Entergy Louisiana, LLC (South) &
Entergy New Orleans, Inc.
Proposed Transmission
Reliability Projects
Entergy Transmission Planning Summit
New Orleans, LA
July 29, 2008
1
ELL-South/ENOI
Transmission Reliability Projects
Loblolly-Hammond:
Build 230kV line
DSG: Phase III (Postponed)
Paterson:
• Restore 4 breakers
SELA Phase #3
Oakville-Alliance:
Build 230kV line & Auto
Improve ASI Capability:
Phase II- Panama-Dutch Bayou
Phase III- Coly-Vignes
Conway-Bagatelle
Houma:
Install Cap Bank
SELA Phase #2
Peters Rd-Oakville :
Build 230kV line & Station
2
ELL-South
Paterson:
Restore 4 Breakers
Scenario:
•
•
Paterson substation was flooded during Hurricane Katrina resulting in all major transmission
equipment being damaged. Prior to Katrina, Paterson 115kV bus terminated four 115kv
transmission lines and operated as a hub for the transmission system in the New Orleans area.
Presently, the Paterson 115kV bus has been temporarily restored to operate in a split, east / west
bus configuration. The east bus is in series with the Chalmette 115kV and the Sherwood Forest
115kV substations.
The west bus is in series with the Claiborne 115kV and the Pontchartrain Park 115kV substations.
Various single contingencies in the New Orleans area now could result in overloads on portions of
this west bus circuit.
Recommended Solution:
•
•
Re-build the Paterson 115kV substation to terminate four 115kV transmission lines from
Pontchartrain Park, Sherwood Forest, Chalmette and Claiborne. The bus configuration should be
configured in a double bus with shared breaker configuration (breaker and a 1/2). This
arrangement will allow for station expansion, including power transformer additions and
potentially the addition of a 230/115kV auto transformer as system conditions dictate.
Proposed In-Service Date: 2008
•
Estimated Cost: $3 MM
3
ENOI
Paterson: Restore 4 Circuit Breakers
Restore
Breakers
4
Houma:
Install Capacitor Bank
Scenario:
• This project was identified as required as part of a transmission service request
Recommended Solution:
• Install a 40MVAr capacitor bank at Houma 115kV substation.
• Proposed In-Service Date: 2008
Estimated Cost: $850 k
5
ELL-South
Houma:
Install Capacitor Bank
Install
Cap Bank
6
Loblolly-Hammond:
Construct 230 kV Substation and Line
Scenario:
•
Entergy’s transmission system north of Lake Pontchartrain is primarily supported from
the ELL 230kV system between Willow Glen and Waterford.
– Loss of the Franklin-McKnight 500kV line, or certain other transmission
contingencies, result in overloads to occur on the underlying transmission system,
primarily on the Gypsy-Madisonville 230kV line.
– Adding another 230kV source from a location north of Willow Glen reduces loading
on the existing system and improves load serving capability north of Lake
Pontchartrain and into south Mississippi.
Recommended Solution:
•
•
Construct 230 kV line from Loblolly to Hammond using existing Coly–Hammond 69 kV
line (constructed for 230kV).
Proposed In-Service Date: 2012
Estimated Cost: $75 MM
7
ELL-South
Loblolly-Hammond: Build 230 kV Line
To
Franklin
To Fancy
Point
McKnight
To SOCO’s
Plant Daniel
To Coly
Construct new
230kV line
Coly
Loblolly
8
ELL-South / EGSI-LA
ASI Improvement Plan - Phases 2 & 3
Scenario:
• When generation in the Amite South area is low, loss of the Waterford–Willow Glen 500
kV line is the most severe contingency that establishes the Amite South Import (ASI)
capability.
• The ASI capability improved to approximately 2,450 MW upon completion of Phase 1 of
the ASI Improvement Plan (Conway-Panama) in 2005.
• Phase 2 (Panama-Dutch Bayou) and Phase 3 (Coly-Vignes, Conway-Bagatelle) were
expected to provide economic benefits and were to be completed by 2007 prior to
Hurricane Katrina.
• Post Hurricane Katrina and the subsequent loss of load within southeast LA, Phases 2
and 3 were determined to be needed for reliability by 2015 or by 2010 for economics.
• Based on the 2006 Transmission Study, Entergy determined that accelerating Phases 2
& 3 could yield economic benefits sufficient enough to advance the in-service dates to
earlier than 2010.
Recommended Solution:
• Construction of Phases 2 & 3.
• Proposed In-Service Date: 2009 (Phases 2 & 3)
Estimated Project Costs:
• Phase 2: $38 MM
• Phase 3: $20 MM
9
ELL-South / EGSI-LA
ASI Improvement Plan - Phase 2
Build
230kV line
Panama
10
ELL-South
Coly
Vignes
ASI Improvement Plan - Phase 3
Upgrade
230kV line
Upgrade
230kV line
Panama
11
ELL-South / EGSI-LA
Southeast Louisiana Coastal Improvement Plan:
Construct New Peters Road-Oakville-Alliance 230 kV Line
Scenario:
• The primary transmission sources to lower Lafourche, Lower Jefferson, and Plaquemines
Parishes are the Ninemile and Valentine substations. Although lower Plaquemines Parish
experienced heavy damage during Hurricane Katrina, it is expected that oil refining and
pumping facilities in the area will be restored.
• Additionally, upper Plaquemines Parish, including Belle Chasse and the Naval Air Support
facility, is experiencing growth.
• For the contingency loss of the Ninemile-Barataria 115kV or the Valentine-Clovelly
115kV lines, potential low voltages and line overloads exists.
Recommended Solution:
• Peters Road-Oakville 230kV
–
–
–
•
Build a new 230kV substation at Oakville and a new radial 230kV line from Peters Road to
Oakville Substation.
Proposed In-Service Date: 2010
Estimated Cost: $21.3 MM
Oakville-Alliance 230 kV
–
–
–
Construct a new 230kV transmission line from Oakville substation to Alliance substation. Add a
150MVA 230/115kV auto at Alliance substation. This project also provides support for the
Fourchon area.
Proposed In-Service Date: 2010
Estimated Cost: $35 MM
12
ELL-South
Peters Road-Oakville 230kV: Build new line and substation
Oakville-Alliance 230 kV: Build new line
Build 230kV
Line & Sub
Peters Rd.
Build 230kV
230kV
LineBuild
& Auto
Line & Auto
Oakville
13
ELL-South
ELL-South and ENOI Identified Target Areas
Beyond 2011
Paterson:
Install 230/115kV auto
Belle Point – Little Gypsy:
Reconductor 230kV Line
DSG: Phase III
Napoleonville – Add capacitor bank
14