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Reliability Programs at Arizona Public Serivce

Reliability Programs at Arizona Public Serivce. Donald Lamontagne Engineering Manager Reliability Analysis and Standards Western Underground Committee Hotel Valley Ho Scottsdale, AZ September 26, 2012. Distribution Reliability Measurements. IEEE 1366 – 2003

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Reliability Programs at Arizona Public Serivce

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  1. Reliability Programs at Arizona Public Serivce Donald Lamontagne Engineering Manager Reliability Analysis and Standards Western Underground Committee Hotel Valley Ho Scottsdale, AZ September 26, 2012

  2. Distribution Reliability Measurements • IEEE 1366 – 2003 • Momentary/Sustained Threshold defined • System Average Interruption Frequency Index • All Weather • Clear Weather • System Average Interruption Duration Index • Momentary Average Interruption Frequency Index • Customer Average Interruption Duration Index • Major Event Day

  3. 44% Improvement

  4. 30% Improvement

  5. 49% Improvement

  6. 45% Improvement

  7. 14% Improvement

  8. 28% Decline

  9. Reliability Target Setting • Assumption – Previous maintenance is reflected in future performance • 10 Year Trend • Data uncertainty bands help guide Threshold, Target, Max • Targets have to be set before the close of the year so a level of uncertainty exists

  10. Example for SAIDI DRAFT

  11. Example for SAIFI DRAFT

  12. Example for FO/HMY DRAFT

  13. Planned Maintenance Scoreboard • Purpose • History • Challenges • Target Setting • Reporting • Benefits

  14. Planned Maintenance Scoreboard

  15. Planned Maintenance Details

  16. Planned Maintenance Details

  17. 2000 vs. 2011 Comparisons • Customer base up 35% (834,136 vs. 1,124,013) • Customer Interruptions down 17% (1,303,264 vs. 1,075,367) • SAIFI down 44% • Customer Hours Interrupted up 11% (1,732,670 vs. 1,919,439) • SAIDI down 30%

  18. 2000 vs. 2011 Comparisons • Biggest Improvements in CI and SAIFI • Weather - Storm Related (118,255) (0.11) • Foreign Interference - Dig-ins Customer/Contractor (57,039) (0.05) • Underground Cable (46,318) (0.04) • Weather – Lightning (41,021) (0.04) • Equipment Failure – APS (33,096) (0.03)

  19. 2000 vs. 2011 Comparisons • Biggest Improvements in CHI & SAIDI • Weather - Storm Related (207,632 hrs) (11 min) • Foreign Interference - Dig-ins Customer/Contractor (52,980 hrs) (3 min) • Underground Cable (47,373 hrs) (3 min) • Foreign Interference – Vehicles (43,517 hrs) (2 min) • Weather – Lightning (41,976 hrs) (2 min)

  20. Asset Management EHV Efforts (2000 – 2013) • Focus on FC – CH – PP (1963), FC – MK – ELD (1966), and NV – WW (1973) systems • Series Capacitor Banks (13 @ ~ $5.5M each) • Reactors (27 @ ~ $3M each) • Circuit Breakers (~ 50 @ ~ $1M each) • Transformers (10* ~ $3M each) * 7 were WW fire replacements

  21. Asset Management Replacement Focus

  22. Critical Transformer Examples • Cholla 230/69kV #1 – 52 years • Cholla 345/230kV #7 – 51 years • Four Corners 345/230kV #8 – 51 years • Four Corners 230/69/4.16kV #1 & #2 – 45 and 49 years • Saguaro 525/115kV #4 & #7 – 37 years • Cholla 525/345kV Bank #3 & #6 – 33 and 37 years

  23. Asset Management Replacement Focus

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