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Entergy Texas, Inc.
Proposed Transmission Reliability Projects
Entergy Transmission Planning Summit
New Orleans, LA
July 29, 2008
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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
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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
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2008-09 ETI Proposed Transmission Reliability Projects
69kV Blue WaterAdd Cap Bank
Blue Water
Replace Fawil 138/69 kV
Autotransformer
Fawil
EGSI-TX Underrated Breaker
Replacement
HelbigOrange
S. Beaumont, Dupont & Pt.
Neches
Newton Bulk
Re-tap Newton Bulk CT
College Station
Tamina
Porter-Tamina:Replace
Breaker/Switches
College Station Tap: Close N.O. Switch
69kV Beaumont Upgrades
Yankee Doodle, 69kV Line 876 &
Line 98
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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
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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
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EGSI-TX Breaker UpgradesScenario:• 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 #3365o South Beaumont 69kV #3700o Port Neches 138kV #3345
– 2009o Dupont Bulk 69kV #3255, #3260o Helbig 69kV #5585o 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
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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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69 kV Beaumont Network Upgrades
Scenario:• In the 69kV Beaumont area there exists several single contingency
thermal overloads including:o 69kV Line 581 (Helbig – Rosedale)o 69kV Line 468 (Elizabeth – Gallier)o 230/69kV Helbig Autotransformerso 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
CARDINAL
LAMAR
SOUTH BEAUMONTBULK
VIRGINIALINCOLN
YANKEEDOODLE
CROCKETT
DUPONT BEAUMONT
NITROCDT
L-458
L-458
L-1
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UPGRADE LINE 576
UPGRADE LINE 576
UPGRADE LINE 190
UPGRADE LINE 190
UPGRADE LINE 98
UPGRADE LINE 98
CLOSE N.O.
SWITCH
CLOSE N.O.
SWITCH
CLOSE N.O.
BREAKER
CLOSE N.O.
BREAKER
ADD LINE BREAKERS
ADD LINE BREAKERS
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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
UPGRADE TO 478 MVA
CAPACITY BY REPLACING
TAMINA EQUIPMENT
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2010-11 ETI Proposed TransmissionReliability Projects
Tamina
Tamina – CedarHill 138kV Reconductor
Cedar Hill
Inland Orange
Hartburg
Hartburg – Inland Orange 230kV Line
Upgrade
Western Region Reliability Improvement Plan - Phase 3 Interim
Jacinto
Lewis Creek
Alden
South Beaumont
Fontenot’s Corner
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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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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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Western Region Reliability Improvement PlanPhase 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
200 MVAr SVC at Alden 138 kV
200 MVAr SVC at Alden 138 kV
Upgrade Line 88/66
Upgrade Line 88/66
Convert Line 524/824
Convert Line 524/824
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2012-13 ETI Proposed TransmissionReliability Projects
Cypress
Western Region Reliability Improvement
Plan - Phase 3 Final
Jacinto
Jasper
Sam Rayburn
Dam
China
Amelia
ReconductorJasper – Rayburn
138 kV Line
New China – Amelia230 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
Construct New Cypress - Jacinto
230 kV Line
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Western Region Reliability Improvement Plan
Phase 3 AlternativeScenario:• 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
• 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
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Reconductor Jasper-Rayburn138 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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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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138 kV Line 150 (Dayton – New Long
John)
138 kV Line 150 (Dayton – New Long
John)230 kV Lines 515 & 516
(Sabine – Port Neches)
230 kV Lines 515 & 516
(Sabine – Port Neches)
138 kV Line 86 (Dayton -
Eastgate)
138 kV Line 86 (Dayton -
Eastgate)
Identified Target Areas 2012 and Beyond
230 kV Line 195 (Helbig –
Inland Orange)
230 kV Line 195 (Helbig –
Inland Orange)
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138 kV Line 571 (Jacinto –
Porter)
138 kV Line 571 (Jacinto –
Porter)
138 kV Line 582 (Porter – Oak Ridge)
138 kV Line 582 (Porter – Oak Ridge)
New Caney 138 kV
Substation
New Caney 138 kV
Substation
Identified Target Areas 2012 and Beyond
Cleveland 138 kV
Substation
Cleveland 138 kV
Substation
138 kV Line 886 (Conroe – Cedar Hill)
138 kV Line 886 (Conroe – Cedar Hill)
138 kV Line 96 (Navasota – Longmire)
138 kV Line 96 (Navasota – Longmire)