Exhibit to Agenda Item #1

Transcription

1 Exhibit to Agenda Item #1 Board Directors Meeting Wednesday,, scheduled to begin at 5:30 p.m. Customer Service Center, Rubicon Room Powering forward. Together.

2 Agenda 2016 SD-4 annual monitoring report Distribution system mitigation plan status 2017 year-to-date distribution system reliability 2

3 SD-4, Reliability Policy Meeting customer energy requirements is a core value of SMUD. Therefore: a) SMUD will assure all customer energy requirements are met. This will be accomplished through the use of: (i) its generation resources and purchase power portfolio 100 percent of the time; and (ii) its transmission assets to assure an overall availability of at least percent. b) SMUD will achieve distribution system reliability by: Limiting the average frequency of outage per customer per year to: With major event : Excluding major event : Limiting the average duration of outages per customer per year to: With major event: minutes Excluding major event: minutes Ensuring that no individual circuits exceed these targets for more than two consecutive years. For circuits that exceed these targets for two consecutive years, a remedial action plan will be issued and completed within eighteen months. c) SMUD will maintain the electric system in good repair and make the necessary upgrades to maintain load serving capability and regulatory standards. 3

4 SD-4, 2016 Reliability Results Generation and Transmission System Met customers energy supply needs 100% of the time through a combination of SMUD generation and purchase power supplies Generation Asset and Gas Pipeline Availability Thermal Generation 92.26% Hydro Generation 91.34% Thermal Generation June through September 98.99% Hydro Generation June through September 98.47% At system peak, 45% of the generation was provided by internal resources and 55% was provided by purchased power Overall availability of transmission system was % 4

5 SD-4, 2016 Reliability Results Distribution System Did not meet reliability metrics for outage duration and frequency With Major Events Excluding Major Events Metric SD-4 Limit 2016 Results SD-4 Limit 2016 Results SAIFI 1.33 SAIDI (minutes) (17% over limit) 95.0 (2% over limit) (26% over limit) 81.6 (19% over limit) 99.7% of all distribution circuits (736 circuits) met the reliability criteria 5

6 2016 Distribution System Reliability Performance Including Major Events Year End Results = 95.0 min. (2% over SD-4 limit) SD-4 Limit = 93.3 minutes Excluding Major Events Year End Results = 81.6 min. (19% over SD-4 limit) SD-4 Limit = 68.7 minutes Including Major Events Year End Results = 1.56 (17% over SD-4 limit) SD-4 Limit = 1.33 Excluding Major Events Year End Results = 1.44 (26% over SD-4 limit) SD-4 Limit = % All Other Outage Causes March Storm 14% 9% 20% All Other Outage Causes 8% March Storm 11% 14% Underground Cable Failures 13% Equipment Failures Bulk Substation Incidents 10% Vehicle Accidents 24% Average Outage Duration (SAIDI) 6 13% Underground Cable Failures Equipment Failures 14% Bulk Substation Incidents 14% Average Outage Frequency (SAIFI) Vehicle Accidents 20%

7 Outage Frequency (SAIFI) Performance Drivers Multi-Year Comparison SAIFI contribution from tree outages increased by 143% from 2015 SAIFI contribution from vehicle accidents increased by 14% from 2015 Three bulk substation incidents contributed to 14% of overall SAIFI in

8 Outage Duration (SAIDI) Performance Drivers Multi-Year Comparison SAIDI contribution from tree outages increased by 180% from 2015 SAIDI contribution from vehicle accidents increased by 80% from 2015 Three bulk substation incidents contributed to 10% of overall SAIDI in

9 2016 Worst Performing Circuits Nine circuits (1% of total circuits) exceeded the metrics for two consecutive years Twelve cable replacement projects issued Ten projects are complete Two projects are expected to be completed by December 2017, within the 18 months policy requirement 9

10 Distribution Reliability Mitigation Plan Completed - Performed targeted patrols on 69 kv lines and repaired deficiencies found - Over 2,000 trees were identified for removal or trimming and more than 50% have been addressed - Prioritized replacement of 69kV poles to prevent high impact outages - Expedited completion of infrared inspections at bulk substations to identify and correct potential deficiencies - Resolved problems on 44 existing remotely operable switches - Installed 41 additional remotely operable switches on targeted 69kV circuits to reduce outage duration (completion date: June 2017) - Balanced the number of customers served by 69 kv circuits to reduce number of customers affected by outages - Increased cable replacement footage by 30,000 feet to 390,000 feet; 420,000 feet in subsequent years In Progress - Continuing to identify and remove trees outside our rights-of-way corridors that are at risk of falling onto overhead lines (completion date: Q4-2017) - Using remote-sensing techniques to identify and map diseased trees (completion date: Q3-2017) - Relocating equipment, or installing barrier systems, on equipment hit by vehicles multiple times (ongoing) - Continuing to install highly reflective visibility strips (ongoing) - Installing animal guards at targeted substations most susceptible to animal caused outages (completion date: Q2-2017) - Developing a circuit breaker replacement strategy based on asset health index (completion date: Q4-2017) Other Considerations - Evaluating installation of additional 69kV remotely operable switches in targeted circuits to further reduce outage duration 10

11 2017 Distribution Reliability Update Comparison to YTD Thru May 31 SAIFI SAIDI 11

12 2017 Distribution Reliability Update Year-to-date performance significantly impacted by 4 major events - Rain/wind storms in January 3-4, January 7-10, January 18-22, and February 17 - Winds gusts up to 63 mph; 4 major events resulted in over 9 inches of rain - Over 340,000 customers affected - Outage duration (SAIDI) impact of 60.1 minutes - Outage frequency (SAIFI) impact of 0.55 Mitigation plan benefits - Existing 69kV remotely operable switches helped to reduce outage duration by an average of 5 minutes - No tree caused outages on lines where we completed trimming and/or removal prior to storms - No 69kV deteriorated poles that fell down during the major events With Major Events Excluding Major Events Metric SD-4 Limit 2017 YTD* Results 2017 YE Forecast SD-4 Limit 2017 YTD* Results 2017 YE Forecast SAIFI SAIDI (minutes) * 2017 YTD thru May 31,

13 Questions? Page 13