Electric Utility Infrastructure Commission Staff Workshop January 23, 2006.
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Electric Utility Infrastructure Commission Staff Workshop January 23, 2006
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Transcript of Electric Utility Infrastructure Commission Staff Workshop January 23, 2006.
Electric Utility Infrastructure
Commission Staff Workshop
January 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
PEF System Impact
Orlando
Tallahassee
St Petersburg
Charley 145MPH
Fran
ces
10
0MPH
Je
anne
110M
PH
4
Storm ComparisonOutage Experience
700
1,131
853
Charley Frances Jeanne
502
833
722
Charley Frances Jeanne
83
105
86
Charley Frances Jeanne
Peak Customers OutTransmission Miles OutSubstations Out
5
Storm ComparisonDamage Experience
1,880
1,560
570
Charley Frances Jeanne
630
211
75
Charley Frances Jeanne
3,820
2,800
100
Charley Frances Jeanne
Transmission Structures Damaged
Distribution Transformers Replaced
Distribution Poles Replaced
6
Storm ComparisonRestoration Experience
9
6
5
Charley Frances Jeanne
5,122
4,600
3,687
Charley Frances Jeanne
146
129
86
Charley Frances Jeanne
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
Damage AssessmentDistribution / Charley
OH Outage Severity UG Outage Severity
Customers Interrupted
>80%40-80%<40%
Customers Interrupted
>80%40-80%<40%
12
Damage AssessmentDistribution / Frances
Customers Interrupted
>80%40-80%<40%
Customers Interrupted
>80%40-80%<40%
OH Outage Severity UG Outage Severity
13
Damage AssessmentDistribution / Jeanne
Customers Interrupted
>80%40-80%<40%
Customers Interrupted
>80%40-80%<40%
OH Outage Severity UG 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
