Welcome. Liberty Utilities Reliability Reporting Workshop. October 3 & 6, 2017

Transcription

1 Welcome Liberty Utilities Reliability Reporting Workshop October 3 & 6,

2 Agenda Purpose of Workshops System Overview Key Utility Initiatives Reliability Performance Plans for Reliability Improvements Questions 2

3 Service Territory Overview Purchased NV Energy s (SPPCo) California service territory in ,476 square miles; 50,000 customers Two office locations: South Lake Tahoe and Tahoe Vista Pay $2.8 million in annual property taxes and franchise fees in 7 counties 87 employees (43 in NLT; 44 in SLT) Regulated by the California Public Utilities Commission (CPUC) Winter Peaking Utility 3

4 What s it take to run an electric utility? 1,880 miles of O/H (1,400) and U/G (480) Distribution lines 13 Substations 12MW of Emergency Diesel Generation Max System Load: MW (Dec 2012) 57% Residential 43% Commercial 4

5 Where does the power come from? 5

6 What s important to our customers? 84% overall satisfaction Reliability (89%) and safe service (88%) top reasons for satisfaction 75% of customers said LU environmentally responsible Outage Notification How can I save money and energy? 65 Customers by 08/09/17 8:00 PM 6

7 Luning Solar Energy Center 50 MW solar facility Supplies approx. 25% of customers energy needs First Liberty Utilities-CA Electric owned generation facility 7

8 Solar Incentive Program (SIP) Launched Summer 2017 Residential, small commercial and school customers eligible Incentives to help with installation costs ($1.20/Watt AC) 25 applications in first month; 33 to date 8

9 What Else Do We Offer to Customers to Save Energy & Money? TOU Rates Commercial Rebates Free Energy Audits Refrigerator Rebates and free recycling Income-eligible programs Incentives to install EV chargers (coming soon) 9

10 Community Involvement Annual budget for community sponsorships and grants Seven high school and one community college scholarship awarded each year Energy Efficiency booth at events Employees volunteer at events like parades and food banks Partnerships with local chambers and business organizations 10

11 Outage Reporting and Tracking call

12 Emergency Notifications and 12

13 Reliability Improvements Veg Mgmt Program about $2.5 million per year 650 Electric Line Rebuild Project (completed Phase I) 13

14 Brockway Substation Repairs Explosion during winter storms 50+ years old structure Ideal: decommission Brockway and upgrade Kings Beach Interim: repair Brockway as much as possible 14

15 Power System Overview 15

16 Power Outage Causes Weather wind, snow, ice build up Trees Animals birds / squirrels Motor Vehicle Accidents Equipment Failure Loss of Source Power from NV Energy 16

17 Momentary or Sustained Outages Momentary outages that are less than or equal to 5 minutes in duration Tree branches contact a power line, burns the branch clear, and the circuit recloses automatically Sustained outages that are greater than 5 minutes in duration Tree falls through the power line and must be removed before re-energizing the line 17

18 Planned Outages and Major Events Planned Outage Outages where a customer or public official has made a request, or Liberty Utilities has provided notification These are excluded from reliability metrics Major Event Institute of Electrical and Electronic Engineers (IEEE) standard , a set of outages that exceed the historically expected outage duration (SAIDI) for at least one day 18

19 Measuring Reliability Every outages is analyzed to determine the following metrics: SAIDI = SAIFI = CAIDI = MAIFI = Total of Customer Interruption Durations Total number of customers served Total Number of Customers Interrupted Total number of customers served Total Customer Interruption Durations Total Number of Customer Interruptions Tot.No.of Customer Momentary Interruptions Total number of customers served 19

20 System SAIDI Performance 450 Distribution System Indices MED Excluded (SAIDI)

21 System SAIFI Performance 4.0 Distribution System Indices MED Excluded (SAIFI)

22 System CAIDI 250 Distribution System Indices MED Excluded (CAIDI)

23 System MAIFI 4.0 Distribution System Indices MED Excluded (MAIFI)

24 Worst Performing Circuits Circuit Customers Substation Circuit Miles OH UG Circuit Outages Circuit SAIDI Circuit SAIFI Topaz % 9.3% Squaw Valley % 37.0% Analysis of worst performing circuits excludes planned and Major Event outages. The preferred metric for this analysis is circuit level SAIDI in order to account for population discrepancies between urban and rural circuits. 24

25 Topaz 1261 Circuit Services Coleville, Walker Approximately 750 customers 1,281 poles 69.1 miles O/H 7.7 miles U/G Radial source from Yerington, NV approx. 50 miles 25

26 Plans to Improve Topaz 1261 Replaced aging poles throughout the circuit Over $500,000 invested Upgrade/Replace conductor that has low capacity, extensive splices, or damage from wire slapping Over $100,000 invested in 2016 Additional $100,000 budgeted in 2017 to continue this reconductor project 26

27 Working With NVE Topaz 1261 circuit under review Thorough inspections of all line equipment Review of circuit protection New NVE substation to be built by end of 2018 in Smith Valley Stronger source into the Topaz area Shortens the radial source exposure 27

28 Squaw Valley 7201 Circuit Services Alpine Meadows Approximately 600 customers 388 poles 20.8 miles O/H 12.2 miles U/G 28

29 Plans to Improve 7201 Circuit Improve backup ability from the Tahoe City 7100 circuit Install a new switch between the two circuits on the backside of Alpine Meadows Reconfigure underground circuit and install switches where appropriate to strengthen the circuit tie - TBD 29

30 West Shore 7300 Circuit Part of Tahoe City Timberland Tahoe Pines Homewood Tahoma Meeks Bay Rubicon 4,500 customers along a 17 mile circuit backbone 30

31 West Shore Improvements Installation of modern Viper Reclosers Completed. This enhances sectionalizing capabilities Approximately $150,000 invested in 2017 Continue to upgrade re-conductor project in Rubicon and Meeks Bay, toward Homewood In Progress. This will allow more restoration flexibility during contingencies Approximately $300,000 to be invested in

32 Thank you. Or call Customer Service at