Katrina: Grid and Communications Power“This [Hurricane Katrina’s aftermath] may permanently...
Transcript of Katrina: Grid and Communications Power“This [Hurricane Katrina’s aftermath] may permanently...
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Katrina: Grid and Communications PowerPatrick L. ChapmanAssistant ProfessorUniversity of Illinois at Urbana-ChampaignFeb. 8, 2006Sponsored by:
National Science Foundation SGER: Katrina NSF ECS 05-54090
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Acknowledgements
PeopleDr. Philip Krein (co-PI)Mr. Wayne Weaver (Graduate Student)Mr. Alexis Kwasinski (Graduate Student)Dr. Kevin Tomsovic (NSF Program Manager)
OrganizationsDept. of EnergyNational Oceanic and Atmospheric Admin.Bell SouthEntergy Corp.Caterpillar Inc.
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Project Summary
Perform on-site data collection of damage to power and communications (phone)
PicturesDiscussions with local people, prof. contacts
Assess relative damage and impactElectric powerCommunications power – cell and landline telephone
Suggest improvements and priorities
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Selected Quotations““It doesnIt doesn’’t matter what kind of natural disaster it is, if you dont matter what kind of natural disaster it is, if you don’’t have t have power, the network doesnpower, the network doesn’’t work,t work,”” Mark Mark MarchandMarchand, Verizon , Verizon Communications Spokesperson.Communications Spokesperson.
““One thing that people donOne thing that people don’’t understand is the relationship between t understand is the relationship between the mobile phone network, the mobile phone network, loclocaal phone companies and the l phone companies and the commercial power companies. We depend on local phone and commercial power companies. We depend on local phone and power to run wireless networks,power to run wireless networks,”” John Taylor, Sprint Nextel Senior John Taylor, Sprint Nextel Senior Manager oManager off P Puublic Affairs.blic Affairs.
“There will be many power There will be many power and other issues to deal withand other issues to deal with…… Our Our equipment needs power to work, andequipment needs power to work, and while many sites have backup while many sites have backup generators or batteries, some ofgenerators or batteries, some of those sites may be flooded., those sites may be flooded.,”” Sal Sal TodaroTodaro, Sprint Nex, Sprint Nexttel Area Vice President of the Southeast.el Area Vice President of the Southeast.
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Selected Quotations (cont’d)““We expect our challenge there [New OrleansWe expect our challenge there [New Orleans’’ COs] will be to COs] will be to restore the power equipment with batteries and generators,restore the power equipment with batteries and generators,”” Bill Bill Smith, BellsouthSmith, Bellsouth Chief Technical Officer. Chief Technical Officer.
““This [HurricThis [Hurricane Katrinaane Katrina’’s aftermath] may permanently alter the s aftermath] may permanently alter the balance in New Orleans for the balance in New Orleans for the usage of cellular vs. traditionalusage of cellular vs. traditional wirewire--line phone service,line phone service,”” Roger Kay, Endpoint Technologies Associates Roger Kay, Endpoint Technologies Associates President.President.
““We just have to wait and see hoWe just have to wait and see how commercial power restoration w commercial power restoration and flooding go,and flooding go,”” Clay Owens, Cingular Spokesman.Clay Owens, Cingular Spokesman.
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Power Infrastructure
Grid powerTransmission linesDistribution
Landline telephoneCentral offices and SLCs
Cellular telephonesTowers
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On-Site Visits (10/16-10/23/05)
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New Orleans Area
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Main Power Grid
Transmission vulnerable but easily repairedA few main lines with relatively fast responseLines supply many people
Distribution linesComplex networkIndividual lines less importantLabor intensive repairsSubstations susceptible to floods
Poles and lines surprisingly resilient
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Backup to Main Grid
Mostly distributed generators (gensets)Normally diesel-powered turbines driving electric generators
Require regular refuelingMobile and fixed versions
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Pass Christian, MSStormStorm surge surge destroyeddestroyed mostmostfixedfixed gensetsgensets locatedlocated closeclose toto
thethe shoreshore
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Waveland, MS
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NEW ORLEANS BROADMOORNEW ORLEANS BROADMOOR
Satellite image from: http://Satellite image from: http://www.eurimage.comwww.eurimage.com
Water levelWater levelGensetGenset
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Portable Portable Generator setsGenerator sets
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Refueling and DeploymentGensetGenset being being
refueled (once refueled (once a day)a day)
New New gensetgensetnot connectednot connected
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Solar-Powered Electricity and Water Purification (rarely used)
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Biloxi, MS Substation
DebrisDebris
Missing connectionsMissing connections
Open doorOpen door
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Control building locationControl building location
Receding waterReceding water
Maximum water (storm Maximum water (storm surge + waves) levelsurge + waves) level
Mississippi River Delta, LAMississippi River Delta, LA
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Distribution Lines
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Distribution Lines
••Electrical power transmission and Electrical power transmission and distribution lines show some damage distribution lines show some damage but it is less significant than but it is less significant than centralized system parts such as centralized system parts such as central offices and substationscentral offices and substations
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Fixed Telephony
Coastal Central Offices (COs) damagedRely on batteries and gensets
Batteries good for about one dayGenerators last until fuel runs out (perhaps days)
Flooding damages equipmentTime-consuming to replace
Backup equipment limited and unreliableMostly for emergency lines
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CO #1CO #1
MAIN COMAIN CO+ TANDEM+ TANDEM
CO #2CO #2
CO #3CO #3
SLCSLC
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--48 48 VdcVdc
ac Mainsac Mains
acac
GeneratorGeneratorsetset
RectifiersRectifierscabinetcabinet
BatteriesBatteries
InverterInverter
SystemSystemmanagementmanagement
terminalterminal
SwitchSwitchTransmission Transmission
equipmentequipment
TransferTransferswitchswitch
CENTRAL OFFICE POWER SYSTEMCENTRAL OFFICE POWER SYSTEM
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Example CO Damage
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NEW ORLEANS LEVEE BREACHES IMPACTNEW ORLEANS LEVEE BREACHES IMPACT
Images from: http://Images from: http://www.thecentraloffice.com/index.htmlwww.thecentraloffice.com/index.html
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Pearlington, MS
SLC cabinetSLC cabinet
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Wireless Telephony
Cell towers disabled due to flooded ground cabinetsMany gensets deployed – logistical effortNatural absence of communication wires a big advantageRely on batteries for short-term outagesCells on wheels (COWs) deployed where electronics are damagedCell network mostly OK four days afterwardPole-mount electronics supplied with uninterruptible power supplies (UPS) – battery powered
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Cell Sites with Portable Gensets
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Cell on Wheels
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Cable TV Cable TV UPSsUPSs
Intact Intact UPSsUPSs on poleon pole
Damaged UPS on groundDamaged UPS on ground
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Perspectives
Difficult access, refueling needs, logistics, and availability are problems for gensetsMany backup plans don’t anticipate such a disasterCell networks more responsive
Of course we need power to charge cell phones!Poles and pole-mount devices held up better than imaginedFixed telephony extremely important but susceptible for a few miles in
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Perspectives (cont’d)
Team met many people outside metro areas where no help had come at all – power out for weeksPower-of-last-resort largely missing
Rapidly deployable and naturally distributed (e.g. like solar-battery combinations)
More expensive per kW-hr than gensets – is Katrina enough to make this a priority?
Human-powered devicesAd-hoc cell networks, flashlights, phones, etc.
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References
QuotationsQuotations[http://netscape.com.com/2102[http://netscape.com.com/2102--1037_31037_3--5907075.html?tag=5907075.html?tag=st.util.printst.util.print]][http://netscape.com.com/2102[http://netscape.com.com/2102--1037_31037_3--5907075.html?tag=5907075.html?tag=st.util.printst.util.print]][http://ww[http://www2.sprint.comw2.sprint.com/mr/news_dtl.do?id=7960]/mr/news_dtl.do?id=7960][http://telephonyonline.com/br[http://telephonyonline.com/broadband/news/Katrina_damage_Boadband/news/Katrina_damage_Bellsellsouth_090205]outh_090205][http://ww[http://www.w.msnbc.msn.com/id/msnbc.msn.com/id/9176867/print/1/displaymode/1099176867/print/1/displaymode/1098/]8/][http://ww[http://www.w.msnbc.msn.com/id/msnbc.msn.com/id/9176867/print/1/displaymode/1099176867/print/1/displaymode/1098]8]