Annual Outage Data

Reliability Review

What is Reliability?

Reliability Factors

How Do We Improve Reliability?

Reliability is improved by reducing outage frequency and duration through:

Reliability Statistics

What Happened in 2021?

2021 Overview

Key Outage Indicator Comparison

EVENT Totals 2021 Totals 2020 Previous 5 Year Average Change
Outages 312 345 323 3%
Interruptions 102,091 59,068 60,710 68%
Customer Hours 186,224 186,224 200,405 84%

Outage Causes

Outage causes pie chart. By customer hours: Trees 36%, storm related 22%, wind 7%, other 2%, motor vehicle 17%, overload 5%, district's equipment 4%, electrical failure 7%. By interruptions.: Trees 41%, storm related 18%, wind 6%, other 4%, motor vehicle 11%, overload 6%, district's equipment 4%, electrical failure 10%.
Equipment outages 2021 2020
Cut-Out 21 37
Transformer 9 16
Fuse 8 5
Conductor 7 10
Circuit Breaker 5 4
Aluminum (Insul) URD 5 7
Copper Wire 5 8
Aluminum Wire 4 2
Connector /Splice/Jumper 3 4
Terminations/Potheads 3 0
Service 2 1
Crossarm 2 1
Insulator 1 3
Switch 1 1
Recloser 1 1
Copper (Insulated) 1 2
Cubicle/Module 1 0
Grand Total 79 102

Tree Related Outages

Analysis

Tree Related Outages by Year

Number of outages. 2016: 152. 2017: 158. 2018: 138. 2018: 136. 2020: 185. 2021: 194.

Possible Areas of Focus

Looking at locations with 3 or more outages, we should take a closer look at these areas:

Areas of focus: South shore road. North Shore Road. Pacific Avenue. Ocean Beach Road. Aberdeen Gardens Road. East Wishkah Roadh. Gaissier Road. Hurd Road. North River Road. Kindred Avenue. Cloquallum Road. Upper Falls Creek Road. South Union Road. Abbott Road. Malone Hill Road.

Wrap-Up

Conclusion

Overall

  • Almost all key indicators were up compared to the previous year and the 5 year average

Trees

  • Tree related outages were up compared to the previous year and the 5 year average

Continued Focus

  • Stay focused on vegetation management overall and focus on improvements in high outage areas

Future

  • Review/update sectionalizing to improve exposure

Questions?

Annual Outage Data (PPTX)