5/17/2000 Summer Preparedness 2000 1
Dec 24, 2015
5/17/2000 Summer Preparedness 2000 1
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SRPSRPSUMMER PREPAREDNESSSUMMER PREPAREDNESS20002000
Presented to thePresented to the
Arizona Corporation Arizona Corporation CommissionCommission
May 17, 2000May 17, 2000
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Dave AreghiniDave Areghini
Associate General Manager,Associate General Manager,
Power, Construction andPower, Construction and
Engineering ServicesEngineering Services
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AGENDAAGENDA
Summary of Year 2000 Projected Summary of Year 2000 Projected Conditions and SRP Generating Plant Conditions and SRP Generating Plant ReadinessReadiness
Resources and ReservesResources and Reserves
SRP Transmission and DistributionSRP Transmission and DistributionSystem ReadinessSystem Readiness
Emergency Operations and Load Emergency Operations and Load SheddingShedding
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SUMMARY OF YEAR 2000 SUMMARY OF YEAR 2000 PROJECTED CONDITIONSPROJECTED CONDITIONS
Transmission is adequate to meet Transmission is adequate to meet the forecasted peak load and the forecasted peak load and reservesreserves
SRP generation is ready and SRP generation is ready and purchases are adequate to meet the purchases are adequate to meet the forecasted year 2000 demandforecasted year 2000 demand
Emergency plans are in place to Emergency plans are in place to handle contingency eventshandle contingency events
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John CogginsJohn Coggins
ManagerManager
Supply and TradingSupply and Trading
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OPERATING RESERVESOPERATING RESERVES
Protect Against Loss of Generation Protect Against Loss of Generation or Transmission Resources Used to or Transmission Resources Used to Deliver Energy to Firm Load Deliver Energy to Firm Load
Targeted Reserve Levels Based on:Targeted Reserve Levels Based on:• Amount of Firm LoadAmount of Firm Load• Largest Single HazardLargest Single Hazard
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SUMMER 2000 RESERVESSUMMER 2000 RESERVES
JunJun JulJul AugAug SepSep
Load (MW)Load (MW) 48714871 50845084 5084508446964696
Actual Reserves*Actual Reserves* 624624 636636 624624 624624
Reserves Reserves
Inside ValleyInside Valley 447447 209209 277277 624624
Outside ValleyOutside Valley 177177 427427 347347 00* * Meets WSCC and NERC Criteria Meets WSCC and NERC Criteria Meets Southwest Reserve Sharing Group Meets Southwest Reserve Sharing Group
CriteriaCriteria
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WWWW
LBLB
KY/SKKY/SK
MDMD
NVNV
PPPP
FC/CR/HYFC/CR/HY
COCO
SRP Distribution SRP Distribution TerritoryTerritory
Valley Reserves Valley Reserves
209 MW209 MW
Available Import Available Import Capability 0 MWCapability 0 MW
ALL UNITS ON LINE - JULYALL UNITS ON LINE - JULY
PVPV
Outside Valley Outside Valley Reserves 427 MWReserves 427 MW
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RESULTRESULTPeak Load Day (5084 MW) in JulyPeak Load Day (5084 MW) in July
Outside Valley RecoveryOutside Valley Recovery– Full Recovery From Loss of Largest Generating UnitFull Recovery From Loss of Largest Generating Unit
andand– Full Recovery From Loss of Unit Less Than 245 MWFull Recovery From Loss of Unit Less Than 245 MW
Inside Valley RecoveryInside Valley Recovery– Full Recovery From Loss of Largest Generating UnitFull Recovery From Loss of Largest Generating Unit
andand– Full Recovery From Loss of Unit Less Than 28 MWFull Recovery From Loss of Unit Less Than 28 MW
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COORDINATING VALLEY COORDINATING VALLEY UNIT COMMITMENTUNIT COMMITMENT
APSAPSMerchantMerchant
SRPSRPMerchantMerchant
SRPSRPCAOCAO
APSAPSCAOCAO
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GLEN CANYON GLEN CANYON LOW FLOW TESTINGLOW FLOW TESTING
Test Flows Implemented May - SeptemberTest Flows Implemented May - September• Result of 1994 Biological Opinion by USF&WSResult of 1994 Biological Opinion by USF&WS• Requires Low Steady Flow At 8,000 cfs June - Requires Low Steady Flow At 8,000 cfs June -
SeptSept
Reduces Plant Output by Several Hundred Reduces Plant Output by Several Hundred
MWMW• Impacts Market Pricing in the SWImpacts Market Pricing in the SW• Impacts Exchange Arrangements with SRP Impacts Exchange Arrangements with SRP
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GLEN CANYON GLEN CANYON LOW FLOW TESTINGLOW FLOW TESTING
Emergency Exception Criteria In Emergency Exception Criteria In EffectEffect• Activation Requires System Wide Activation Requires System Wide
EmergencyEmergency
Testing May Be Abandoned Due to Testing May Be Abandoned Due to
HydrologyHydrology
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SRP TRANSMISSION SRP TRANSMISSION AND DISTRIBUTIONAND DISTRIBUTIONSYSTEM READINESSSYSTEM READINESS
Dave AreghiniDave Areghini
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SYSTEM IMPROVEMENTSSYSTEM IMPROVEMENTS
Items Increasing Import Capability Items Increasing Import Capability
• Knox 230kV receiving station and Knox 230kV receiving station and 1-230/69 transformer1-230/69 transformer
• Four 46 MVAR 69kV capacitor banks at Four 46 MVAR 69kV capacitor banks at
Brandow, Brandow, Papago Buttes, White Tanks and KnoxPapago Buttes, White Tanks and Knox
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SYSTEM IMPROVEMENTSSYSTEM IMPROVEMENTS
Items Serving Increasing Distribution Items Serving Increasing Distribution Load Load
• 22ndnd Ward 230/69kV transformer Ward 230/69kV transformer
• Multiple line upgradesMultiple line upgrades
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Load Serving CapacityLoad Serving Capacity
N-0 Continuous & Emergency Limit 5339 MWN-0 Continuous & Emergency Limit 5339 MW
N-1 Continuous & Emergency Limit 5229 MW
Forecasted Base Peak 4970 MW
Forecasted Upper Peak 5084 MW
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SYSTEM PREPARATIONSYSTEM PREPARATION
• Major Line PatrolsMajor Line Patrols• Preventative Preventative
MaintenanceMaintenance• Pole Work Pole Work • Personnel Training Personnel Training
• Tree TrimmingTree Trimming• Cable Cable
Replacement Replacement • Storm PlanStorm Plan
Summer Substation and Line Summer Substation and Line Maintenance CompleteMaintenance Complete
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EMERGENCY OPERATIONS EMERGENCY OPERATIONS AND LOAD SHEDDINGAND LOAD SHEDDING
System NormalSystem Normal
Capacity CriticalCapacity Critical
Capacity EmergencyCapacity Emergency
Pre-load SheddingPre-load Shedding
Rotating BlackoutsRotating Blackouts
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CAPACITY CRITICALCAPACITY CRITICAL
Potential for Operating Reserve Potential for Operating Reserve Deficiency if a Major Resource is Deficiency if a Major Resource is Lost Lost
Warning Issued to All PlantsWarning Issued to All Plants
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CAPACITY EMERGENCYCAPACITY EMERGENCY
Potential for loss of load if a major Potential for loss of load if a major resourceresourceis lost (reserves are depleted)is lost (reserves are depleted)
Staff unmanned hydro unitsStaff unmanned hydro units
Stop maintenance that could jeopardizeStop maintenance that could jeopardizeunit availabilityunit availability
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CAPACITY EMERGENCYCAPACITY EMERGENCY
Prepare to:Prepare to:• Cut wholesale salesCut wholesale sales• Utilize emergency generation, reduceUtilize emergency generation, reduce
auxiliary loads auxiliary loads
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ROTATING BLACKOUTSROTATING BLACKOUTS
Predetermined program has Predetermined program has alreadyalreadyprotected critical loads such asprotected critical loads such ashospitalshospitals
Load shedding program curtails Load shedding program curtails delivery of power to retail delivery of power to retail customerscustomers
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SRP Control Area Load
0
1000
2000
3000
4000
5000
6000
1 4 7 10 13 16 19 22
Hour
MW Series1
Series2
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SUMMARY OF YEAR 2000 SUMMARY OF YEAR 2000 PROJECTED CONDITIONSPROJECTED CONDITIONS
Transmission is adequate to meet Transmission is adequate to meet the forecasted peak load and the forecasted peak load and reservesreserves
SRP generation is ready and SRP generation is ready and purchases are adequate to meet the purchases are adequate to meet the forecasted year 2000 demandforecasted year 2000 demand
Emergency plans are in place to Emergency plans are in place to handle contingency eventshandle contingency events
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