Transcript Transmission Template

Entergy Texas, Inc.
Proposed Transmission
Reliability Projects
Entergy Transmission Planning Summit
New Orleans, LA
July 29, 2008
1
2008 ETI Completed Transmission Projects
Calvert 69kV Substation
•
•
•
Loss of 69kV Line 159 (Bryan – APL Hearne) caused undervoltages at Calvert
69kV Substation.
Expanded existing capacitor bank to 12 MVAr (Completed - January 2008)
Actual Cost: $58 K
2
2008 ETI Completed Transmission Projects
EGSI-TX Breaker Upgrades
•
•
Based on asymmetrical fault current analysis, various circuit breakers were
identified as underrated.
Replaced the identified underrated circuit breakers with appropriately sized
breakers.
o Cow 69kV #5515, #5510 (Completed - January 2008)
o Orange 69kV #3165, 3145 (Completed - July 2008)
•
Actual Cost: $750 K
3
2008-09 ETI Proposed Transmission Reliability
Projects
Re-tap Newton
Bulk CT
College Station Tap:
Close N.O. Switch
Newton
Bulk
College
Station
Replace Fawil
138/69 kV
Autotransformer
Fawil
Tamina
Helbig
Orange
S. Beaumont,
Dupont & Pt.
Neches
Porter-Tamina:
Replace
Breaker/Switches
EGSI-TX
Underrated Breaker
Replacement
4
Blue
Water
69kV Beaumont
Upgrades
Yankee Doodle,
69kV Line 876 &
Line 98
69kV Blue Water
Add Cap Bank
Fawil: Replace 138/69 kV Autotransformer
Scenario:
• Contingency events along 69 kV Line 81 (Fawil-Deweyville-Echo) cause loads
on Line 81 to be served radially through the Fawil 138/69 kV autotransformer,
resulting in overloads on the transformer during peak load conditions. The
transformer is currently rated at 20 MVA.
Recommended Solution:
• Replace the autotransformer with a system spare 138/69 kV, 45 MVA unit,
located at Meaux substation in Louisiana.
• Perform necessary reconfiguration/relay work to ensure reliable operation
• Proposed In-Service Date: December 2008
Estimated Cost: $1 MM
5
Fawil: Replace 138/69 kV Autotransformer
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Newton Bulk: Re-tap CT
Scenario:
• The single contingency outage of the Cypress-Hartburg 500 kV line causes an
overload of the Newton Bulk-Holly Springs 138 kV line. The rating of this line
is limited to 143 MVA by a CT ratio at Newton Bulk.
Recommended Solution:
• Re-tap the CT at Newton Bulk to achieve a rating of 280 MVA on the line
• Proposed In-Service Date: December 2008
Estimated Cost: $100 K
7
Newton Bulk: Re-tap CT
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EGSI-TX Breaker Upgrades
Scenario:
• Based on asymmetrical fault current analysis, various circuit breakers have
been identified as underrated.
Recommended Solution:
• Replace the identified underrated circuit breakers with appropriately sized
breakers.
– 2008
o Orange 69kV #3365
o South Beaumont 69kV #3700
o Port Neches 138kV #3345
– 2009
o Dupont Bulk 69kV #3255, #3260
o Helbig 69kV #5585
o Orange 69kV #3370
o Estimated cost: $1.8 MM
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Blue Water: Install Capacitor Bank
Scenario:
• Multiple contingencies cause undervoltages on 69kV Line 175 “Beach Line.”
Recommended Solution:
• Install 11MVAr capacitor bank at Blue Water 69kV
• Proposed In-Service Date: March 2009
Estimated Cost: $800 K
10
Blue Water: Install Capacitor Bank
INSTALL
11MVAR
CAP BANK
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College Station Tap: Close N.O. Switch
Scenario:
• The single contingency outage of the Grimes-Navasota 138kV line causes
overloads along the Lewis Creek-Longmire 138kV line, as well as undervoltages
along the Navasota-Longmire 138kV line.
Recommended Solution:
• Close the normally-open switch between Speedway 138kV and the College
Station 138kV tap to bring another path from Grimes into Navasota
• Proposed In-Service Date: May 2009
Estimated Cost: $3 MM
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College Station Tap: Close N.O. Switch
COLLEGE
STATION TAP
N.O.
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69 kV Beaumont Network Upgrades
Scenario:
• In the 69kV Beaumont area there exists several single contingency thermal
overloads including:
o
o
o
o
69kV Line 581 (Helbig – Rosedale)
69kV Line 468 (Elizabeth – Gallier)
230/69kV Helbig Autotransformers
69kV Bus Tie Breakers (Helbig & Amelia)
Recommended Solution:
• Add line breakers at Yankee Doodle 69kV Substation.
• Close normally open points at Lincoln and Crockett 69kV Substations.
• Rebuild 69kV Line 576 (Lincoln – South Beaumont) & 69kV Line 98/190
(Dupont Beaumont – South Beaumont) to 106MVA capacity.
o Approximately 5.5 miles of 69kV transmission lines
o Proposed In-Service Date: August 2009
Estimated Cost: $8 MM
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69 kV Beaumont Network Upgrades
CROCKETT
YANKEE
DOODLE
CLOSE N.O.
SWITCH
L-155
CLOSE N.O.
BREAKER
VIRGINIA
LINCOLN
L-458
CARDINAL
ADD LINE
BREAKERS
UPGRADE
LINE 576
L-458
LAMAR
CDT
NITRO
UPGRADE
LINE 190
DUPONT BEAUMONT
SOUTH BEAUMONT
BULK
UPGRADE
LINE 98
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Porter-Tamina: Replace Breaker/Switches
Scenario:
• 138 kV Line 823/886 (Porter – Tamina - Cedar Hill) is one of the primary
sources into the Montgomery County load pocket.
• The single contingency loss of 138 kV Line 582 (Oak Ridge - Porter) causes
thermal overloads on 138 kV Line 823 (Porter to Tamina).
Recommended Solution:
• Upgrade station equipment at Tamina, including a breaker and several
switches, to bring rating of Line 823 Porter-Tamina up to 478 MVA capacity.
• Proposed In-Service Date: 2009
Estimated Cost: $2 MM
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Porter-Tamina: Replace Breaker/Switches
UPGRADE TO
478 MVA
CAPACITY BY
REPLACING
TAMINA
EQUIPMENT
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2010-11 ETI Proposed Transmission
Reliability Projects
Western Region
Reliability Improvement
Plan - Phase 3 Interim
Lewis
Creek
Hartburg
Alden
Cedar
Hill
Jacinto
Tamina
Fontenot’s
Corner
Tamina – Cedar
Hill 138kV Reconductor
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South
Beaumont
Hartburg – Inland
Orange 230kV Line
Upgrade
Inland
Orange
Tamina – Cedar Hill 138kV Reconductor
Scenario:
• 138 kV Line 823/886 (Porter – Tamina - Cedar Hill) is one of the primary
sources into the Montgomery County load pocket.
• The single contingency loss of 138 kV Line 582 (Oak Ridge - Porter) causes
thermal overloads on 138 kV Line 886 (Tamina - Cedar Hill).
Recommended Solution:
• Re-conductor approximately 6 miles of 138kV Line 886 (Tamina – Cedar Hill)
to 478 MVA capacity.
• Proposed In-Service Date: 2011
Estimated Cost: $8.5 MM
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Tamina – Cedar Hill 138kV Reconductor
UPGRADE TO
531MVA
CAPACITY
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Hartburg-Inland Orange 230 kV Line Upgrade
Scenario:
• 230 kV Line 195 (Hartburg – Inland Orange) is one of the primary sources
into the Beaumont/Port Arthur area.
• The single contingency loss of 500 kV Line 547 (Cypress – Hartburg) causes
thermal overloads on Line 195.
Recommended Solution:
• Re-conductor approximately 4 miles of 230kV Line 195 (Hartburg – Inland
Orange) to 1042 MVA capacity.
• Projected In-Service Date: 2010
Estimated Cost: $4 MM
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230 kV Line 195 (Hartburg-Inland Orange)
Upgrade
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Western Region Reliability Improvement Plan
Phase 3 Interim
Scenario:
• Load growth within the Western Region load pocket is such that transmission
improvements are necessary to reliably serve the area under an N-1, G-1
contingency criteria
Recommended Solution:
•
•
•
•
•
•
Convert 138 kV Lines 524/824 (Jacinto-Lewis Creek) to 230 kV operation [~30 miles]
Convert Peach Creek Substation (ETEC-owned) from 138 kV to 230 kV Operation
Relocate Caney Creek load delivery point (ETEC-owned) to new location on 138 kV Line
587 (Lewis Creek – Conroe)
Install 230 kV Substation at Lewis Creek including 230/138 kV autotransformer
Reconductor Line 88/66 from Fontenot’s Corner to South Beaumont 138 kV station [~9
miles]
Install 200 MVAr SVC at Alden 138 kV substation in The Woodlands
Estimated Cost: $98 MM
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Western Region Reliability Improvement Plan
Phase 3 Interim
Convert Line
524/824
Upgrade Line
88/66
200 MVAr SVC at
Alden 138 kV
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2012-13 ETI Proposed Transmission
Reliability Projects
Reconductor
Jasper – Rayburn
138 kV Line
Sam
Rayburn
Dam
Jasper
Cypress
Jacinto
Amelia
China
Western Region
Reliability Improvement
Plan - Phase 3 Final
New China – Amelia
230 kV Line
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Western Region
Reliability Improvement Plan
Phase 3 Final
Scenario:
•
Load growth within the Western Region load pocket is such that transmission
improvements are necessary to reliably serve the area under an N-1, G-1
contingency criteria
Recommended Solution:
•
•
Construct a 230 kV transmission line from Cypress to Jacinto, with series
compensation
Projected In-Service Date: 2012
Estimated Cost: $116 MM
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Western Region
Reliability Improvement Plan
Phase 3 Final
Construct New
Cypress - Jacinto
230 kV Line
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Western Region
Reliability Improvement Plan
Phase 3 Alternative
Scenario:
• If the decision is made by the PUCT that ETI will move to the ERCOT retail
open access (ROA) market, the WRRIP Phase 3 Final project will not be
sufficient to address the load growth in the Western Region
Recommended Solution:
• Reconductor Grimes-Huntsville 138 kV line
• Build new Quarry 345 kV switching station
• Build new Quarry-Rivtrin 345 kV line
• Build new Grimes-Frontier 345 kV line
• This solution would also require additional firm resources
• Projected In-Service Date: 2012
Estimated Cost: $100 MM
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Western Region
Reliability Improvement Plan
Phase 3 Alternative
QUARRY
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•
WRRIP Phase 3 Final will result in
strengthening of and greater
reliance on the transmission
corridor between the Western
Region and the Beaumont area.
•
If the decision is made to move
ETI to the ERCOT ROA market,
Phase 3 Alternative would be
implemented, which would
strengthen the Western Region’s
ties to the west.
•
This solution would also require
additional firm resources
Reconductor Jasper-Rayburn
138 kV Line
Scenario:
• The single contingency outage of the Cypress-Hartburg 500 kV line
causes an overload of the Jasper-Rayburn 138 kV line
Recommended Solution:
• Reconductor the Jasper-Rayburn 138 kV line to achieve a rating of 265
MVA
• Proposed In-Service Date: 2012
Estimated Cost: $13 MM
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Reconductor Jasper-Rayburn
138 kV Line
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New China-Amelia 230 kV Line
Scenario:
• The single contingency outage of the China-Amelia 230 kV line causes
an overload of the China-Sabine 230 kV line
Recommended Solution:
• Construct a new 230 kV line from China to Amelia
• Proposed In-Service Date: 2013
Estimated Cost: $23 MM
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New China-Amelia 230 kV Line
AMELIA
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Identified Target Areas 2012 and Beyond
230 kV Line
195 (Helbig –
Inland Orange)
138 kV Line
150 (Dayton –
New Long
John)
230 kV Lines
515 & 516
(Sabine – Port
Neches)
138 kV Line 86
(Dayton Eastgate)
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Identified Target Areas 2012 and Beyond
138 kV Line 96
(Navasota –
Longmire)
Cleveland 138
kV Substation
New Caney
138 kV
Substation
138 kV Line
886 (Conroe –
Cedar Hill)
138 kV Line
571 (Jacinto –
Porter)
138 kV Line
582 (Porter –
Oak Ridge)
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Identified Target Areas 2012 and Beyond
138 kV Line 97
(Fork Creek –
Rayburn)
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