BVES Annual Reliability Public Presentation 2016 Performance December 13, 2017
Agenda Company Overview What is Electric Utility Reliability? Requirements & Definitions Reliability Indices 2016 Reliability Results Questions 2
COMPANY OVERVIEW 3
Company Overview Bear Valley Electric Service (BVES), a division of Golden State Water Company, is an investor-owned utility providing electrical distribution in a resort community located at approximately 7,000 feet in the San Bernardino Mountains 32-square-mile service territory surrounding Big Bear Lake Eight communities, including Big Bear Lake and Big Bear City Provides service to approximately 24,018 customers: Roughly 22,105 residential Roughly 1,913 commercial, industrial, and public-authority 4
Service Territory 5
WHAT IS ELECTRIC UTILITY RELIABILITY? 6
What is Reliability? Reliability is job No. 1 for electric utilities: Keeping the lights on! In an age of advanced grid technologies and cyber threats, the challenge is greater than ever BVES has a strong reliability record Electric service reliability means the continuity of electric service experienced by retail customers 7
Reliability Reporting In California, electric utilities evaluate reliability performance using four basic industry reliability indices calculated over a period of one calendar year Mandated by California Public Utilities Commission Decision 16-01- 008, Updating the Annual Electric Reliability Reporting Requirements for California Electric Utilities, of January 14, 2016 Institute of Electrical and Electronics Engineers (IEEE) 1366 standard is used in calculating the indices Reports issued each year in July for previous year: 2015 Reports at: http://www.cpuc.ca.gov/2016_aers/ 8
REQUIREMENTS AND DEFINITIONS 9
Measuring Reliability To measure reliability, utilities consider: Number of service interruptions Type of service interruption (momentary or sustained) Number of customers affected Length of interruptions Average restoration time Unplanned & planned outages We also consider Major Event Days such as major storms, earthquakes, wild fires, etc. in the analysis 10
Reliability Definitions Interruption: A single operation of an interrupting device (switch, breaker, fuse, etc.) that results in a voltage of zero Momentary Interruption: Outage lasting five minutes or less Sustained Interruption: Outage lasting longer than five minutes Major Event Day: A day in which the daily system outage exceeds a statistically derived threshold value (would only occur for major storms, earthquakes or other significant external events resulting in major outages) 11
RELIABILITY INDICES 12
Reliability Indices - SAIDI System Average Interruption Duration Index (SAIDI) is the amount of time on average a customer was without power in a year due to sustained interruptions Measured in units of time (minutes) over the course of a year 13
Reliability Indices - SAIFI System Average Interruption Frequency Index (SAIFI) is the number of times an average customer was without power in a year due to service interruptions lasting more than five minutes (sustained outage) Measured in interruptions per customer over the course of a year 14
Reliability Indices - MAIFI Momentary Average Interruption Frequency Index (MAIFI) is the number of times an average customer was without power in a year due to service interruptions lasting five minutes or less Measured in interruptions per customer over the course of a year 15
Reliability Indices - CAIDI Customer Average Interruption Duration Index (CAIDI) represents the average outage duration that any given customer would experience CAIDI may also be viewed as the average restoration time Measured in units of time (minutes) over the course of a year 16
2016 RELIABILITY RESULTS 17
Unplanned Outages (MED Excluded) Year SAIDI (Minutes) SAIFI MAIFI CAIDI (Minutes) 2007 39.1 1.2 1.6 31.6 2008 40.4 1.2 0.5 32.5 2009 13.8 0.1 1.5 150.6 2010 47.6 0.6 1.1 81.4 2011 23.9 0.3 2.1 78.7 2012 29.8 0.2 1.0 182.2 2013 63.1 1.6 0.4 38.7 2014 47.6 1.3 0.0 36.1 2015 48.4 0.8 0.3 61.2 2016 72.4 0.8 0.0 91.7 Ave 42.6 0.8 0.9 78.5 MED: Major Event Day - A day in which the daily system outage exceeds a statistically derived threshold value (occurs for major storms, earthquakes or other significant external events) 18
Unplanned Outages (MED Included) Year SAIDI (Minutes) SAIFI MAIFI CAIDI (Minutes) 2007 74.4 1.6 1.6 47.8 2008 332.1 3.0 0.5 111.3 2009 13.8 0.1 1.5 150.6 2010 118.6 0.6 1.1 194.4 2011 190.0 1.5 2.1 126.3 2012 29.8 0.2 1.0 182.2 2013 95.2 2.1 0.4 46.3 2014 71.6 2.1 0.0 33.8 2015 198.2 2.8 0.3 71.6 2016 323.6 2.5 1.3 129.0 Ave 144.7 1.6 1.3 109.3 MED: Major Event Day - A day in which the daily system outage exceeds a statistically derived threshold value (occurs for major storms, earthquakes or other significant external events) 19
How Do We Compare? 2016 Unplanned Outages MED Excluded SAIDI SAIFI MAIFI CAIDI SoCal Edison 106.3 1.0 1.3 112.0 San Diego Gas and Electric Company 72.8 0.6 0.4 117.4 PacifiCorp 96.2 0.7 2.6 134.0 Pacific Gas & Electric 93.7 0.9 1.5 99.8 Liberty (CalPeco) 213.6 1.5 1.1 145.0 Bear Valley Electric Service 72.4 0.8 0.0 91.7 2016 Unplanned Outages MED Included SAIDI SAIFI MAIFI CAIDI SoCal Edison 129.3 1.1 1.5 123.2 San Diego Gas and Electric Company 86.0 0.7 0.4 127.0 PacifiCorp 130.8 0.86 2.6 152.0 Pacific Gas & Electric 106.6 1.0 1.6 104.5 Liberty (CalPeco) 213.6 1.5 1.1 145.0 Bear Valley Electric Service 323.6 2.5 1.3 129.0 For all indices (SAIDI, SAIFI, MAIFI & CAIDI) lower is better MED: Major Event Day - A day in which the daily system outage exceeds a statistically derived threshold value (occurs for major storms, earthquakes or other significant external events) 20
Top 10 Major Outages Date Affected Circuit Event SAIDI (minutes) Cause 1/7/2016 Shay 40.7 Weather: Major winter snow storm. 3/11/2016 Shay 40.7 Weather: Extremely high winds blew broken branch into 34kV Line 1/31/2016 Lagonita 34.5 Third Party: Car Hit pole shearing pole 1/7/2016 Clubview 20.8 Weather: Major winter snow storm. 3/28/2016 Shay 19.1 1/13/2016 Shay 18.6 Weather: Wind storm caused tree branch to fall across two line phased causing short-circuit relay. Equipment Failure: Transformer at Pineknot Substation faulted and failed. 1/6/2016 Clubview 18.1 Weather: Major winter snow storm. 1/6/2016 Boulder 13.7 Weather: Major winter snow storm. 1/13/2016 Georgia 12.6 Equipment Failure: Transformer at Pineknot Substation faulted and failed. 12/16/2016 Paradise 11.1 Weather: Tree top broke off and fell into overhead circuit lines taking down wire and crossarm 1/7/2016 Shay 40.7 Weather: Major winter snow storm. 21
Worst Performing Circuit Top 1% of Worst Performing Circuits (WPC) Reporting Year Circuit Customer Count Substation Circuit -miles % UG % OH Number of Mainline Outages Sustained Momentary Preferred Reliability Metrics SAIDI- SAIDI SAIFI- SAIFI- 3YR 1YR 3YR 1YR Period Period Period Period 2016 Paradise 1085 Maltby 31.5 6 94 14 1 395.7 370.6 2.5 1.1 22
Requesting a Report Customers have the opportunity to request a circuit-level reliability report for their home or business Upon request, BVES will mail the report to the mailing address on file To request a report, contact BVES at (800) 808-2837 or email: customerservice@bves.com 23
QUESTIONS 24