Failure % 1% Operation % 99% % 81% - 100% 100% % 83% - Other % 100% 100% Weather/Fire/Earthquake

21 Reliability Histories for Individual Circuits Serving Tulare District 5-7 of 12 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 LANZA(12KV) - Customers: rd Party % 75% Equipment Failure % 93% - 2% 0% - 98% 87% % 2% - Operation % 7% % 13% % 0% - Other % 24% 25% % 100% % 97% - Weather/Fire/Earthquake MAHOGANY(12KV) - Customers: ##### ##### rd Party Equipment Failure Operation % 96% % 100% - 0% 9% - 24% 39% - 3% 39% - Other % 8% 4% 100% % % 61% - 1% 23% 100% Weather/Fire/Earthquake % % 100% % 91% % 38% - MCCLENNY(2.4KV) - Customers: ##### rd Party Equipment Failure 54% 25% - 46% 19% - 3% 22% Operation 37% 50% % 34% Other % 23% 67% % 63% 49% 100% % 32% 100% Vegetation/Animal % 10% 33% 3% 28% 21% Weather/Fire/Earthquake 9% 25% 100% 41% 48% - 12% 16% 19% 37% 51% - 100% 100% % 68% - MONACHE(12KV) - Customers: 1, rd Party % % Equipment Failure % 11% 100% 49% 26% 100% % 9% - 100% 100% 100% % 44% 38% Operation 100% 100% 100% 67% 62% - 31% 37% % 91% % 56% - Other % 27% - 20% 37% Weather/Fire/Earthquake

22 Reliability Histories for Individual Circuits Serving Tulare District 5-8 of 12 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 POSO PARK(2.4KV) - Customers: ##### rd Party Equipment Failure 54% 25% % 17% Operation 36% 50% % 34% Other % 33% 66% % % % Vegetation/Animal % 0% 16% 20% Weather/Fire/Earthquake 9% 25% 100% 99% 67% - 3% 33% 20% PRATT(12KV) - Customers: rd Party % 99% 47% % 69% 100% 68% 50% % 61% 17% Equipment Failure 97% 97% 36% 89% 73% 100% Operation 3% 3% - 11% 27% - 1% 1% % 30% - 1% 0% 100% % 17% 83% Other % Vegetation/Animal % 0% 40% % 1% % 0% - Weather/Fire/Earthquake % % 50% % 21% - RICHGROVE(12KV) - Customers: rd Party % 72% 60% % 63% % 63% - Equipment Failure 63% 48% 44% 10% 3% - 84% 27% 16% Operation 37% 52% Other % 0% 2% 92% % % 37% 100% % 37% 100% Vegetation/Animal % 27% 5% 5% 2% Weather/Fire/Earthquake % 67% 3% RIECK(12KV) - Customers: rd Party Equipment Failure 15% 33% % 100% Operation 85% 67% - 15% 17% % 43% % 43% - Other % % % 57% % 57% - Vegetation/Animal % 50% Weather/Fire/Earthquake % 33%

23 Reliability Histories for Individual Circuits Serving Tulare District 5-9 of 12 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 ROEDING(12KV) - Customers: rd Party 51% 43% - 56% 74% Equipment Failure 1% 0% - 5% 0% - 28% 5% - 100% 100% 100% 0% 1% % 23% 95% Operation 2% 1% 85% 4% 0% Other 46% 56% 15% % 93% % 100% 100% 19% 36% 5% Vegetation/Animal % 1% 100% Weather/Fire/Earthquake % 26% 100% 1% 1% % 99% - 100% 100% % 41% - SAUCELITO(12KV) - Customers: rd Party 53% 25% - 20% 20% 37% % 99% % 50% - Equipment Failure 34% 37% 24% 79% 77% 63% % 100% 26% 14% 32% 15% Operation % 2% - 54% 68% - 100% 100% % 18% - Other 12% 38% 76% % % % Weather/Fire/Earthquake % 32% % 1% 100% % 0% 42% SKINKLE(12KV) - Customers: rd Party % 11% - 65% 77% 52% % 49% % 48% - Equipment Failure 21% 35% - 45% 38% 6% 15% 1% % 100% - 1% 1% - 95% 33% - 4% 2% - Operation % 0% % 50% - 5% 67% - 6% 49% - Other 79% 65% 100% 1% 1% 26% 10% 1% 35% % % Weather/Fire/Earthquake 0% 0% - 50% 50% 68% 10% 20% 13% SODA SPRINGS(12KV) - Customers: rd Party - - 5% % 22% Equipment Failure 75% 82% 50% 80% 93% 16% 15% 31% 40% 22% 23% - 61% 50% - 0% 1% - 16% 9% - 10% 13% - Operation % 10% - 1% 29% % 57% 8% % 24% 3% Other 10% 2% 45% % 11% 27% 11% % % 5% 42% 92% 84% 91% 100% 16% 48% 92% Vegetation/Animal % 0% % 50% 12% % 3% 3% Weather/Fire/Earthquake 15% 16% - 20% 7% 18% 15% 9% 49% 77% 48% 32% % 0% % 12% 3% 23

24 Reliability Histories for Individual Circuits Serving Tulare District 5-10 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 SUCCESS(12KV) - Customers: 2, rd Party 7% 9% 66% 30% 22% 55% 76% 68% 44% % 49% % % 15% 40% Equipment Failure 38% 69% - 36% 33% - 0% 0% % 1% 100% 45% 21% % 2% 20% Operation % 11% - 3% 11% % 79% - 100% 100% - 34% 68% - Other 26% 13% 34% % 0% 0% 56% % 51% % % 16% 40% Vegetation/Animal 1% 0% - 11% 19% - 21% 21% Weather/Fire/Earthquake 29% 9% - 10% 15% 24% SUGARLOAF(2.4KV) - Customers: ##### rd Party Equipment Failure 54% 25% - 33% 22% - 5% 21% Operation 36% 50% - 1% 15% - 72% 31% Other % 15% 67% 1% 8% 60% % % Vegetation/Animal % 0% 13% 19% Weather/Fire/Earthquake 9% 25% 100% 66% 48% - 21% 27% 21% SUNSET(12KV) - Customers: rd Party % 100% Equipment Failure % 0% % 100% % 25% - Operation 6% 0% - 57% 6% Other 94% 100% - 8% 0% % 100% % 75% - Weather/Fire/Earthquake % 93% 100% TEAPOT(12KV) - Customers: 2, rd Party % 14% 100% Equipment Failure 32% 57% - 74% 95% 100% 8% 3% % 54% 100% 93% 90% 100% % 34% 63% Operation 8% 25% % 42% % 46% % 27% - Other % 41% % 1% 0% - 7% 10% % 0% 37% Vegetation/Animal % 5% Weather/Fire/Earthquake 60% 18% 100% % 100% % 39% - 24

25 Reliability Histories for Individual Circuits Serving Tulare District 5-11 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 VANDALIA(12KV) - Customers: 1, rd Party % 6% 60% 44% 33% - 100% 100% 100% % 85% 100% Equipment Failure 39% 33% - 38% 51% - 38% 33% 42% % 100% - 80% 87% % 6% - Operation % 1% - 18% 34% 58% % 13% - 36% 22% - 4% 3% - Other % 78% - 7% 7% - Vegetation/Animal 0% 0% 76% % 0% Weather/Fire/Earthquake 60% 67% 24% 53% 42% 40% VOSSLER(12KV) - Customers: rd Party 100% 99% 61% % 46% % 100% % 99% - Equipment Failure 0% 1% - 48% 96% 100% 70% 50% - 100% 100% % 1% - Operation % 2% - 3% 4% Other % Weather/Fire/Earthquake % 3% WELCH(12KV) - Customers: rd Party % 49% - 100% 100% % 100% 100% % 100% 4% Equipment Failure 100% 100% - 5% 0% % 100% % 0% - Operation Other % % % % Vegetation/Animal % 27% Weather/Fire/Earthquake % 23% WORTH(12KV) - Customers: rd Party % 41% 100% Equipment Failure 100% 100% - 100% 100% - 15% 59% Operation % 0% Other % % Vegetation/Animal % Weather/Fire/Earthquake

26 Reliability Histories for Individual Circuits Serving Tulare District 5-12 of st Qtr nd Qtr rd Qtr th Qtr CircuitHistory12 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI ZANTE(12KV) - Customers: rd Party 99% 100% 100% 7% 23% 37% 93% 90% - 8% 4% % 100% 79% 30% 32% 79% Equipment Failure 1% 0% - 19% 4% - 3% 3% % 10% % 0% - Operation % 7% - 92% 96% % 67% - Other % % % 90% % 7% 2% 21% Weather/Fire/Earthquake % 73% ZION(12KV) - Customers: rd Party 14% 18% 82% % Equipment Failure 86% 82% - 0% 0% - 20% 1% - 100% 99% 100% 100% 100% 100% 100% 100% % 99% 100% Operation % 0% Other 0% 0% 18% 6% 30% 1% 80% 99% 10% 0% 1% % 1% - Vegetation/Animal % 0% 42% Weather/Fire/Earthquake % 70% 44% 0% 0% 90%