austin energy briefing on system operations rolling blackouts

8/7/2019 Austin Energy Briefing on System Operations Rolling Blackouts

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AustinAustin EnergyEnergy

RollingRollingBlackoutsBlackoutsMission:Mission: Deliverclean,affordable,reliableenergyandexcellentcustomerservice.LarryWeis,GeneralManagerFebruary

10,

2011


2/15

2


3/15

ERCOTgr serves

85% of

Texas

3


4/15

4


5/15

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

5


6/15

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)

. .

6


7/15

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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8/15

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

8


9/15

9


10/15

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

10


11/15

Definedasthosebenefitin ublicsafet securit

andhealth

Hospitals,inpatienttreatmentandsurgerycenterswithovernightfacilities

Licensed

eldercare

nursing

facilities,

dialysis

facilities,

Waterandsewagetreatmentfacilities

Publicsafety,military,detentionfacilities,911&311

11


12/15

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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13/15

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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14/15

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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15/15

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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austin energy briefing on system operations rolling blackouts

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