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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:
| Company | SA IDI | SAIFI | CAIDI | ASAI | Data Source |
|---|---|---|---|---|---|
| PG&E (COMPANY WIDE) | 450.6 | 1.44 | 728.2 | - | CPUC REPORT DATED 7/15/2021 |
| PG&E (NORTH VALLEY ONLY) | 1979.0 | 2.56 | 772.2 | - | 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) | 22.7 | 0.24 | 95.7 | 99.996% | Major Event Days , (Carr Fire) Excluded |
| CITY OF SHASTA LAKE (2019) | 86.9 | 1.24 | 69.8 | 99.983% | New Wildfire Relay Settings Applied |
| CITY OF SHATSA LAKE (2020) | 71.0 | 0.52 | 135.3 | 99.986% | Fire Safety Shutoffs Excluded |
| CITY OF SHASTA LAKE (2021) | 12.5 | 0.31 | 39.9 | 99.998% | 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.