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Solar Power Heated Power Lines

Solar Power Heated Power Lines. PReparing for ice storms Physics and Human affairs with professor melody thomas. Presented by Jill Green, Jaewung Ryu , Scott Stilwell. What is an ice storm?.

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Solar Power Heated Power Lines

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  1. Solar Power HeatedPower Lines PReparing for ice storms Physics and Human affairs with professor melody thomas Presented by Jill Green, JaewungRyu, Scott Stilwell

  2. What is an ice storm? The U.S. National Weather service defines an ice storm as the accumulation of at least .25 inches of freezing rain. Freezing rain is caused by rain droplets that encounter freezing or sub freezing temperatures at the surface. The rain freezes on contact with the ground or objects near the surface. Ice accumulates on the roads, tree limbs, power lines, etc.

  3. Just one inch of ice on a single span of power line weighs as much as 1,250 pounds!

  4. Ice Storm of NWAJanuary 2009 Ozarks Electric Cooperative storm statistics 65,800 members at the time of storm 50,000 without power initially 17 days to fully restore power $17 million to repair damaged infrastructure 200-210 personnel brought in to assist in restoration efforts $400,000 in lost revenues to Ozarks Electric

  5. Photos taken in Springdale, AR during January 2009 ice storm

  6. Sagging lines require repair-even if they don’t actually snap

  7. Could we bury the power lines to reduce outages? • Cost – Would require investing over $3-5 billion The estimated cost per mile…$1million • Time – 5600 miles of overhead lines would take decades to complete • Maintenance-the maintenance requires extended downtime and disturbs landscaped yards • Misconception about immunity to outages-outages still occur due to excavation, burrowing animals, flooding • Greg Anderson of GE Engineering stated In some areas Arkansas Bedrock prohibits feasible/economical access to allow burial.

  8. Solar Powered Heated Power Lines… A new alternative? • What is it? A single stranded line overlapping existing overhead line that is warmed with solar power • How does it work? With stored solar power it prevents freezing rain from freezing on lines • What would it cost? - Approximately $22,000 per mile • Installation – requires no digging and minimal personnel • To be used where? Used on overhead lines near critical areas not subject to falling trees/limbs

  9. With No Heating System in Place Ice Precipitation The accumulation of ice causes added weight to the lines, results in downed out of service power lines. Broken Power Lines Electric pole

  10. Improved Concept with Heated System Heating elements wrapped around, power lines. Solar Panel- used to gather the Suns energy to be converted into DC electricity. Solar Energy Captured by solar panel for storage, transferred to storage. (battery) Power wire from storage to heating elements. Melted Ice Thermostat- When the temperature reaches 33° F, it controls when the heated wires are active. DC Electric Storage Ground

  11. Materials and Costs

  12. Works Cited “Winter Storms.” The Weather Channel Storm Encyclopedia.www.weather.com “When ice and heavy snow bring down limbs and power lines.” Tipmont REMC Touchstone Energy Cooperative. www.Tipmont.org. Jan 2011 Shackelford, Scott. “Bury Lines.” NWA Online. NW Arkansas Times. 3 Feb 2009 Photo 1: www.exploringweather.com/winterstorms.html Photo 2: www.nc-climate.ncsu.edu Photos 3,4 and 5: www.extremeinstability.com/09-1-28.htm Photo 6: www.firsthandweather.com/wp-content/uploads/2013/01/icestormoklahomadec17th2011.png Photo 7: energytrendsinsider.com Photo 8: www.extremeinstability.com/09-1-28.htm

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