Download - January 2009 SEMO Ice Storm Extreme Measures
January 2009 SEMO Ice StormExtreme Measures
IEEE-PES St Louis Chapter MeetingJune 18, 2010
Presented byDavid Wakeman
Vice President, Energy DeliveryAmerenUE
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AmerenUE
Founded 1902 Serves 1.2 million
electric customers and 127,000 natural gas customers
21,000 square mile service territory
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Missouri Counties Served by AmerenUE That Were Affected
Cape Girardeau Dunklin Mississippi New Madrid Pemiscot Scott Stoddard
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January 2009 Ice Storm
Up to 5” of ice accumulation Affected 36,500 customers The entire “bootheel” area
—including AmerenUE facilities—was seriously impacted
Over 4000 storm response personnel involved
Replaced 3800 poles and 1,440,000 ft of wire (273 miles)
All customers restored in 9 days
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Monday, January 26
Quantum Weather predicts the possibility of ice storm in southern 1/3 of state
Mobilized contractor resources and Missouri Valley resources to SEMO south—approximately 250 personnel
Mobilized 3 storm trailers and 1 Mobile Command Center
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Tuesday, January 27Day 1
At 4 a.m. only 800 customers out—Just the tip of the ICEberg
Major ice accumulation occurring throughout the day in SEMO south area
Decision made to move all AmerenUE resources to SEMO
Outage numbers climb throughout the day
Additional contractor resources procured
650 linemen and 350 tree trimmers engaged by end of day
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Wednesday, January 28Day 2
Ice continues to build—outage count over 36,000 in A.M.
6 counties in Bootheel are essentially without power
Base Logistics called in A.M. to support logistics effort
Decision made to use Extensive Damage Recovery Method
SEMO south divided into 8 “restoration islands”
1150 linemen and 450 tree trimmers engaged by end of day
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Thursday, January 29Day 3
2 helicopters employed to patrol 34 Kv system. Found 80 miles of line on the ground
Restoration plan is developed
Repair effort is focused on 34.5 Kv system to get substations re-energized
Massive amounts of devastation being reported
Established Field Logistics Team to help manage the logistics effort
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Restoration Progress
Sunday Feb 1 Most 34.5 kV circuits restored Released 1st Estimated Restoration Time
Monday Feb 2 All 34.5 kV circuits restored (except Portageville 71—30
miles to rebuild) Many distribution circuits restored
Tuesday Feb 3 Customer outages under 10,000 to start day Most customers restored by end of day
Wednesday Feb 4 All customers restored by end of day Work begins on Portageville 71
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SEMO Ice Storm%Customers Out by County
7.8%
97.7% 98.4% 99.6% 99.5% 94.5% 99.7%
0.0%20.0%40.0%60.0%80.0%
100.0%120.0%
Cape G
irarde
au
Dunkli
n
Mississ
ippi
New M
adrid
Pemisc
otSco
tt
Stodd
ard
Counties Served by AmerenUE
%Cust Out
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Percent of Customers Restored by DayCummulative
1% 6%17%
30%48%
60%76%
94% 98% 100% 100%
0%20%40%60%80%
100%120%
01/27
/2009
01/28
/2009
01/29
/2009
01/30
/2009
01/31
/2009
02/01
/2009
02/02
/2009
02/03
/2009
02/04
/2009
02/05
/2009
02/06
/2009
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Damage Summary
Virtually 100% of AmerenUE customers in 6 counties without power
34 KV Sub-transmission System 25 circuits out of service and requiring major
repair Portageville 71 (34kv) 30 miles long with 1 pole
left standing 35 distribution substations without power 20 customer subs without power
Distribution System 163 distribution circuits out of service
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Supply Chain IssuesComparison: SEMO Ice Storm vs. Sept 14, 2008 Storm (Hurricane Ike)
SEMO Ice Storm36,000 customers outOutage duration: 9 days
Major Material Installed 3800 poles 7000 cross arms 700 transformers 1,440,000 ft of wire (273 miles)
Sept 14, 2008 Wind Storm(Hurricane Ike) 161,000 customers outOutage duration: 4 days
Major Material Installed 38 poles 295 cross arms 58 transformers 69,000 ft of wire
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Extreme Situations call for Extreme Measures
Logistics Even if there would have been power, the
existing logistics infrastructure in the region could not have handled the influx of resources
Restoration Methodology Extensive Damage Recovery Method Restoration Island Concept Portageville 71 34.5 kV Circuit (completely
destroyed)—deployed three 2MVA generators Construction Standards—take advantage of the
situation to re-build to “old” circuits to “new” standards
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Logistics
15,500 Hotel Room Nights
2300 Alternative Sleeping Arrangements—bunk trailers, dorms, etc
76,000 meals 1250+ loads of laundry 44 buses
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Extensive Damage Recovery Method
Typical restoration method is to utilize Outage Analysis System to methodically restore orders from largest to smallest
Due to extreme amount of damage, decision was made to use the Extensive Damage Recovery Method Subtransmission system was restored/rebuilt first Feeders were then restored beginning at the
substation and working to the last meter
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Restoration Islands
The service territory in southern SEMO was divided into 8 separate “Restoration Islands” A management and support structure was
developed for each Island and restoration resources were assigned based on specific need
Material Staging sites were established for each Island
Operational Conference Calls were held every afternoon to discuss issues and manage resource and material allocations
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Portageville 71 34.5 kV Circuit
30 miles long with 1 pole left standing Provided power to 2 towns Decision was made early in the restoration
process to rent large generators to provide temporary power to the 2 towns
When all other circuits had been restored, resources were assigned to rebuild the Portageville 71 circuit
Using 500 linemen, the 30 miles of 34.5 kV circuit was rebuilt in 3 ½ days
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Lessons Learned
It is impossible to prepare for every contingency The ability to adapt is critical
Key Elements to Success Logistics—personnel resources are limited by the available
logistics infrastructure Supply Chain—the flow of material into the affected area
will affect restoration progress Incident Command Structure—ensured an integrated,
organized response Restoration Work Islands—provided a manageable
command and control structure in the field
Questions or Comments?