Transcript No Slide Title

Entergy Arkansas, Inc.
Proposed Transmission
Projects
Entergy Transmission Planning Summit
New Orleans, LA
August 11, 2009
1
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
2, 3
4
4) Danville: Upgrade
Terminal Equipment
1
2
2010-2012 EAI Transmission Projects
1
1) Osage Creek –
Grandview: New
Line
7
6
2) Transmission
Service - OG&E
6) Transmission
Service – SMEPA
2
3) Holland Bottoms:
Construct
500/161/115 kV
Substation
4) Transmission
Service - Aquila
5) Warren East:
Install 10.8 MVAR
Capacitor Bank
3
7) Melbourne to Sage
161kV: Upgrade
Line
4
5
3
2010-2012 EAI Transmission Projects
1) Harrison to Everton
Road: Replace
Switches and Line
Trap
1
2
3
2) Transmission
Service – Westar
4
5
6
3) Jonesboro to
Hergett: Upgrade
161kV Line
4) Ebony Switching
Station: Convert to
a Breaker Station
6) Holland Bottoms to
Hamlet: Construct
New 161 kV Line
7
7) Benton North to
Benton South:
Construct New 115
kV Line
8) Mt Ida: Install 10.8
MVAR Capacitor
Bank
8
5) Beebe: Install 21.6
MVAR Capacitor
Bank
9) Sarepta: Emerson
Install a 10.8
MVAR Capacitor
Bank
9
4
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
5
Gillette: Install 10.8 MVAR Capacitor Bank
Gillette: Install 10.8
MVAR Capacitor
Bank
6
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
7
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
8
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
9
Danville: Upgrade Terminal Equipment
Danville: Upgrade
Substation Equipment
10
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
11
Osage Creek – Grandview: New Line
Grandview 161
kV Substation
Grandview – Osage Creek
161 kV Line: Construct
New Line
12
Supplemental Upgrades - OG&E
Scenario:
•
Supplemental upgrades for OG&E
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
13
Supplemental Upgrades - OG&E
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
14
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
15
Holland Bottoms: Construct 500/161/115 kV
Substation
Holland Bottoms
500/161/115 kV
Substation
16
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
17
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
18
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
19
Warren East: Install 10.8 MVAR Capacitor
Bank
Warren East: Install
10.8 MVAR Capacitor
Bank
20
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
21
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
22
Re-Conductor the 161
kV Transmission Line
from Dell to AECC
Manila
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
23
Melbourne to Sage 161kV: Upgrade Line
Re-Conductor the 161
kV Transmission Line
from Melbourne to
Sage
24
Harrison East to Everton Road:
Replace 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
25
Harrison to Everton Road: Replace Switches and Line
Trap
Harrison East: Replace
switches and line trap on the
Everton Road 161 kV
Transmission Line
26
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
27
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
28
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
29
Jonesboro to Hergett: Upgrade 161 kV Line
Re-Conductor the 161
kV Transmission Line
from Jonesboro to
Hergett
30
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
31
Ebony Switching Station: Convert to a
Breaker Station
Ebony SS: Convert
Ebony SS to a Ring
Bus
32
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
33
Beebe: Install 21.6 MVAR Capacitor Bank
Beebe: Install 21.6
MVAR Capacitor
Bank
34
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
35
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
36
Benton North - Benton South:
Construct 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
37
Benton North to Benton South:
Construct 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
38
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
39
Mt Ida: Install 10.8 MVAR Capacitor Bank
Mt Ida: Install 10.8
MVAR Capacitor
Bank
40
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
Install
Install
Install
a
a
a
a
345/115kV Auto at the Serepta 115 kV substation
10.8 MVAR capacitor bank at Emerson
32.4 MVAR cap bank at Lucky
32.4 MVAR cap bank at Vienna
Proposed In Service Date: 2011
41
Sarepta: Emerson Install a 10.8 MVAR
Capacitor Bank
Emerson: Install 10.8
MVAR Capacitor
Bank
42
Transmission System Target Areas
2013 and Beyond
1) Little Rock Re-Conductor
115 kV Transmission Lines
7
3
2) Norfork – Sage: Upgrade
161 kV Line
2
8
3) Bull Shoals to Midway:
Upgrade 161 kV Line
4) Gum Springs: Construct
Switching Station
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
10) Mayflower to
Morgan: Upgrade 115
kV Line
11) Russellville East to
Russellville North:
Upgrade 161 kV Line
11
6
10
5) Gum Springs to Amity:
Construct 115 kV Line
6) Holland Bottoms to Ward:
Construct 2nd 115 kV
Line
9) Lake Village Bagby to
Macon Lake: Upgrade
115 kV Line
12) Camden North to
Camden McGuire:
Construct a 115 kV
Line
1
13
5
15
4
12
9
14
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
43
Entergy Mississippi, Inc.
Proposed Transmission
Reliability Projects
Transmission Planning Summit
44
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
45
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
46
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
47
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
48
Upgrade Switches at Magee Substation
Magee 115 kV Substation:
Upgrade Substation
Equipment
49
Upgrade Florence-South Jackson Line & Switches at
Morton Substation
Scenario:
• TVA requested transmission service across Entergy’s 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
50
Upgrade Florence-South Jackson Line & Switches at
Morton Substation
Morton 115 kV
Substation: Upgrade
Substation Equipment
Florence – South Jackson 115
kV Line: Upgrade Line
51
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
52
Baxter Wilson-Ray Braswell 500kV Line Equipment
Upgrade
Baxter Wilson 500 kV Substation:
Upgrade Substation Equipment
Ray Braswell 500 kV Substation:
Upgrade Substation Equipment
53
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
54
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
Greenwood 115 kV
Substation: Upgrade
Capacitor Bank
55
Winona 115 kV
Substation: Install
Capacitor Bank
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
56
Florence-Star 115kV Line Upgrade
Florence – Florence SS - Star 115
kV Line: Upgrade Line
57
Horn Lake:
Energize 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
58
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
59
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
60
Reconductor Waterways-East Vicksburg 115kV Line
East Vicksburg –
Waterways 115 kV Line:
Upgrade Line
61
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 Lakeover–Livingston–Ridgeland 115 kV line, upgrading the existing line to at
least 231 MVA.
Proposed In Service Date: 2011/2012
62
Ridgeland-Madison Reliability Improvement
Sunnybrook
Northpark 115
Laveover – Livingston Road
115 kV Line: Upgrade Line
Laveover – Sunnybrook Northpark 115 kV Line:
Construct New Line
63
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
64
Install 2nd 500/230 kV Autotransformer at McAdams
& Upgrade McAdams-Pickens 230 kV Line
McAdams – Pickens 230 kV
Line: Upgrade Line
McAdams 500 kV Substation:
Install Second 500 – 230 kV
Autotransformer
65
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 Entergy’s transmission
network.
•
The existing 500/115 kV autotransformer at Sterlington will be moved and
installed at Baxter Wilson substation.
Proposed In Service Date: 2012
66
Add 2nd 500/115 kV Autotransformer at Baxter Wilson
Baxter Wilson 500 kV Substation:
Install Second 500 – 115 kV
Autotransformer
67
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
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Ray Braswell – Byram 115 kV Line Construction
Ray Braswell – Byram 115 kV
Line: Construct New Line
(230 kV Construction)
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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
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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)
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EMI Transmission System Target Areas
2014 and Beyond
Southhaven Area
North Mississippi Improvement Plan
Church Rd-Getwell 230 kV Line
Continue Getwell-Batesville 230kV line
Breakers at Hollandale
and Belzoni
Rankin-Ind. – Airport 115 kV
Lakeover-Canton 230 kV line
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