FPSC Infrastructure Workshop
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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
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
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