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January 2009 SEMO Ice Storm Extreme Measures

January 2009 SEMO Ice Storm Extreme Measures. IEEE-PES St Louis Chapter Meeting June 18, 2010 Presented by David Wakeman Vice President, Energy Delivery AmerenUE. AmerenUE. Founded 1902 Serves 1.2 million electric customers and 127,000 natural gas customers

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January 2009 SEMO Ice Storm Extreme Measures

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  1. January 2009 SEMO Ice StormExtreme Measures IEEE-PES St Louis Chapter Meeting June 18, 2010 Presented by David Wakeman Vice President, Energy Delivery AmerenUE

  2. AmerenUE • Founded 1902 • Serves 1.2 million electric customers and 127,000 natural gas customers • 21,000 square mile service territory

  3. Missouri Counties Served by AmerenUE That Were Affected • Cape Girardeau • Dunklin • Mississippi • New Madrid • Pemiscot • Scott • Stoddard

  4. 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

  5. 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

  6. 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

  7. 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

  8. 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

  9. 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

  10. 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

  11. SEMO Ice Storm 36,000 customers out Outage 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 out Outage duration: 4 days Major Material Installed 38 poles 295 cross arms 58 transformers 69,000 ft of wire Supply Chain IssuesComparison: SEMO Ice Storm vs. Sept 14, 2008 Storm (Hurricane Ike)

  12. 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

  13. Logistics • 15,500 Hotel Room Nights • 2300 Alternative Sleeping Arrangements—bunk trailers, dorms, etc • 76,000 meals • 1250+ loads of laundry • 44 buses

  14. 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

  15. 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

  16. 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

  17. 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

  18. Questions or Comments?

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