Reliability

The City of Shasta Lake practices cost-effective management and consistent implementation of reliability investments and initiatives critical to maintaining and/or improving customer satisfaction and system reliability. The City strives to choose the most cost effective discretionary projects/practices with the greatest benefit to cost ratio to improve reliability.

Reliability Projects and Practices:

  • Aggressive tree trimming to minimize tree related outages
  • Installed New SCADA Master w/ alarm notification
  • Mitigate recurring outages by employing such things as squirrel transformer bushing cover-ups
  • Advanced Meter Infrastructures so we are notified of an outage as soon as possible
  • Fusing Distribution tap lines so the protection zones are more localized
  • Install additional line reclosing devices to keep the most customers on when we have an event
  • Implemented a new mobile electronic inspection program to track and triage issues in the electric distribution system.
  • Upgraded critical connections to reliable wedge connectors (Boltless Connectors).
  • Bought and implemented a new fault location mapping program, which enables the Utility to dispatch crews to a more pinpointed area when electrical issues arise.

Shasta Lake Reliability Indices:

CompanySA IDISAIFICAIDIASAIData Source
PG&E (COMPANY WIDE)450.61.44728.2-CPUC REPORT DATED 7/15/2021
PG&E (NORTH VALLEY ONLY) 1979.02.56772.2-CPUC REPORT DATED 7/15/2021
CITY OF SHASTA LAKE (2016)87.6
0.37
234.9
99.983%
2016 CALCULATIONS
(NO WEATHER EXCLUSIONS)
CITY OF SHASTA LAKE (2017)48.6
0.41
117.5
99.991%2017 CALCULATIONS
(NO WEATHER EXCLUSIONS)
CITY OF SHASTA LAKE (2018)22.70.2495.799.996%Major Event Days , (Carr Fire) Excluded
CITY OF SHASTA LAKE (2019)
86.91.2469.899.983%New Wildfire Relay Settings Applied
CITY OF SHATSA LAKE (2020)
    71.0  0.52  135.399.986%Fire Safety Shutoffs Excluded
CITY OF SHASTA LAKE (2021)

12.50.3139.999.998%Fire Safety Shutoffs Excluded 


TABLE TERMS

  • SAIDI - This term represents the average number of outage minutes (due to sustained outages) per customer served.
  • SAIFI - This term represents the average number of interruptions (due to sustained outages) per customer served.
  • CAIDI - This term gives the average outage duration that any given customer would experience (restoration time).
  • ASAI - This term is the ratio of the total number of customer hours that service was available to the number of hours in a year.

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