economic transmission projects
DESCRIPTION
Economic Transmission Projects. George Bartlett Director, Transmission Operations. Entergy Transmission Planning Summit New Orleans, LA July 8, 2004. Topics. Issues & Challenges in Transmission Planning Internal Studies Performed to Date Proposed Future Plan. - PowerPoint PPT PresentationTRANSCRIPT
George BartlettDirector, Transmission Operations
Economic Transmission ProjectsEconomic Transmission Projects
Entergy Transmission Planning Summit
New Orleans, LA
July 8, 2004
22
TopicsTopics
Issues & Challenges in Transmission Planning Internal Studies Performed to DateProposed Future Plan
33
Merchant Generation in Entergy Area by State
State MW # of IOAsAR 7,790 7MS 6,328 10LA 8,190 17TX 2,975 6TOTAL 25,283 40
Merchant generating facilities with filed IOAs
Merchant generating facilities that have filed IOAs and completed construction (19,000 MW)
44
Energy Mix for Entergy for 2003Energy Mix for Entergy for 2003
Source: GOL/AFC/WPP Technical Conference presentations (http://www.entergy.com/transmission)
Issue
55
Composition of Purchases for 2003Composition of Purchases for 2003
Not reflected in long-term planning model
Source: GOL/AFC/WPP Technical Conference presentations (http://www.entergy.com/transmission)
66
Composition of Short-Term PurchasesComposition of Short-Term Purchases
Source: GOL/AFC/WPP Technical Conference presentations (http://www.entergy.com/transmission)
Reflected only in short-termmonthly operations model
77
Summary of Issues in Entergy SystemSummary of Issues in Entergy System
Generation to load ratio will be ~2:1 by 2005.Uncertainty in planning for future system due to short-term purchases.Loop flow due to various tie lines.Incentive to invest in bulk transmission system
88
Internal Studies Performed to DateInternal Studies Performed to Date
Bulk Power Study (2002) Identified transmission projects to accommodate point to
point transmission requests on Entergy system. Ten projects, including at least 800 miles of 500 kV lines
and three autotransformers, are required to move ~9,300 MW to Entergy’s border and to embedded load.
Total transmission expansion cost is ~$1.9 Billion (i.e., $205/kW)
LPSC Phase II Transmission Study (2003)
LPSC Phase II Transmission Study:LPSC Phase II Transmission Study:A cost-benefit analysis verified the effectiveness A cost-benefit analysis verified the effectiveness
of transmission expansion alternativesof transmission expansion alternatives
• Examined transmission expansion alternatives
• Aimed at alleviating internal and external interface limitations
• Considered 13,800 MW of merchant capacity available by summer 2004 along with Entergy owned units to serve native load
• 81 potential constraints identified for 2003-2012 simulation period in PROMOD
Generation LocationsGeneration Locations
Occidental Taft
Waterford (ELA)
CarvilleShell Geismar
Exxon Baton RougeBig Cajun I Expansion
Hinds Energy Facility
Attala
Choctaw
AEP/Dow Chemical
Evangeline Project
Cottonwood
AcadiaPPG Riverside
Ouchita Power
Sterlington Power
Perryville
Panda Union
Hempstead County Batesville Expansion
Southhaven
Southaven GT
Crossroads
ANO Uprate
AREC Coop
Pine Bluff
Little RockHot Springs
Hot Springs County
Tenaska Frontier
Sabine River
Beaumont
Port Arthur Sabine Bayer-Cogen
Calcasieu
Warren Power Project
Transmission Area Amite South
Bayou Cove
Smith County
Silver Creek
BASF
Central North Arkansas WOTAB
1111
Oklahoma
Texas
Louisiana
Arkansas
Mississippi Alabama
TennesseeNORTH ARKANSAS
CENTRAL
WOTAB
AMITE SOUTH
East/Northeast
Import
Northeast AR Area Import intoImport into
Entergy from Entergy from Southern/TVASouthern/TVA
WesternImport
Import intoImport intoEntergy Entergy from SPPfrom SPP
Amite SouthImport
33 22
44
11
LPSC Phase II Transmission Study:LPSC Phase II Transmission Study:Top Four Areas for Potential BenefitsTop Four Areas for Potential Benefits
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LPSC Phase II Transmission Study:LPSC Phase II Transmission Study:Transmission ProjectsTransmission Projects
No Examined Transmission Projects State Expected Benefit (Location)
1 Construct new line from Panama to Dutch Bayou
LA
Improve Amite-South interface.(Between Baton Rouge and New Orleans
within the Company’s industrial corridor)2 Rebuild 230 kV line from Coly to
VignesLA
3 Rebuild 230 kV line from Conway to Bagatelle
LA
4 500/230 kV autotransformer at McAdams
MS Relieve congestion in Entergy’s central region. (Near Entergy-TVA border in central Mississippi near of Jackson)
5 Rebuild 115 kV line from Couch to McNeil
AR Relieve identified constraint.(Near Arkansas-Louisiana border)
6 Upgrade 230 kV line from PPG to Rose Bluff
LA Relieve identified constraint.(Near Louisiana-Texas border in Lake Charles area)
7 500/115 kV autotransformer at Sterlington
LA Improve North-South Interface(North Louisiana near city of Monroe)
Detail Set A
Detail Set B
Detail Set C
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Set A Projects: Amite SouthSet A Projects: Amite SouthConstruct a new 230 kV line from Panama to Dutch BayouRebuild 230 kV line from Coly to Vignes Rebuild 230 kV line from Conway to Bagatelle
Estimated project cost: $45 million<< Back
1414
Set B Projects: East AreaSet B Projects: East Area
Set A Projects, Plus:McAdams autotransformer to improve Entergy’s import capability from the east
Estimated project cost: $53 million total<< Back
1515
Set C Projects: MiscellaneousSet C Projects: Miscellaneous
Set A and Set B Projects, Plus:Rebuild 115 kV line from Couch to McNeilUpgrade 230 kV line from PPG to Rose Bluff500/115 kV autotransformer at Sterlington
Estimated project cost: $78 million total
1616
Cost/Benefit Study ResultsCost/Benefit Study Results
CaseCase20 Year NPV of 20 Year NPV of Savings ($MM)Savings ($MM)
Set A Set A
Set BSet B
Set CSet C
$260.5$127.6
Upper Bound Lower
Bound
$170.6
$147.2
$310.9
$290.3
UpperUpper andand LowerLower BoundsBounds
• Upper Bound Assumes
• Increases in transfer capability constant throughout study• No additional transmission expansion projects
• Lower Bound Assumes• Transfer capabilities reduced throughout study period• No additional transmission expansion projects
Limitation of LPSC Phase II StudyLimitation of LPSC Phase II Study
• Could not examine voltage constraints
• PROMOD IV output based on DC solution methodology
• Unable to monitor all transmission constraints
• Footprint of the detailed model is limited to Entergy only• Changes in external system dispatch that may impact
various internal constraints were not considered
• Must-run unit requirements and import/export limits could not be changed dynamically based on the system condition in PROMOD IV
Summary of LPSC Phase II StudySummary of LPSC Phase II Study
• North Arkansas area constraint• City of Jonesboro committed to fund third line (ISES-Newport)• In Service Date: By Summer 2005
• Import from Western area• OG&E committed to install a 500/161 kV auto at Ft. Smith• In Service Date: By December 2004
• Company committed to proceed with the projects identified in Set A(Amite South improvement plan)
• At present, projects are in scoping/engineering phase • Projected In Service Date: Summer 2007
• Projects in Sets B and C to be reviewed through planning process• Company identified Sterlington 500/115 kV auto as RMR issue and
committed to install additional auto by year end 2005.
2020
Proposed Future PlanProposed Future PlanReliability planning
Continue to determine reliability projects based on traditional planning models and software (PSS/E, MUST)
Verify the need of those proposed reliability projects that might be impacted by a change in unit commitment by looking at market-based dispatch.
Use indicators like congestion hours, production cost or load payment to compare/prioritize proposed projects.
Prioritize those projects that have both reliability and economic impact.
2121
Proposed Future Plan (Cont.)Proposed Future Plan (Cont.)Economic Planning
Identify potential bottlenecks on the system using historical operational constraints (TLRs, flowgates, etc.)
Determine cost-effective solutions that would increase the transmission throughput
Coordinate this effort with neighboring utilities to address any seams issues.
Encourage participant funding for the market-driven economic projects
Questions?Questions?