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).

Shasta Lake Reliability Indices:

CompanySAIDISAIFICAIDIASAIData Source
NORTH AMERICAN MEDIAN
90.01.181.6-IEEE STANDARD 1366-1998
PG&E (COMPANY WIDE)357.71.47244.1-CPUC REPORT DATED 7/12/2018
PG&E (NORTH VALLEY ONLY) 398.61.67238.5-CPUC REPORT DATED 7/12/2018
CITY OF SHASTA LAKE (2015)119.70.71168.999.977%2015 CALCULATIONS
(NO WEATHER EXCLUSIONS)
CITY OF SHASTA LAKE (2016)87.60.37234.999.983%2016 CALCULATIONS
(NO WEATHER EXCLUSIONS)
CITY OF SHASTA LAKE (2017)48.60.41117.599.991%2017 CALCULATIONS
(NO WEATHER EXCLUSIONS)
CITY OF SHASTA LAKE (2018)
22.70.2495.799.996%Major Event Days (MED) Excluded
CITY OF SHASTA LAKE (2018)
1420.71.241148.499.726%2018 Calculations, Carr Fire Included


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.

SAIDISAIFI

CAIDI