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Electric Utility Infrastructure Commission Staff Workshop January 23, 2006

Electric Utility Infrastructure Commission Staff Workshop January 23, 2006. Overview. What did PEF see in the 2004 and 2005 hurricane seasons What did the 2004 and 2005 hurricane seasons reveal about PEF’s system and what have we done in response

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Electric Utility Infrastructure Commission Staff Workshop January 23, 2006

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  1. Electric Utility InfrastructureCommission Staff WorkshopJanuary 23, 2006

  2. Overview • What did PEF see in the 2004 and 2005 hurricane seasons • What did the 2004 and 2005 hurricane seasons reveal about PEF’s system and what have we done in response • What outage mitigation options may warrant additional study

  3. Tallahassee Orlando St Petersburg PEF System Impact Frances 100MPH Jeanne 110MPH Charley 145MPH

  4. Storm ComparisonOutage Experience Substations Out Transmission Miles Out Peak Customers Out

  5. Storm ComparisonDamage Experience Transmission Structures Damaged Distribution Transformers Replaced Distribution Poles Replaced

  6. Storm ComparisonRestoration Experience Peak Non-Native Resources Restoration Days Cost $ Million

  7. Damage Assessment • Transmission • Higher voltage performed better than lower • Concrete & steel performed better than wood • Substations • No significant damage within footprint • Outages primarily due to trees on connecting lines • Distribution • Tree-related damage prevalent • Codes / standards not a significant issue

  8. Damage AssessmentTransmission / Charley

  9. Damage AssessmentTransmission / Frances

  10. Damage AssessmentTransmission / Jeanne

  11. Customers Interrupted >80% 40-80% <40% Customers Interrupted >80% 40-80% <40% Damage AssessmentDistribution / Charley UG Outage Severity OH Outage Severity

  12. Customers Interrupted >80% 40-80% <40% Customers Interrupted >80% 40-80% <40% Damage AssessmentDistribution / Frances UG Outage Severity OH Outage Severity

  13. Customers Interrupted >80% 40-80% <40% Customers Interrupted >80% 40-80% <40% Damage AssessmentDistribution / Jeanne UG Outage Severity OH Outage Severity

  14. Potential Mitigation Approach

  15. Potential Outage Mitigation Options • Evaluate migration away from wood transmission poles • Further review and, if feasible, facilitate targeted underground conversion • Evaluate ways to facilitate vegetation management

  16. Potential Outage Mitigation Options • Evaluate migration away from wood transmission poles • Further review and, if feasible, facilitate targeted underground conversion • Evaluate ways to facilitate vegetation management

  17. Potential Outage Mitigation Options • Evaluate migration away from wood transmission poles • Further review and, if feasible, facilitate targeted underground conversion • Evaluate ways to facilitate vegetation management

  18. Potential Outage Mitigation Options

  19. Potential Outage Mitigation Options • Evaluate migration away from wood transmission poles • Further review and, if feasible, facilitate targeted underground conversion • Evaluate ways to facilitate vegetation management

  20. Tree Interference

  21. Tree Interference

  22. Tree Interference

  23. Tree Interference

  24. Concluding Thoughts • It makes sense to review our assumptions in light of 2004 and 2005 hurricanes • Take time to be sure changes truly are for the better • Recognize that there is no silver bullet and that all solutions come with a cost • PEF will continue to be active in evaluating alternatives that work for Florida

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