Transcript FPSC Infrastructure Workshop

FPSC Electric Utility
Infrastructure Workshop
Florida Municipal Electric Utilities
Alan Shaffer
Assistant General Manager - Delivery
Lakeland Electric
January 23, 2006
Florida Public Power Utilities
 33 Municipal Electric Utilities
 1.3 Million customer meters (15% of
Floridians)
 Distribution
 11,000 miles above ground
 7,600 miles underground
 Transmission
 1,700 miles above ground
 70 miles underground
 300 substations
 Every storm impacted at least one
municipal electric utility
Florida’s Public Power Utilities
=Winter Park
=Winter Park
Reedy Creek =
3
Nature of Storm Damage
 Transmission System
 Most transmission systems had little to
no damage
 Kissimmee had 74 poles down after Charlie
 Keys Energy had sailboat masts into some
transmission
Nature of Storm Damage
 Distribution System
 Vero Beach lost 100% of customers from Jeanne,
Lakeland lost 80%
 Minor to significant pole and wire failures
 Most caused from nearby tree/limb failures
 Lightning burning down wire
 Some pole failure attributed to successive storms
and water-softened earth
 Vehicles striking poles
 Underground
 Some flooding in coastal and low areas
 Some uprooting from tree failures
Nature of Storm Damage
 Substations
 Most experienced no substation damage
 Keys Energy Transformer LTC flooding and
138kv breaker bushing flashover from salt
contamination
 JEA had 3 substation transformers fail
within 1 week attributed to effects of
repeated reclosing into distribution faults
 Vero Beach had significant substation
switchgear damage from water intrusion
Mutual Aid
 FMEA and APPA Mutual Aid Agreements
Utilized
 Executed by all FMEA-member utilities
 Coordinated through FMEA Executive Director
and Mutual Aid Coordinator
 Worked closely with electric cooperatives and
investor-owned utilities
 Supplied FPL with Florida and out-of-state crews
 Received aid from not only Florida utilities but
municipals as far as Texas, Kansas, Ohio,
Wisconsin, and New England
Repair Standards
 All municipals utilizing external crews
assigned their own personnel to
oversee work and maintain standards
within reason (line and tree crews)
 Performed post-restoration
inspections to check reconstruction
and make additional corrections
 All utilities supplied most all their own
standard material for their repairs
Vegetation Management
 Routine Distribution Maintenance
 Most municipals have a 3-year trim cycle
 Keys Energy is limited to a 6-month growth trim
by local ordinance
 Tallahassee is on an 18-month cycle
 Some like Gainesville and Lakeland include
service drops
 Herbicides and growth retardant used
 Trimmed to four to six foot clearance
 Danger trees removed where possible
 Outage data used by some to target locations
 Joint tree trimming w/ telcos would be beneficial
Vegetation Management
 Routine Transmission Maintenance
 Most municipals maintain an annual
inspection/trim cycle
 Jacksonville Beach and Gainesville
inspect semiannually
 Trimmed to 10 to 15 foot clearance
Vegetation Management
 Post-Storm Inspection
 Most utilities inspect as part of the
system restoration inspection of outage
areas
 Some dependence on severity of storm
event
 Keys Energy and Jacksonville Beach
inspect all transmission and main circuits
Pole Inspections
 All municipals conduct pole
inspections
 Most are 5 to 8-year cycle
 Include conductors and connections
 Tallahassee conducts pole-by-pole
inspections of circuits with highest
number of interruptions
Undergrounding
 Have discussed undergrounding with community for
years
 Citizens appreciate learning the pros & cons
 Undergrounding does not solve all “hurricane” outage
problems
 Many citizens reluctant to pay for cost of conversion,
even with cost-sharing
 Some utilities considering converting overhead lines to
underground
 Winter Park beginning a selective conversion to
underground
 Vero Beach converting aging lines when justified
 Jacksonville Beach converting all overhead within 3
blocks from ocean
Design Changes
 Additional movement to spun concrete or steel poles and
higher wind load ratings
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Transmission and main line distribution
Kissimmee - distribution with 3-phase banks or 3-phase
risers
 Over-insulating substation tie-lines to reduce salt intrusion
outages near coast
 Winter Park installing 3-phase gang-operated switches to
speed sectionalizing, initiating an undergrounding program
 Some relocating rear-lot easements to street right-of-ways
 Key West
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Wind-load design of 165+ mph
Using more concrete poles
8-hour battery backup for traffic lights
Using more stainless steel hardware at some locations
Other Changes
 Several have shortened their pole and line clearance
inspection cycles and added more line clearance crews
 Several have become more aggressive with
removing/topping danger trees

Customers more willing to agree with clearance activities
 Majority experienced few repair material shortages
but some storm stock inventory levels adjusted based
on experiences.
 Vendor alliances
 Several reported Emergency Operations Plan changes
from lessons learned including:
 Revised personnel assignments
 Training substation or meter personnel to assist T&D
 Use retired personnel
 Making an earlier determination of mutual aid and
contract crew needs and securing logistical needs