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AustinAustin EnergyEnergy
RollingRollingBlackoutsBlackoutsMission:Mission: Deliverclean,affordable,reliableenergyandexcellentcustomerservice.LarryWeis,GeneralManagerFebruary
10,
2011
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ERCOTgr serves
85% of
Texas
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consumption Thirdtimeinrecenthistor forAE 12 22 1989
4/17/2006,2/02/2011)
Additionalgeneration
unable
to
start
and
stay
online
ERCOTalertswhenreservesbelow3,000MW
Rollin blackoutsorderedb ERCOTaslast ste torestore
grid
balance
Ifgridfrequencydeclinesto59.3MHz,relaysactivateautomaticallytopreventsystemblackout
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EnergyControl
Center
staff
responded
to
ERCOT
directivetobe inloadsheddin immediatel
AEgenerationhadminor interruptions
12:01 6:00a.m. Over80generatingunitstrip&reducedoutput
2:47a.m. ReservesshortagebyERCOT
. . ,
5:17a.m. EnergyEmergencyAlertLevel2a(EEA2a)activatedEmergencyInterruptibleLoadService(EILS)andLoadsActingasResources(LaaRs)
. .
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EmergencyOperations
Center
(EOC)
shortly
after
ERCOTissuedEnergyEmergencyAlertLevel2a
(EEA2a)at5:17a.m.
6:14a.m.
AE
communicated
with
media
and
CorporatePIOinitiallyfollowedby
Ongoingstatusreportsthroughouttheday
AEmaintained
staffing
at
City
Of
Austin
Emergency
OperationsCenter(EOC) onceactivated
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ERCOTrequiresAEtodevelopaloadshedplan
AE
plan
is
to
shed
4%
share
of
1,000
MW
or
40
MW
via
rolling
blackouts Planincludes44circuitswithrotationstargetingabout710minute
Internalpolicyconsidersthefunctionandserviceofeachofthe376
circuitsin
service
at
any
given
time
332circuitsareexc u e rom oa s e p an
211 healthandsafetycriticalloadsandindustrialloads
31 servingdowntownnetwork
90 withautomatic
required
under
frequency
load
shed
relays
48circuitsutilizedforrollingblackoutsimpactingmorethan80,000or20%ofAEcustomers
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ServesCentralBusinessDistrict StateCa itolCom lex
andportions
of
West
Campus
Multiplecircuitsthatbackupeachother
Redundancyisautomatic,notcontrolledremotely
Dro in
acircuit
would
not
result
in
load
reduction
due
toredundancy
Droppingcircuitscouldpotentiallycauseoverloading
anddamage
to
facilities
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Definedasthosebenefitin ublicsafet securit
andhealth
Hospitals,inpatienttreatmentandsurgerycenterswithovernightfacilities
Licensed
eldercare
nursing
facilities,
dialysis
facilities,
Waterandsewagetreatmentfacilities
Publicsafety,military,detentionfacilities,911&311
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AEPlanbasedon1 000MWs stemwideloadshed
40MW
for
AE
ERCOTrapidlyincreasedloadsheddingrequirementto4,000MWsystemwide,160MWforAE
Duration
of
rolling
blackout
intervals
increased
to
30
45
Includedupto40circuitsatatimetomeetERCOTobligations
Poweroutages
also
occurred
outside
load
shed
operation
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About45commercial&industrialcustomersres ondedto
AEs
appeal
for
conservation
on
behalf
of
ERCOT AEstaffinconstantcontactwith500+customerstoencourage
loadconservationandprovideupdatesincluding:
Stateandlocalagencies
,
Hospitals
Industrialfacilities
Largeresidential
retirement
communities
AEstaffexpandedcommunicationstoincludesmall,
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AE lannedfortheweather
Outagecrews
were
ready
SomeweatherimpactonAEunits
400MWunitproducing90MWtrippedofflineat1:04a.m.andwasbackonlineat2:14a.m.priortorollingblackouts
. . . .consistentlyby12:54p.m.
25MWunitfailedtostartat4a.m.andwasonlineat2:33p.m.
AEswitched
from
gas
to
oil
in
a325
MW
Decker
unit
to
mitigatepotentialgassupplyissues
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Reviewsofthiseventalread initiatedb
PublicUtility
Commission
of
Texas
(PUCT)
ElectricReliabilityCouncilofTexas(ERCOT)
NorthAmericanElectricReliabilityCorporation(NERC)andTexasReliabilityEntity(TRE)
TexasSenate
Business
and
Commerce
and
Natural
Resources
Committees (Tuesday,February15)
TexasRailroadCommission (NaturalGasRegulation)
Policiesandloadshedplan
Communicationsprocedures
Otheralternatives
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