Entergy Louisiana, Inc' South Proposed Transmission Reliability Projects

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Entergy Louisiana, Inc.(South)Proposed
TransmissionReliability Projects

• Entergy Transmission Planning Summit
• New Orleans, LA
• July 10, 2003

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2004 ELI-South Transmission Reliability Projects
Bogue Chitto Build 500kV SS, tap
Daniel-McKnight to Bogalusa (2006 ISD)
Amite-Fernwood Upgrade line
(2006 ISD)
Coly-Hammond Build 230kV line (2006 ISD)
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Amite South Area
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2003-05
ASI Improvement PlanBuild Panama Switching
Station Conway-Panama 230kV Line

• The Amite South Import (ASI) has typically been
  approximately 2,100 MW during the summer
  operating season. When generation in the Amite
  South area is low, the WaterfordWillow Glen 500
  kV line is usually the most severe contingency,
  thereby defining the ASI. The import calculation
  incorporates multiple operating guides, one of
  which assumes a potential increase (using Dynamic
  Line Rating (DLR) equipment) in the rating of the
  ConwayBagatelle 230 kV line, under favorable
  system and weather conditions. Recent studies
  have shown that the ConwayBagatelle line is the
  most limiting transmission line that establishes
  the ASI capability. The potential benefit from
  the use of DLR equipment on this line is no
  longer adequate to maintain ASI capability at
  appropriate levels.
• Recommended Solution Build a new circuit from
  Conway to a new 230kV switching station (Panama)
  near Sunshine Substation. This circuit will be
  approximately 10 miles long and should be
  constructed using 1,780MCM ACSR conductor (1,605
  Amps). The Panama switching station and a new
  line bay at Conway will have to be constructed.
• Estimated Total Cost 13.4M (1.59M for EGSI in
  2004)
• (8.66M for ELI in 2004)

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Panama
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Bogalusa-Daniel-McKnightBuild Bogue Chitto
Switching Station 500kV Line
2003-06

• Power transfers from the Entergy system are
  limited by the flow on the Franklin to McKnight
  500kV line flowgate. Loss of this line causes
  the underlying transmission system, particularly
  the Little Gypsy to Madisonville 230kV line, to
  become overloaded.
• Recommended Solution Build a 500kV switching
  station on the Daniel-McKnight 500kV line south
  of Bogalusa. Build two circuits of approximately
  11 miles each to a point on the Bogalusa-
  Franklin 500kV line. Reconnect the system with
  the following arrangement
• Bogue Chitto - Daniel
• Bogue Chitto - McKnight
• Bogue Chitto - Bogalusa
• Bogue Chitto - Franklin
• This arrangement redirects approximately 620MW
  of flow off of Franklin- McKnight, which in turn
  lowers the post-contingency flow on Gypsy -
  Madisonville by approximately 200MW.
• Estimated Cost 50.5M (400,000 in 2003 for
  engineering expenditures)
• (6.23M 2004 for ROW)

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Coly-HammondBuild 230kV Line
2003-06

• Entergys transmission system north of Lake
  Pontchartrain is primarily supported from the ELI
  230kV system between Willow Glen and Waterford.
  Loss of the Franklin-McKnight 500kV line causes
  overloads 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 Build a 230kV line,
  approximately 24 miles, from Coly to Hammond.
• NOTE This line cannot be connected until the
  Amite - Fernwood overload condition is resolved
  and until the Hammond-Amite line is converted.
• Estimated Cost 19M
• 400,000 in 2003 for engineering expenditures
• 2.1M ELI, 2.5M EGSI in 2004

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COLY
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Amite(ELI)-Fernwood(EMI) LineUpgrade 115kV Line
2004-06

• The Amite to Fernwood 115kV line, located in
  south Louisiana, north of Lake Pontchartrain,
  extending north into southern Mississippi is 32
  miles long. The section of line from Amite
  Substation to the Mississippi state line is
  approximately 17 miles and the section from the
  state line to Fernwood Substation is
  approximately 15 miles. This 115kV line,
  constructed with 4/0 ACSR conductor, is part of
  the Amite to McComb tie between ELI and EMI.
• Single contingencies in Mississippi of
  Brookhaven-Mallalieu or Mallalieu-Norfield in
  2004 will cause overloads up to 27 on the
  Amite-Kentwood-Colonial Pipeline-Fernwood line
  segments.
• Recommended Solution Rebuild the line with
  1,272MCM ACSR conductor to obtain a line rating
  of 261 MVA.
• NOTE This project needs to be in place prior to
  the Hammond-Amite conversion and the Coly-Hammond
  230kV line.
• Estimated Total Cost 15M for ELI EMI
• 7.7M for ELI (3.88M in 2004)

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Hammond-Independence-Amite 115kVConvert to 230kV
2005-06

• The Hammond-Independence-Amite 115kV line, which
  is constructed for 230kV and operated at 115kV,
  is limited by the Hammond 230/115kV, 168MVA
  autotransformer and an 800Amp circuit breaker at
  Amite . This circuit overloads by 22 for a
  single contingency loss of Franklin-McKnight
  500kV and by 18 for the loss of
  Bogalusa-Franklin 115kV line in 2004.
• Recommended Solution Convert the
  Hammond-Independence-Amite 115kV line and the
  Independence 115kV substation to 230kV operation.
  Install a 230/115kV, 400MVA autotransformer at
  Amite and remove the autotransformer at Hammond.
• Estimated Cost 7.4M (150,000 in 2004)

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2004
Ninemile 230kV Replace Circuit Breakers

• Mandatory Safety - Replace 4 - 230 kV circuit
  breakers at
• Ninemile Substation
• Total Cost 2004 - 1.55 M

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Houma 115kV Install 3 Breakers
2004-05

• Houma Substation presently has a single 115 kV
  operating bus with no 115KV breakers. There has
  been frequent outages on the Chauvin Houma
  Ashland Coteau 115kV line and the Houma City
  of Houma 115KV line, causing this circuit to be
  one of ELIs poorest performing lines.
• Recommended Solution Install 3-115 kV breakers
  along with associated bus and switches at the
  Houma Substation.
• NOTE Entergy has obtained a signed contract with
  City of Houma to pay 1/3 of the total project
  cost.
• Estimated Cost 1.22M for ELI (610,000 in
  2004)
• 610,000 for City of Houma

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2004-06
ASI Improvement Plan - Phase IIBuild Panama
-Frisco 230kV Line

• The Amite South Import (ASI) has typically been
  approximately 2,100 MW during the summer
  operating season. When generation in the Amite
  South area is low, the WaterfordWillow Glen 500
  kV line is usually the most severe contingency,
  thereby defining the ASI. The import calculation
  incorporates multiple operating guides, one of
  which assumes a potential increase (using Dynamic
  Line Rating (DLR) equipment) in the rating of the
  ConwayBagatelle 230 kV line, under favorable
  system and weather conditions. Recent studies
  have shown that the ConwayBagatelle line is the
  most limiting transmission line that establishes
  the ASI capability. The potential benefit from
  the use of DLR equipment on this line is no
  longer adequate to maintain ASI capability at
  appropriate levels.
• Recommended Solution Build a new 230kV circuit
  from Panama to Frisco This circuit will be
  approximately 20 miles long and should be
  constructed using 1,780MCM ACSR conductor (1,605
  Amps). The ring bus at Panama switching station
  will have to be completed and a new line bay at
  Frisco will have to be constructed.
• Estimated Total Cost 14M (1.5M 2004 for ROW)

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Panama
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2005 - 2007 ELI-South Transmission Reliability
Projects
Bogue Chitto Build 500kV SS, tap
Daniel-McKnight to Bogalusa Carryover (2006 ISD)
Coly-Hammond Build 230kV line Carryover (2006
ISD)
Hammond-Amite Convert to 230kV Carryover (2006
ISD)
Houma Install 115kV Breakers Carryover (2006
ISD)
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2008 ELI Transmission Reliability Target Areas
Belle Chasse-Alliance Build Switching Station
115kV Line
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• Questions