Entergy Arkansas, Inc. Proposed Transmission Projects

1
Entergy Arkansas, Inc.Proposed
TransmissionProjects

• Entergy Transmission Planning Summit
• New Orleans, LA
• August 11, 2009

2
2009 EAI Transmission Projects
1) Gillette Install 10.8 MVAR Capacitor Bank 2)
Donaghey to Conway South Upgrade
Line 3) Hamlet Install Breaker on Conway
Industrial Line 4) Danville Upgrade Terminal
Equipment
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4
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2010-2012 EAI Transmission Projects
1
1) Osage Creek Grandview New Line 2)
Transmission Service - OGE 3) Holland Bottoms
Construct 500/161/115 kV Substation 4)
Transmission Service - Aquila 5) Warren East
Install 10.8 MVAR Capacitor Bank
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6
6) Transmission Service SMEPA 7) Melbourne to
Sage 161kV Upgrade Line
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3
4
5
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2010-2012 EAI Transmission Projects
1) Harrison to Everton Road Replace Switches and
Line Trap 2) Transmission Service Westar 3)
Jonesboro to Hergett Upgrade 161kV Line 4)
Ebony Switching Station Convert to a Breaker
Station 5) Beebe Install 21.6 MVAR Capacitor
Bank
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2
3
6) Holland Bottoms to Hamlet Construct New 161
kV Line 7) Benton North to Benton South
Construct New 115 kV Line 8) Mt Ida Install
10.8 MVAR Capacitor Bank 9) Sarepta Emerson
Install a 10.8 MVAR Capacitor Bank
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Gillette Install 10.8 MVAR Capacitor Bank

• Scenario
• Loss of the Helena Industrial - Ritchie SES 115
  kV line segment causes low voltages at various
  substations
• Loss of the Stuttgart Ricusky 230/115 kV
  autotransformer causes low voltages at various
  substations and overloads on the Woodward
  Altheimer and the Altheimer Wabbaseka 115 kV
  line segments
• Proposed Solution
• Install a 10.8 MVAR capacitor bank at Gillette.
• Correct Distribution power factor at Dewitt,
  Almyra, Marvell, Gillett, Helena Central, and Ulm
  substations.
• Proposed In Service Date Summer 2009

6
Gillette Install 10.8 MVAR Capacitor Bank
Gillette Install 10.8 MVAR Capacitor Bank
7
Donaghey to Conway South Upgrade Line Hamlet
Install Breaker on Conway Industrial Line

• Scenario
• Loss of the Helena Industrial - Ritchie SES 115
  kV line segment causes low voltages at various
  substations
• Loss of the Pleasant Hill - Quitman 161 kV line
  segment causes an overload on the Conway West to
  Donaghey and Donaghey to Conway South 161kV
  transmission line sections. The Conway West -
  Donaghey line has been upgraded.
• The Pleasant Hill Quitman line and the
  Morrilton East to Quitman line are subjected to
  unanticipated transactions which tend to overload
  the Morrilton East to Quitman line for the loss
  of the Pleasant Hill to Quitman line.
• Proposed Solution
• Re-conductor Donaghey Conway South
• Install a breaker at Hamlet Switching Station to
  remove the overloads caused by the loss of
  Pleasant Hill Quitman. This is an interim
  measure until a line can be constructed from
  Holland Bottoms to Hamlet in 2012.
• Proposed In Service Date Winter 2009

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Donaghey to Conway South Upgrade Line Hamlet
Install Breaker on Conway Industrial Line
Donaghey to Conway South Upgrade Line
Hamlet Install Breaker on Conway Industrial Line
9
Danville Upgrade Terminal Equipment

• Scenario
• Loss of ANO - Fort Smith 500kV Transmission line
  causes overloads on the Danville-Magazine, and
  Magazine-North Magazine line sections.
• The loss of the 500 kV line causes the flow to
  utilize the underlying network to transfer power
  to the neighboring utilities.
• Proposed Solution
• Upgrade Danville bus section, switches and line
  trap.
• Danville to North Magazine re-conductor. This has
  been completed.
• Proposed In Service Date Fall 2009

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Danville Upgrade Terminal Equipment
Danville Upgrade Substation Equipment
11
Osage Creek Grandview New Line

• Scenario
• By 2010 it is estimated that approximately 227 MW
  of load will be served between Harrison East and
  Eureka Springs.
• Loss of the Harrison East Harrison South
  transmission line segment causes thermal
  overloads by as much as 7 on the Eureka Osage
  Creek (AECC) line segment.
• Loss of this line also causes depressed voltage
  at key load centers.
• Proposed Solution
• Construct a new switching station, Grandview, on
  the transmission line from Table Rock Dam
  Eureka Springs. Build a new line between
  Grandview and Osage Creek.
• Proposed In Service Date 2011

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Osage Creek Grandview New Line
Grandview 161 kV Substation
Grandview Osage Creek 161 kV Line Construct
New Line
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Supplemental Upgrades - OGE

• Scenario
• Supplemental upgrades for OGE
• Proposed Solution
• ANO - Russellville N 161 kV Line Upgrade
• Russellville E - Russellville S 161 kV Line
  Upgrade
• ANO EHV Substation Upgrade Switch
• Russellville N 161 kV Substation Upgrade Switch
• Russellville E 161 kV Substation Upgrade Switch
• Russellville S 161 kV Substation Upgrade Switch
• Proposed In Service Date Winter 2010

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Supplemental Upgrades - OGE
Re-Conductor the 161 kV Transmission Line from
ANO to Russellville North
Re-Conductor the 161 kV Transmission Line from
Russellville East to Russellville South
15
Holland Bottoms Construct 500/161/115 kV
Substation

• Scenario
• For the past two summers, several stations in
  Little Rock observed voltages as low as 91 of
  nominal with no significant contingencies.
• The loss of one of the 500/115 kV transformers at
  Mabelvale in 2006 resulted in low voltages in the
  Little Rock area during periods where heavy flows
  to the north were occurring.
• A loss of the second transformer at Mabelvale
  (N-2) could result in widespread low voltage in
  the Little Rock area.
• Proposed Solution
• Construct a 500/115kV substation near Cabot
  Northeast of Little Rock. This will provide
  voltage support to Little Rock and reduce some
  thermal contingencies.
• Proposed In Service Date 2011

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Holland Bottoms Construct 500/161/115 kV
Substation
Holland Bottoms 500/161/115 kV Substation
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Transmission Service - Aquila

• Scenario
• Aquila Transmission Service (Base Funded)
• Proposed Solution
• Project definitions will be completed for the
  following Base Plan Projects
• Hot Springs EHV to Bismarck 161kV T-line
  upgrade
• Bismarck to AECC Alpine 161 kV T-line
  Upgrade
• AECC Alpine to Amity Tap 161 kV T-line
  Upgrade
• Bismarck Substation Upgrades
• Proposed In Service Date 2011

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Transmission Service - Aquila
Re-Conductor the 115 kV Transmission Line from
Bismarck to AECC Alpine
Re-Conductor the 115 kV Transmission Line from
Hot Springs EHV to Bismarck
Re-Conductor the 115 kV Transmission Line from
AECC Alpine to Amity SS
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Warren East Install 10.8 MVAR Capacitor Bank

• Scenario
• The Warren East is a substation which is located
  in southeastern Arkansas, northeast of El Dorado.
  This is a long radial line fed from Monticello
  East and El Dorado EHV which is approximately 61
  miles. Loss of any of the line segment along
  this line causes voltages to dip below 90.
  Also, voltages in this area drop during the loss
  of the 500/115 kV at El Dorado EHV.
• Proposed Solution
• Install a 10.8 MVAR capacitor bank to the
  operating bus at the Warren East substation.
• Proposed In Service Date 2012

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Warren East Install 10.8 MVAR Capacitor Bank
Warren East Install 10.8 MVAR Capacitor Bank
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Transmission Service - SMEPA

• Scenario
• SMEPA transmission service (Base Funded).
• Proposed Solution
• Upgrades required for transmission service
• Re-conductor Dell to AECC Manila 161 kV
  Transmission Line
• Re-conductor AECC Manila to Monette 161 kV
  Transmission Line
• Re-conductor Jonesboro North to Paragould South
  161 kV Transmission Line
• Re-Conductor Jonesboro to Jonesboro North 161 kV
  Transmission Line
• Proposed In Service Date Summer 2010

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Transmission Service - SMEPA
Re-Conductor the 161 kV Transmission Line from
Jonesboro North to Paragould South
Re-Conductor the 161 kV Transmission Line from
AECC Manila to Monette
Re-Conductor the 161 kV Transmission Line from
Jonesboro to Jonesboro North
Re-Conductor the 161 kV Transmission Line from
Dell to AECC Manila
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Melbourne to Sage 161kV Upgrade Line

• Scenario
• The following contingencies cause the Melbourne
  to Sage 161kV line segment to overload in the
  Winter 2010 Planning Models
• Loss of ANO to Fort Smith 500kV
• Loss of ISES to Dell 500kV
• Newport to Jonesboro 161kV
• Proposed Solution
• Re-conductor the Melbourne to Sage 161kV
  Transmission line segment to a minimum of 1200
  Amps.
• Proposed In Service Date Winter 2010

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Melbourne to Sage 161kV Upgrade Line
Re-Conductor the 161 kV Transmission Line from
Melbourne to Sage
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Harrison East to Everton RoadReplace Switches
and Line Trap

• Scenario
• Harrison East to Hilltop has a limited of 167 MVA
  due to breaker B4836 switches at Harrison East
  and the line trap at Harrison East. The switches
  are currently rated at 600 Amps and the line trap
  is rated for 600 Amps. BY upgrading the switches
  and line trap the line rating will increase from
  167 MVA to 223 MVA.
• Proposed Solution
• Install 2 sets of switches at Harrison East on
  breaker B4836. The new switches need to be rated
  no less than 1200 Amps.
• Install a new line trap at Harrison East with a
  rating no less than 1200 Amps.
• Proposed In Service Date 2011

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Harrison to Everton Road Replace Switches and
Line Trap
Harrison East Replace switches and line trap on
the Everton Road 161 kV Transmission Line
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Transmission Service - Westar

• Scenario
• Transmission Service
• Proposed Solution
• Re-conductor the Monette to Paragould 161 kV
  (Base Funding) Transmission line segment to at
  least 246 MVA.
• Upgrade the switch B6673 at Paragould substation
  from 600 A to 2000 A
• Russellville South 161 kV Substation Upgrade
  Dardanelle Dam Line Terminal Equipment
  (Supplemental Funding) Proposed upgrade to 416
  MVA rating
• Proposed In Service Date 2012

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Transmission Service - Westar
Re-Conductor the 161 kV Transmission Line from
Paragould to Monette
Upgrade Switch B6673
Re-Conductor the 161 kV Transmission Line from
Russellville South to Dardanelle Dam
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Jonesboro to Hergett Upgrade 161 kV Line

• Scenario
• The loss of Jonesboro to Jonesboro SPA causes the
  Jonesboro to Hergett 161 kV Transmission Line
  segment to overload. Also the loss of the Marked
  Tree to Harrisburg Tap 161 kV Transmission Line
  segment causes the Jonesboro to Hergett 161 kV
  Transmission Line segment to overload.
• Proposed Solution
• Re-conductor the Jonesboro to Hergett 161 kV
  Transmission line segment to at least 240 MVA.
• Proposed In Service Date 2012

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Jonesboro to Hergett Upgrade 161 kV Line
Re-Conductor the 161 kV Transmission Line from
Jonesboro to Hergett
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Ebony Switching Station Convert to a Breaker
Station

• Scenario
• The loss of West Memphis EHV to West Memphis Polk
  causes low voltages at WM Polk and WM Lehi. To
  prevent this, Ebony SS will be converted to a
  breaker station.
• Ebony SS ties together Kuhn Road, WM Gateway,
  Marked Tree, WM Lehi and WM Polk. The current
  configuration has Marked Tree to WM Lehi
  bypassing the switching station. This also
  prevents a creation of an operational guide for
  the TOC to remove the low voltages condition if
  an event should occur.
• Proposed Solution
• Convert Ebony SS to a 5 breaker station (Single
  Bus Single Breaker Scheme). Additional land may
  need to be purchased.
• Proposed In Service Date 2012

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Ebony Switching Station Convert to a Breaker
Station
Ebony SS Convert Ebony SS to a Ring Bus
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Beebe Install 21.6 MVAR Capacitor Bank

• Scenario
• The loss of the Cabot to Ward 115 kV Transmission
  line segment causes low voltages along line 937.
  Line 937 breaker to breaker is from Jacksonville
  North to Searcy Price. Since there is a capacitor
  bank at Cabot, the loss of Jacksonville to Cabot
  is not as severe. The Cabot capacitor bank is
  32.4 MVAR (30.53 MVAR at 115 kV).
• Proposed Solution
• Install a 21.6 MVAR, 115 kV capacitor bank at
  Beebe Substation.
• Proposed In Service Date Winter 2010

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Beebe Install 21.6 MVAR Capacitor Bank
Beebe Install 21.6 MVAR Capacitor Bank
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Holland Bottoms - Hamlet Construct New 161 kV
Line

• Scenario
• The loss of the 161 kV transmission line from
  Pleasant Hill to Quitman causes an overload on
  the Conway West to Donaghey and Donaghey to
  Conway South 161 kV transmission line sections.
  There are two 161 kV transmission lines that push
  power to North/Northwest Arkansas due to daily
  and long term/firm transactions. One of the lines
  runs through the City of Conway (Morrilton East
  to Quitman) and the other is north of Conway
  (Pleasant Hill to Quitman). When the Pleasant
  Hill to Quitman line trips the Morrilton to
  Conway West to Quitman line now has to handle not
  only the load in the Conway area but the
  transactions flowing North.
• Proposed Solution
• Convert Hamlet SS to a breaker station (Single
  Bus Single Breaker Scheme)
• Move the Quitman line from Gold Creek to Hamlet
  SS
• Move the Gravel Ridge line from Gold Creek to
  Hamlet SS
• Construct a line from Hamlet SS to Holland
  Bottoms with a rating no less than 1200 Amps
• Proposed In Service Date 2012

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Holland Bottoms to Hamlet Construct New 161 kV
Line
Hamlet Convert to a breaker station
Construct a new 161 kV Transmission Line from
Holland Bottoms to Hamlet
Holland Bottoms
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Benton North - Benton SouthConstruct New 115 kV
Line

• Scenario
• The loss of Mabelvale to Bryant 115kV
  Transmission Line segment causes on overload on
  the Hot Springs EHV to Butterfield line section
  and low voltages at Benton South, Bryant and
  Alcoa Road substations.
• Proposed Solution
• Convert Benton South SS to a breaker stations
  (Single Bus Single Breaker Scheme)
• Convert Benton North SS to a breaker stations
  (Single Bus Single Breaker Scheme)
• Construct a line from Benton South to Benton
  North
• The new line needs to be rated to at least 170
  MVA
• Proposed In Service Date 2012

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Benton North to Benton SouthConstruct New 115
kV Line
Benton North SS Convert to a breaker station
Construct a new 115 kV Transmission Line from
Benton North to Benton South
Benton South SS Convert to a breaker station
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Mt Ida Install 10.8 MVAR Capacitor Bank

• Scenario
• The loss of Hot Springs to Bismarck 115 kV
  Transmission line segment causes low voltages
  along the Hot Springs EHV to Murfreesboro 115 kV
  Transmission Line. The source from the South,
  SWEPCO's area, is not strong enough to support
  the load on this line.
• Proposed Solution
• Install a 10.8 MVAR Capacitor Bank at Mt Ida
  Substation.
• Proposed In Service Date 2011

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Mt Ida Install 10.8 MVAR Capacitor Bank
Mt Ida Install 10.8 MVAR Capacitor Bank
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Sarepta Emerson Install a 10.8 MVAR Capacitor
Bank

• Scenario
• With the forecasted 2008 summer peak load model,
  a single contingency analysis was performed in
  the ELL-North-West area with and without the
  potential load additional of 28 MW at the new
  substation close to Arcadia.
• Proposed Solution
• Install a 345/115kV Auto at the Serepta 115 kV
  substation
• Install a 10.8 MVAR capacitor bank at Emerson
• Install a 32.4 MVAR cap bank at Lucky
• Install a 32.4 MVAR cap bank at Vienna
• Proposed In Service Date 2011

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Sarepta Emerson Install a 10.8 MVAR Capacitor
Bank
Emerson Install 10.8 MVAR Capacitor Bank
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Transmission System Target Areas 2013 and Beyond
9) Lake Village Bagby to Macon Lake Upgrade 115
kV Line 10) Mayflower to Morgan Upgrade 115 kV
Line 11) Russellville East to Russellville
North Upgrade 161 kV Line 12) Camden North to
Camden McGuire Construct a 115 kV Line 13)
Poyen Install a 10.8 MVAR Capacitor Bank 14) El
Dorado Upland to Texas Eastern F Construct 115
kV Line 15) Gobel Construct 230/115 kV
Substation
1) Little Rock Re-Conductor 115 kV Transmission
Lines 2) Norfork Sage Upgrade 161 kV Line 3)
Bull Shoals to Midway Upgrade 161 kV Line 4)
Gum Springs Construct Switching Station 5) Gum
Springs to Amity Construct 115 kV Line 6)
Holland Bottoms to Ward Construct 2nd 115 kV
Line 7) Jim Hill to Datto Convert 115 kV Line
to 161 kV Or Construct a New 161 kV Line 8)
Jonesboro Construct a 500/161 kV Substation
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Entergy Mississippi, Inc.Proposed Transmission
Reliability Projects

• Transmission Planning Summit

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2010 - 2012 EMI Transmission Reliability Projects
Horn Lake Energize Auto Upgrade Horn Lake TH
Allen 161kV Line 2011
Getwell 230/115kV Auto Getwell-Hernando 230kV
Line (Operate at 115kV) 2013
Grenada/Winona/Greenwood Area Improvement 2010
2012
McAdams 500/230kV Auto Upgrade McAdams-Pickens
230kV Line 2011
Indianola-Greenwood 115 kV 2010
Ray Braswell - Byram 115kV Line 2013
Ridgeland - Madison Reliability
Improvement 2011-12
Install 500/115kV Auto at Baxter Wilson 2012
South Jackson Florence 115kV Line Upgrade
Switches at Morton 2010
Waterways E. Vicksburg 115kV Line Upgrade 2011
Florence - Star 115kV Line Upgrade 2011
Upgrade Breakers and Switches at Baxter Wilson
and Ray Braswell 2010
Upgrade Switches at Magee 2010
46
Indianola-Greenwood Line Upgrade

• Scenario
• The Indianola - Greenwood 115KV line, located in
  central Mississippi, is approximately 28 miles
  long and is limited to a rating of 120 MVA by
  equipment in the Moorhead, Itta Bena, and
  Greenwood substations.
• Loss of several sections including
  Pickens-Durant, Durant-Bowling Green,
  Attala-Kosciusko and Delta-Ruleville causes the
  Indianola-Moorhead section to overload.
• Recommended Solution
• Replace the limiting substation equipment and
  increase the rating of the line to 161 MVA.
• Proposed In Service Date Winter 2010

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Indianola-Greenwood Line Upgrade
Greenwood 115 kV Substation Upgrade Substation
Equipment
Itta Bena 115 kV Substation Upgrade Substation
Equipment
Moorhead 115 kV Substation Upgrade Substation
Equipment
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Upgrade Switches at Magee Substation

• Scenario
• Entergy and SMEPA have a tie at Magee substation
  through two 161/115 kV, 150 MVA transformers.
• SMEPA has replaced the transformers with 336 MVA
  transformers to increase the contract path with
  Entergy. The switches on the 115kV side limits
  the new contract path limit to 480 MVA.
• Recommended Solution
• Replace the existing switches to increase the tie
  capability to full value (672 MVA) of the new
  transformers.
• Proposed In Service Date Winter 2010

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Upgrade Switches at Magee Substation
Magee 115 kV Substation Upgrade Substation
Equipment
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Upgrade Florence-South Jackson Line Switches at
Morton Substation

• Scenario
• TVA requested transmission service across
  Entergys transmission system from TVA to TVA.
  The transfer causes various lines to overload for
  a single contingency.
• Florence-South Jackson, Morton-Pelahatchie and
  Morton-West Forest (SOCO) 115kV lines overloads
  for the loss of Choctaw-WestPoint (TVA) 500kV
  line.
• Recommended Solution
• Re-conductor Florence-South Jackson line and
  increase the rating of the line to at least 183
  MVA.
• Upgrade switches at Morton substation (from
  600Amps to 1200 Amps) to increase the rating of
  Morton-Pelahatchie and Morton-West Forest (SOCO)
  lines to 176MVA and 154 MVA respectively.
• Proposed In Service Date Summer 2010

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Upgrade Florence-South Jackson Line Switches at
Morton Substation
Morton 115 kV Substation Upgrade Substation
Equipment
Florence South Jackson 115 kV Line Upgrade Line
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Baxter Wilson-Ray Braswell 500kV Line Equipment
Upgrade

• Scenario
• The Baxter Wilson to Ray Braswell 500kV line
  overloads for the loss of the Franklin-Grand Gulf
  500kV transmission line.
• Recommended Solution
• The breakers and switches at Baxter Wilson and
  Ray Braswell 500kV substations must be upgraded
  to at least 3000 A. This upgrade increases the
  line capacity to 2884MVA.
• Proposed In Service Date Summer 2010

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Baxter Wilson-Ray Braswell 500kV Line Equipment
Upgrade
Baxter Wilson 500 kV Substation Upgrade
Substation Equipment
Ray Braswell 500 kV Substation Upgrade
Substation Equipment
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Grenada/Winona/Greenwood Area Improvement

• Scenario
• The Greenwood, Winona, and Grenada area is
  supplied by five 115kV lines and will serve 390
  MW in 2009.
• The loss of one of these five 115 kV lines or the
  loss of the Tillatoba 230/115kV auto will cause
  various bus undervoltages and overloads on 2
  115kV lines.
• Recommended Solution
• Phase I Install a capacitor bank at Schlater (21
  MVAR), an additional bank at Winona (21 MVAR) and
  upgrade the bank at Greenwood (32 MVAR).
• Proposed In Service Date Winter 2010
• Phase II Build a 230kV line from Tillatoba to S.
  Grenada with 1,272 ACSR (or equivalent conductor)
  and install a 230/115kV autotransformer at
  S.Grenada.
• Proposed In Service Date 2012

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Grenada/Winona/Greenwood Area Improvement
South Grenada 115 kV Substation Install 230
115 kV Autotransformer
Tillatoba South Grenada 230 kV Line Construct
New Line
Schlater 115 kV Substation Install Capacitor Bank
Winona 115 kV Substation Install Capacitor Bank
Greenwood 115 kV Substation Upgrade Capacitor
Bank
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Florence-Star 115kV Line Upgrade

• Scenario
• The Florence Star 115kV line, located in
  central Mississippi, is approximately 7 miles
  long and is limited to a rating of 161 MVA.
• The loss of the Franklin Bogalusa EHV line will
  cause the line to overload.
• Recommended Solution
• Re-conductor the Florence-Star line and increase
  the rating of the line to 240 MVA.
• Proposed In Service Date 2011

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Florence-Star 115kV Line Upgrade
Florence Florence SS - Star 115 kV Line
Upgrade Line
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Horn LakeEnergize 230/161kV Autotransformer
Upgrade Horn Lake Allen (TVA) 161kV Line

• Scenario
• The Southaven and Senatobia areas, served by one
  230 kV line and two 115 kV lines, will total
  approximately 406 MW in 2009.
• The single contingency loss of the Freeport
  Horn Lake 230kV line will cause low voltages at 9
  substations.
• Recommended Solution
• Reconductor the Horn Lake TH Allen (TVA) 161kV
  line to a rating of at least 390 MVA and energize
  the idle 230/161kV autotransformer at Horn Lake.
• Proposed In Service Date 2011

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Horn Lake 230/161kV Auto Allen Line Upgrade
Horn Lake 230 kV Substation Energize 230 161
kV Autotransformer
Horn Lake TH Allen 161 kV Line Upgrade Line
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Reconductor Waterways-East Vicksburg 115kV Line

• Scenario
• Vicksburg-Ray Braswell 115kV line is 27 miles
  long and serves about 114MW load in 2011.
• The Waterways - East Vicksburg 115kV segment
  overloads for the loss of Baxter Wilson-Ray
  Braswell 500kV line.
• Recommended Solution
• Reconductor the Waterways - East Vicksburg 115kV
  segment to match the rating of
  Vicksburg-Waterways (240MVA) section.
• Proposed In Service Date 2011

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Reconductor Waterways-East Vicksburg 115kV Line
East Vicksburg Waterways 115 kV Line Upgrade
Line
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Ridgeland-Madison Reliability Improvement

• Scenario
• The Lakeover -NE Jackson - Rex Brown 115 kV line
  is 25 miles long and will serve 6 substations
  totaling 194 MW in 2009. A new substation,
  Sunnybrook will be fed from this line (2011)
  which will add to the existing line loading.
• The loss of the Rex Brown - Hico, Hico - N.
  Jackson 115 kV lines in 2009 causes overloads on
  the Lakeover - Livingston Rd 115 kV line. The
  loss of the Lakeover - Livingston Rd or
  Livingston Rd - Ridgeland 115 kV lines causes the
  Rex Brown - Hico - N. Jackson 115 kV lines to
  overload.
• Recommended Solution
• Build a 115 kV substation in the existing
  Northpark 230 kV substation and cut in the
  Lakeover-NE Jackson line at Northpark (between
  Ridgeland and Country Club). Connect the new
  circuit to the new 115 kV bus at the Northpark
  substation. This new circuit will be used for the
  feed to the new Sunnybrook substation.
  Double-Circuit the existing LakeoverLivingstonRi
  dgeland 115 kV line, upgrading the existing line
  to at least 231 MVA.
• Proposed In Service Date 2011/2012

63
Ridgeland-Madison Reliability Improvement
Sunnybrook
Northpark 115
Laveover Livingston Road 115 kV Line Upgrade
Line
Laveover Sunnybrook - Northpark 115 kV Line
Construct New Line
64
Install 2nd 500/230 kV Autotransformer at McAdams
Upgrade McAdams-Pickens 230 kV Line

• Scenario
• The 500/230 kV autotransformer at McAdams
  overloads for the loss of McAdams - Lakeover 500
  kV line.
• The McAdams - Pickens 230 kV line, which supports
  the Canton/Madison area, overloads when a 2nd
  500/230 kV autotransformer is added to eliminate
  the overload of the existing transformer.
• Recommended Solution
• Add 2nd 500/230 kV auto at McAdams substation.
  Upgrade McAdams - Pickens 230 kV line with double
  bundled 954 ACSR (or equivalent) to a capacity
  of at least 880MVA.
• Proposed In Service Date 2011

65
Install 2nd 500/230 kV Autotransformer at McAdams
Upgrade McAdams-Pickens 230 kV Line
McAdams 500 kV Substation Install Second 500
230 kV Autotransformer
McAdams Pickens 230 kV Line Upgrade Line
66
Add 2nd 500/115 kV Autotransformer at Baxter
Wilson

• Scenario
• This is a part of the reliability project that
  is required to add the Ouachita generating
  facility (Transmission Service Request) to
  Entergys transmission network.
• The existing 500/115 kV autotransformer at
  Sterlington will be moved and installed at Baxter
  Wilson substation.
• Proposed In Service Date 2012

67
Add 2nd 500/115 kV Autotransformer at Baxter
Wilson
Baxter Wilson 500 kV Substation Install Second
500 115 kV Autotransformer
68
Ray Braswell - Byram 115 kV Line Construction

• Scenario
• The SW Jackson to Byram to Brookhaven line is 53
  miles long and serves 162 MW of load.
• The loss of the SW Jackson to Elton or Elton to
  Byram 115 kV lines will cause overloads on three
  line sections from Brookhaven to Hazlehurst 115
  kV and undervoltages on various buses in 2009.
• In addition, the loss of Brookhaven - Wesson or
  Wesson - James Rd. will cause overloads on two
  line sections from SW Jackson to Byram.
• Recommended Solution
• Build a new 115 kV line from Ray Braswell through
  Wyndale (future substation) to Byram 115 kV
  substation with a rating of at least 261 MVA.
• Proposed In Service Date 2013

69
Ray Braswell Byram 115 kV Line Construction
Ray Braswell Byram 115 kV Line Construct New
Line (230 kV Construction)
70
Add 2nd 230/115 kV Autotransformer at Getwell
Getwell-Hernando 230 kV Line Construction

• Scenario
• The Hornlake-Hernando area in Northwest
  Mississippi is experiencing a high annual growth
  rate. The Getwell-Batesville 115 kV line will
  serve about 124 MW of load in 2013 and
  Getwell-Hornlake 115 kV serves about 145 MW.
• Loss of Getwell-Hernando 115 kV section overloads
  the Batesville-Sardis 115 kV section. Low
  voltages are also projected at Hernando,
  Coldwater and Senatobia substations. Loss of
  230/115 kV auto at Getwell overloads the
  Hornlake-Greenbrook segment.
• Recommended Solution
• Construct a new line from Getwell-Hernando with
  230 kV specifications (operating at 115 kV) with
  a minimum rating of 240 MVA.
• Install a second 230/115 kV autotransformer at
  Getwell.
• Proposed In Service Date 2013

71
Add 2nd 230/115 kV Autotransformer at Getwell
Getwell-Hernando 230 kV Line Construction
Getwell 230 kV Substation Add Second 230 115
kV Autotransformer
Getwell Hernando 115 kV Line Construct New
Line (230 kV Construction)
72
EMI Transmission System Target Areas 2014 and
Beyond
Southhaven Area Church Rd-Getwell 230 kV Line
North Mississippi Improvement PlanContinue
Getwell-Batesville 230kV line
Breakers at Hollandale and Belzoni
Rankin-Ind. Airport 115 kV
Lakeover-Canton 230 kV line