Transcript Summit Presentation – Part 4 - Southeastern Regional Transmission

Southeastern Region
Transmission Planning
10 Year Transmission
Expansion Plan
Southeastern Region
Transmission Planning
Disclaimer
 The projects described in this presentation represent
the current ten (10) year expansion plan. The
expansion plan is periodically reviewed and may be
revised due to changes in assumptions.
 This presentation does not represent a commitment to
build for projects listed in the future.
Southeastern Region
Transmission Planning
Regional Assumptions
Walker Park
Dahlberg
Hancock CC
Rocky Mtn
Warren Co Bio
McDonough
Vogtle
Wansley
West Georgia
Washington Co CT
Central AL
Tenaska
Harris CC
Rumble Road #1 CC
Elmore Co CC
Appling Co Bio
Kemper
Farley
McIntosh
SOWEGA
Lansing Smith CT
East Bainbridge
Existing Generation
Future Generation
Southeastern Region
Transmission Planning
Generation Assumptions utilized during the 2009
Transmission Expansion Planning Process
Year
Site
MW
2010
Dahlberg CT (SoCo)
292
Dahlberg CT (GTC)
-185
Tenaska, Heard
County (SoCo)
942
West Ga. Gen (GTC)
160
Rocky Mtn (GTC)
45
Wansley #7 CC (GTC)
409
Rocky Mtn (SoCo)
15
Year
Site
MW
2011
Rocky Mtn (GTC)
44
Rocky Mtn (SoCo)
15
Farley 1 Uprate (SoCo)
25
Lindsay Hill CC (GTC)
200
McDonough Coal 2
(SoCo)
-251
McDonough CC4
(SoCo)
840
McDonough CC5
(SoCo)
840
Walker Park (MEAG)
42
Wansley #7 CC (GTC)
166
East Bainbridge (GTC)
6
McIntosh 4 & 5 (PS)
448
Southeastern Region
Transmission Planning
Generation Assumptions utilized during the 2009
Transmission Expansion Planning Process
Year
Site
2012
McDonough CC6
(SoCo)
Walker Park (MEAG)
Farley 2 Uprate (SoCo)
MW
840
MW
Year
Site
2013
SOWEGA (GTC)
90
Central Alabama CC
(SoCo)
885
West Ga. Gen (GTC)
160
Dahlberg CT (SoCo)
-292
Dahlberg CT (GTC)
235
Kemper (SoCo)
600
Wansley #7 CC (GTC)
97
Appling Co Bio (GTC)
100
Warren Co Bio (GTC)
100
Walker Park (MEAG)
42
Baconton CT (SoCo)
-196
42
25
Wansley #7 CC (GTC)
409
WashingtonCo CT
(GTC)
551
Murray II (SoCo)
-620
McDonough Coal 1
(SoCo)
-250
2014
Southeastern Region
Transmission Planning
Generation Assumptions utilized during the 2009
Transmission Expansion Planning Process
Year
Site
2015
Hancock CC 1 (SoCo)
840
Rumble Road #1 CC
(GTC)
1162
2016
MW
Year
Site
2017 Vogtle 4 (GTC)
MW
330
Vogtle 4 (SoCo)
504
Vogtle 4 (MEAG)
250
Vogtle 4 (Dalton)
18
Hancock CC 2 (SoCo)
840
Wansley #6 CC (SoCo)
-572
Wansley #7 CC (GTC)
-97
SOWEGA CT (GTC)
-90
Vogtle 3 (GTC)
330
Vogtle 3 (MEAG)
250
Vogtle 3 (Dalton)
18
Vogtle 3 (SoCo)
504
Dahlberg CT (GTC)
140
WashingtonCo CT (GTC)
367
Hancock CC3 (SoCo)
840
Wansley #7 CC (GTC)
-409
Wansley #6 CC (GTC)
-286
WashingtonCo CT (GTC)
551
Harris (SoCo)
-628
2018 Wansley #6 CC (GTC)
L. Smith CTs (SoCo)
2019 Elmore Co CC1 (SoCo)
575
320
840
Southeastern Region
Transmission Planning
Region’s Planning Responsibilities
East
West
Southeastern Region
Transmission Planning
East
Georgia Integrated
Transmission System (ITS)
 Dalton Utilities
 GTC (Georgia Transmission Corporation)
 MEAG (Municipal Electric Authority of GA)
 Southern Company Transmission
Jointly
Planned ITS
Southeastern Region
Transmission Planning
Expansion Item ITS-1
Ola 230 / 115 kV Project
 Construct a new 230 kV circuit from Klondike to
Ola by way of two new GTC load stations,
Jackson Creek and East Lake
 Convert the existing East Lake – Ola 115 kV line
to 230 kV operation.
 Install a 400 MVA, 230 / 115 kV autobank at OLA
and three 115 kV breakers to terminate the lines
to McDonough, Porterdale and Island Shoals.
 The loss of the McDonough – Stockbridge 115
kV T.L. causes multiple facilities to overload.
2010 ITS-1
Southeastern Region
Transmission Planning
Expansion Item ITS-2
2010 ITS-2
North Americus Series Reactors
 Install two series reactors at North Americus, a 2%
230 kV series reactor on the North Americus – North
Tifton 230 kV line and a 2% 230 kV series reactor on
the North Americus – Talbot County #2 230 kV line.
 The loss of Hatch unit #1 and North Tifton 500 / 230 kV
transformer cause thermal overloads on the North
Americus – North Tifton 230 kV line. Additionally, the
loss of Hatch unit #2 and Fortson – North Tifton 500 kV
line cause thermal overloads on the North Americus –
Talbot County #2 230 kV line.
Southeastern Region
Transmission Planning
Expansion Item ITS-3
2010 ITS-3
McDonough 4 & 5 Network Improvement
 Construct the Jack McDonough – Smyrna 230 kV line
via Cumberland (convert from 115 kV) and Galleria
(new) substations. Add a 5 element, 230 kV ring bus at
Smyrna and replace the 300 MVA 230 / 115 kV
transformer with two 400 MVA transformers.
 The loss of the Jack McDonough – Peachtree 230 kV
T.L. will cause overloading of the facilities surrounding
McDonough.
Southeastern Region
Transmission Planning
Expansion Item ITS-4a
Pegamore 230 kV Project
 Construct a new 230 kV switching station
(Pegamore 230 kV SS) on the newly converted
Bowen – Villa Rica 230 kV line at Huntsville
Junction.
 Install three 230 kV breakers to terminate the
Bowen, Villa Rica, and McConnell Road 230 kV
Lines.
 Construct a new 230 kV line using existing ROW,
from Pegamore to Huntsville, and from Huntsville
to the McConnell Road 230 / 115 kV substation.
2010 ITS-4a
Southeastern Region
Transmission Planning
Expansion Item ITS-4b
2010 ITS-4b
Pegamore 230 kV Project
 Install a 230 kV breaker at McConnell substation
and terminate the Pegamore line. Convert the
Huntsville, Battlefield, and Cedarcrest substations
to 230 kV operation.
 This project will alleviate multiple thermal overloads
and provide approximately 100 MVAR's of reactive
support in the area.
Southeastern Region
Transmission Planning
Expansion Item ITS-5a
2010 ITS-5a
Thomson 500 / 230 kV Project
 Expand the 500 kV ring bus at Warthen and
terminate the Thomson Primary 500 kV line.
 Construct a 500 kV switchyard and expand the 230
kV switchyard at Thomson Primary.
 Install a 1344 MVA, 500 / 230 kV transformer at
Thomson Primary.
 Replace the 140 MVA, 230 / 115 kV transformer at
Thomson Primary with a 300 MVA transformer.
 Construct 23 miles of 230 kV line on new ROW from
Thomson Primary to Dum Jon.
Southeastern Region
Transmission Planning
Expansion Item ITS-5b
2010 ITS-5b
Thomson 500 / 230 kV Project
 Install a 230 kV breaker at Dum Jon to terminate the
Thomson Primary line.
 Replace the 125 MVA, 230 / 115 kV transformer at
Evans Primary with a 300 MVA transformer.
 Construct 35 miles of 500 kV line from Warthen to
Thomson Primary.
 The loss of the Goshen – Peach Orchard section of
the Dum Jon – Goshen 230 kV T.L. will overload the
Dum Jon – West Augusta 115 kV T.L. An outage of
the Goshen 230 kV #1 bus will overload both the
Goshen – Vogtle 230 kV T.L. (Black) and the
Goshen 230 / 115 kV #2 transformer.
Southeastern Region
Transmission Planning
Expansion Item ITS-6
2010 ITS-6
Union Point – Warrenton 115 kV Rebuild
 Rebuild the Union Point – Warrenton 115 kV line
(26.7 miles of 336 ACSR) with 1351 ACSR conductor
at 230 kV specifications.
 The loss of the East Social Circle – Madison Primary
115 kV T.L. will overload the Union Point – Warrenton
115 kV T.L.
Southeastern Region
Transmission Planning
Expansion Item ITS-7
Klondike 230 kV Reactor Project
 Install a 0.5 %, 230 kV series reactor.
 The loss of the Klondike – Norcross 500 kV T.L.
causes the Klondike 500 / 230 kV transformer to
overload.
2010 ITS-7
Southeastern Region
Transmission Planning
Expansion Item ITS-8a
Factory Shoals
 Create a 230 / 115 kV network substation at
Factory Shoals.
 Install one 230 / 115 kV 300 MVA transformer.
 Tap the Adamsville – Douglasville 230 kV line
from Buzzard Roost for 230 kV source using
existing line.
 Create a 115 kV network station by breakering
up the Douglasville – Greenbriar 115 kV line.
2011 ITS-8a
Southeastern Region
Transmission Planning
Expansion Item ITS-8b
Factory Shoals
 Install three 230 kV breakers at Buzzard
Roost, looping in the Adamsville- Douglasville
230 kV line, with a third terminal serving
Factory Shoals. Tap the Adamsville –
Douglasville 230 kV line from Buzzard Roost
for 230 kV source using existing line.
 Alleviates the overload of Gordon Road –
Hightower 115 kV T.L., Adamsville –
Greenbriar 115 kV T.L. and the Douglasville
230 / 115 kV transformer given various
contingencies.
2011 ITS-8b
Southeastern Region
Transmission Planning
Expansion Item ITS-9
Arkwright – Gordon #1 115 kV
Transmission Line
Rebuild the Arkwright – Gordon #1 115 kV
Transmission Line (23.6 miles) with 100° C 795
ACSR conductor.
This line becomes thermally overloaded given
multiple contingencies in 2011.
2011 ITS-9
Southeastern Region
Transmission Planning
Expansion Item ITS-10
East Social Circle 230 kV Series
Reactors
Install a 2%, 230 kV series reactor at East
Social on the Branch – East Social Circle 230
kV T.L.
The loss of the Franklin unit #2 and Branch –
East Social Circle 230 kV T.L.
2013 ITS-10
Southeastern Region
Transmission Planning
Expansion Item ITS-11
2014 ITS-11
East Carrollton 230 / 115 kV
Substation
 Construct the East Carrollton 230 / 115 kV substation
looping the Hickory Level – Yellowdirt 230 kV T.L. and
the Possum Branch – Yates 115 kV T.L..
 Reconductor 1.5 miles of 115 kV T.L. from Clem – Oak
Mtn. – Holox – East Carrollton – Southwire –
Carrollton #2 Junction
 With Yates unit #3 offline, the loss of Hickory Level –
Sand Hill 115 kV T.L. causes Mt. Zion – Jonesville
Junction 115 kV T.L. to overload. Additionally, the loss
of either Bremen or Hickory Level 230 / 115 kV
transformers will cause the other transformer to
exceed its rating.
Southeastern Region
Transmission Planning
Expansion Item ITS-12
Goshen – Waynesboro 115 kV
Transmission Line
Reconductor the Goshen – Waynesboro 115 kV
T.L., 18.7 miles, with 1033 ACSR.
Loss of the Wilson – Waynesboro 230 kV T.L. will
load the Goshen – Waynesboro 115 kV T.L. to
112% of its 124 MVA conductor rating.
2014 ITS-12
Southeastern Region
Transmission Planning
Expansion Item ITS-13
Hatch – Offerman 230 kV Transmission
Line
 Reconductor 27.1 miles of 230 kV T.L. from
Appling Biomass to Offerman.
 The loss of the 500 / 230 kV transformer at
Thalmann with Farley unit # 1 offline causes this
section to become overloaded.
2014 ITS-13
Southeastern Region
Transmission Planning
Expansion Item ITS-14
2014 ITS-14
Bethabara 230 / 115 kV project
 Delay project from 2011 to 2014.
Build a new 230 / 115kV substation (Bethabara).
Build a new 230 kV switching station (Clarksboro).
Build a new 115 kV switching station (Jefferson Rd).
Build a new 230kV T.L. from Bethabara to Clarksboro.
Build a new 115 kV T.L. from Bethabara to the Georgia
Square substation.
 Loop the Athens – Winder 115 kV T.L. into the 115 kV
Jefferson Road Switching Station.
 Project alleviates multiple thermal overloads in the
northeast Georgia area.
Southeastern Region
Transmission Planning
Expansion Item ITS-15a
2015 ITS-15a
East Walton 500 / 230 kV Project – P1
 Construct a new 500 /230 kV Substation at East
Walton.
 Construct a new Rockville 500 kV Switching
Station.
 Construct a new 500 kV T.L. from the new
Rockville 500 kV Switching Station to the new
East Walton 500 / 230 kV substation.
 Construct 230 kV T.L. from East Walton to Jacks
Creek
Southeastern Region
Transmission Planning
Expansion Item ITS-15b
2015 ITS-15b
East Walton 500 / 230 kV Project – P1
 Construct a new 230 kV T.L. from East Walton to
the new Bostwick Switching Station.
 Construct two new 230 kV T.L. from Bethabara
to East Walton.
 Reconductor Bostwick – East Watkinsville 230
kV T.L. and Center Primary – Clarksboro 230 kV
T.L. Replace line traps at Center and East
Watkinsville.
 The loss of the Klondike – Scherer 500 kV T.L.
will thermally overload the Klondike – O’Hara
500 kV T.L.
Southeastern Region
Transmission Planning
Expansion Item ITS-16
2016 ITS-16
Thomson Primary – Vogtle 500 kV Project
 Construct a 500 kV line from Plant Vogtle to the new
Thomson Primary 500 / 230 kV substation.
 This project is to support the expansion of Plant
Vogtle. A new 500 kV T.L. will be required from Plant
Vogtle to Thomson Primary to address generator
stability issues.
Southeastern Region
Transmission Planning
Expansion Item ITS-17
2017 ITS-17
South Metro Phase-III Project
 Rebuild the existing O'Hara – Bonanza – Hampton –
McDonough 115 kV T.L. with double circuit with
ACSR 1351 at 230 kV specifications.
 Create a new 230 kV circuit from O'Hara to
McDonough and add a 230 / 115 kV, 400 MVA
transformer at McDonough
 Construct a 115 kV T.L. between the Peeksville and
Ingram substations.
 Project alleviates multiple thermal overloads in the
metro Atlanta area.
Southeastern Region
Transmission Planning
Expansion Item ITS-18
2017 ITS-18
Dorchester 230 kV Project
 Construct a 45 mile 230 kV T.L. from Dorchester to
West Brunswick.
 Install a second 230 / 115 kV transformer and 230 kV
capacitor bank at Dorchester.
 Reconductor Dorchester – Little Ogeechee 230 kV T.L.
 This project is to alleviate multiple thermal overloads
for various contingencies in the Savannah Georgia
area.
Southeastern Region
Transmission Planning
Expansion Item ITS-19
2017 ITS-19
Middle Fork 500 / 230 kV Project
 Install a 500 / 230 kV transformer at Middle Fork and
loop the South Hall – Oconee 500 kV T.L.
 Required to support generation expansion in the
central Georgia area.
Southeastern Region
Transmission Planning
Expansion Item ITS-20
2017 ITS-20
Middle Fork – Thomson 500 kV
Transmission Line
 Construct a new 500 kV Transmission Line from
Middle Fork – Thomson (approximately 110 miles)
 Required to support generation expansion in the
central Georgia area.
Southeastern Region
Transmission Planning
Expansion Item ITS-21
2017 ITS-21
Hopewell – McGrau Ford 2nd 230 kV Line
 Construct a second 230 kV Transmission Line
between McGrau Ford and Hopewell.
 This project alleviates thermal overloads on the
Norcross – Ocee 230 kV T.L. and provides
additional voltage support for the North Georgia
area.
Southeastern Region
Transmission Planning
Expansion Item ITS-22
2017 ITS-22
O'Hara 500 / 230 kV Transformer #2 Addition
 Install a second 500 / 230 kV transformer at the O'Hara
substation.
 The loss of the 500 / 230 kV transformer at O'Hara
causes Union City's 500 / 230 kV transformer to
overload.
Southeastern Region
Transmission Planning
Expansion Item ITS-23
2017 ITS-23
South Hall – Suwanee 230 kV Transmission
Line
 Construct 19 miles of 230 kV T.L. from South Hall to
Suwanee.
 The loss of Norcross – South Hall 500 kV T.L. overloads
the South Hall – Shoal Creek 230 kV T.L.
Southeastern Region
Transmission Planning
Expansion Item ITS-24
East Walton – South Hall 500 kV
Transmission Line
 Construct a 500 kV T.L. from South Hall to East
Walton.
 Required to support generation expansion in the
central Georgia area.
2018 ITS-24
Southeastern Region
Transmission Planning
Expansion Item ITS-25
2018 ITS-25
Sharon Springs – Suwanee 230 kV
Transmission Line
 Construct 14.5 miles of 230 kV T.L. from Sharon Springs
to Suwanee.
 For the loss of the Norcross – South Hall 500 kV T.L.,
the South Hall – Spout Springs 230 kV T.L. becomes
overloaded.
Southeastern Region
Transmission Planning
Expansion Item ITS-26
South Coweta – Yates 115 kV
Transmission Line
 Reconductor approximately 19 miles consisting of
multiple sections of the South Coweta – Yates 115
kV T.L.
 For the loss of either end of the South Coweta –
Yates 115 kV T.L. with Yates unit #3 offline,
sections of the South Coweta – Yates 115 kV T.L.
become overloaded.
2018 ITS-26
Southeastern Region
Transmission Planning
Expansion Item ITS-27
2019 ITS-27
Blankets Creek – Holly Springs 115 kV
Transmission Line
 Construct a second Blankets Creek – Holly
Springs 115 kV T.L.
 For the loss of the Blankets Creek – Holly Springs
115 kV T.L., sections of the Holly Springs –
Nelson 115 kV T.L. become overloaded.
Southeastern Region
Transmission Planning
Expansion Item ITS-28
2019 ITS-28
Commerce Primary – Middle Fork 115 kV
Transmission Line
 Reconductor approximately 13.9 miles from Middle Fork
to North Commerce Junction.
 For the loss of the Middle Fork – South Hall 500 kV T.L.
sections of the Commerce Primary – Middle Fork 115
kV Transmission Line will become overloaded.
Southeastern Region
Transmission Planning
West
Coordinated Planning
 PS (PowerSouth Energy Cooperative)
 SMEPA (South Mississippi Electric
Power Association)
Coordinated
Planning
 Southern Company
Transmission
SMEPA
PowerSouth
Southeastern Region
Transmission Planning
Expansion Item W-1
East Pelham 230/115 kV Project
 East Pelham 230 / 115 kV substation in 2009
 New Ballentrae DS (East Pelham) – Double
Oak Mountain 115 kV T.L.
 New East Pelham – Alabaster SS 115 kV
T.L. in 2010.
 Upgrade Gaston – East Pelham
230 kV T.L. to 100° C operation
in 2015.
2009 W-1
Southeastern Region
Transmission Planning
Expansion Item W-2a
Carriere SW 230 / 115 kV
Substation Project
Construct approximately 18.4 miles of 230
kV line and a new 230 / 115 kV Carriere
Switching Station located ~ 5 miles north
of Picayune 115 kV substation.
Phase in project over time. (2009-20102011)
2009 W-2a
Southeastern Region
Transmission Planning
Expansion Item W-2b
Carriere SW 230 / 115 kV
Substation Project
The loss of the Necaise – Spence 115 kV
T.L. results in overload of Kiln – Nicholson
tap 115 kV T.L. and vice versa.
Phase in project over time. (2009-20102011)
2009 W-2b
Southeastern Region
Transmission Planning
Expansion Item W-3a
McIntosh – C.A.E.S. 115 kV T.L.
 Reconductor 1.74 mile McIntosh – C.A.E.S.
bundled (2) 795 26/7 ACSR 115 kV TL with
bundled (2) 795 26/7 ACSS @ 160°C
design.
 Loop Barry S.P. – McIntosh T.S. “B” 115 kV
TL into C.A.E.S. and reconductor this TL
from C.A.E.S. to McIntosh T.S. with
bundled (2) 795 26/7 ACSS @ 160°C
design (1.74 miles).
 Upgrade the C.A.E.S. and Barry S.P. “B”
115 kV terminals at McIntosh T.S. to 3000
A. Replace main bus at McIntosh T.S. with
2 – 1590 AAC.
2010 W-3a
Southeastern Region
Transmission Planning
Expansion Item W-3b
McIntosh – C.A.E.S. 115 kV T.L.
 With the new addition of generation at
C.A.E.S. and a Washington County
#1offline scenario and loss of West
McIntosh – C.A.E.S. 115 kV T.L., the
McIntosh T.S. – C.A.E.S. 115 kV T.L.
exceeds its thermal rating.
2010 W-3b
Southeastern Region
Transmission Planning
Expansion Item W-4
Laguna Beach 230 / 115 kV Substation
 Install a second 230 / 115 kV transformer at
Laguna beach substation.
 The loss of the Smith 230 / 115 kV transformer
with Smith unit #1 offline overloads the Laguna
Beach 230 / 115 kV transformer.
2011 W-4
Southeastern Region
Transmission Planning
Expansion Item W-5
Laguna Beach – Holiday 115 kV
Holiday – Hathaway Tap 115 kV
T.L.s
 Construct a new 115 kV T.L. from Laguna Beach
– Holiday
 Construct 1.25 of double circuit 115 kV T.L. from
Holiday – Hathaway Tap.
 With Smith unit #1 offline, the loss of Smith 230 /
115 kV transformer causes the Laguna Beach –
Lullwater Tap 115 kV to exceed its thermal
rating.
2011 W-5
Southeastern Region
Transmission Planning
Expansion Item W-6
Smith – Laguna Beach 115 kV T.L.
 Convert the Smith – Laguna Beach 115 kV T.L.
to 230 kV operation.
 With Crist unit #7 offline, the loss of the Laguna
Beach 230 / 115 kV transformer causes the
Smith – Laguna Beach 115 kV to exceed its
thermal limit.
2011 W-6
Southeastern Region
Transmission Planning
Expansion Item W-7
Mobile Area 115 kV Networking
 Construct a new Switching Station.
 Create ten new network 115 kV T.L. in the Mobile
Metro Area.
2012 W-7
Southeastern Region
Transmission Planning
Expansion Item W-8
Shoal River – Santa Rosa – Laguna
Beach 230 kV T.L.
 Construct a new Santa Rosa 230 KV substation
with two 230 / 155 kV transformers.
 Shoal River – Santa Rosa 230 kV T.L..
 Replace Laguna Beach – Santa Rosa #1 115 kV
T.L. with a new 230 kV T.L..
 In conjunction with Santa Rosa 230 / 115 kV
substation and rebuild of the Smith – Laguna
Beach T.L..
2012 W-8
Southeastern Region
Transmission Planning
Expansion Item W-9
Hillabee – Danway 230 kV T.L.
 Upgrade approximately 32 miles of 230 kV T.L.
from Hillabee to Danway S.S. to 110° C
operation.
 The loading on this line exceeds its thermal
rating under contingency conditions.
2013 W-9
Southeastern Region
Transmission Planning
Expansion Item W-10
Hillabee – North Opelika 230 kV T.L.
 Upgrade approximately 37.6 miles of 230 kV T.L.
from Hillabee to North Opelika to 110° C
operation.
 The loading on this line exceeds its thermal
rating under contingency conditions.
2013 W-10
Southeastern Region
Transmission Planning
Expansion Item W-11
Barry - Chickasaw 230 kV T.L.
 Reconductor 19.18 miles of 230 kV T.L. from
Barry Steam Plant – Chickasaw T.S.
 With Crist unit #7 and Hog Bayou Units offline,
the loss of the Barry – Crist 230 kV T.L. causes
overloading issues.
2013 W-11
Southeastern Region
Transmission Planning
Expansion Item W-12
Plant Greene County Substation
 Install a 230 / 115 kV transformer #2 at Plant
Greene County substation.
 Needed to alleviate thermal overloading.
2013 W-12
Southeastern Region
Transmission Planning
Expansion Item W-13
Pinckard – Slocomb 115 kV T.L.
 Reconductor 12.5 miles of 115 kV T.L. at 160º C.
Upgrade the Holmes Creek terminals at
Pinckard T.S. to 2000 A.
 The loss of Farley – Sinai Cemetery 230 kV T.L.
with Smith unit #3 offline causes the Pinckard –
Slocomb 115 kV to overload.
2013 W-13
Southeastern Region
Transmission Planning
Expansion Item W-14
Slocomb – Holmes Creek 115 kV T.L.
 Reconductor 8.23 miles of 115 kV T.L. from
Slocomb to the AL / FL State Line.
 The loss of Farley – Sinai Cemetery 230 kV T.L.
with Smith unit #3 offline causes this line to
overload.
2014 W-14
Southeastern Region
Transmission Planning
Expansion Item W-15
Snowdoun – Pike County 230 kV T.L.
 Upgrade 32.3 miles between Snowdoun and
Pike County to 100º C.
 The loss of Snowdoun – Farley 500 kV T.L.
causes the Snowdoun – Pike County to exceed
its thermal limit.
2014 W-15
Southeastern Region
Transmission Planning
Expansion Item W-16
Kemper County Generation
 IGCC plant addition in Kemper County,
Mississippi and construct all transmission
facilities required for firm service from the plant.
 Necessary to serve new base load generation.
2014 W-16
Southeastern Region
Transmission Planning
Expansion Item W-16
Gaston – East Pelham 230 kV T.L.
 Upgrade the Gaston – Twelve Oaks – East
Pelham 230 kV T.L. to 100° C operation.
 The loading on the Gaston – East Pelham 230
kV T.L. exceeds its thermal rating.
2015 W-17
Southeastern Region
Transmission Planning
Expansion Item W-16
Tuscaloosa Solution Phase 2
 Install a 230 / 115 kV Transformer at South
Duncanville.
 Construct a new 115 kV T.L. from South
Tuscaloosa to South Duncanville.
 Reconductor existing 2/0 115 kV T.L. to Big
Shanty Tap with 397 ACSR.
 Overloads caused by multiple contingencies.
 Voltage Support.
2016 W-18
Southeastern Region
Transmission Planning
Expansion Item W-19
Barry – Crist 230 kV T.L.
 Upgrade the Barry SP – Crist SP 230 kV T.L. to
125° C operation.
 With Crist #7 off-line, the loss of Barry S.P. –
Chickasaw 230 kV T.L. causes the Barry S.P. –
Crist S.P. 230 kV T.L. to exceed its rating.
2016 W-19
Southeastern Region
Transmission Planning
Expansion Item W-20
Orange Grove 230 / 115 kV Project
 Construct new 230 / 115 kV substation.
 Construct a new 115 kV T.L. between the new
substation and Chevron PRCP.
 Rebuild the T.L. between the new substation and
Bayou Casotte.
2017 W-20
Southeastern Region
Transmission Planning
Expansion Item W-21
County Line Road – Elmore County 230
kV T.L.
 Reconductor 18.2 miles from County Line Road to
Elmore Co with 1351 ACSS 160° C.
 Needed for the addition of Elmore County
Generation.
2019 W-21
Southeastern Region
Transmission Planning
Expansion Item W-22
Madison Park – Elmore County 230 kV
T.L.
Construct 29 miles of 230 kV T.L. from Madison Park
to Elmore County.
Needed for the addition of Elmore County
Generation.
2019 W-22
Southeastern Region
Transmission Planning
PowerSouth
Southeastern Region
Transmission Planning
Southeastern Region
Transmission Planning
Expansion Item PS-1
Liberty – Glendale – Defuniak T.L.
 Reconductor approximately 21 miles of 115 kV
T.L.
 With Smith unit #3 offline, high North to South
flow causes overloads. This is a project to
strengthen the system to respond to single
contingency conditions.
2011 PS-1
Southeastern Region
Transmission Planning
Expansion Item PS-2
Dale County – Bay Springs Junction
 Uprate to 100° C design temperature.
 This line overloads for Smith unit #3 offline and
N-1 contingency.
2011 PS-2
Southeastern Region
Transmission Planning
Expansion Item PS-3
Clio Area Project
 Construct new 14 miles Texasville Junction –
Judson with 795 ACSR.
 Upgrade Brundidge – Clio 115 kV T.L. to 100° C
operation.
 This is a project to uprate the aging lines to
handle more loading under contingency
conditions and to provide an additional source
for a radial load.
2012 PS-3
Southeastern Region
Transmission Planning
Expansion Item PS-4
Baldwin County Alabama
 Construct a new 115 kV T.L. from Miflin Junction
– Florida Avenue with one mile water crossing.
 Construct Miflin Switching Station.
 Thermal uprate Miflin Junction – Wolf Bay
Junction T.L.
 15 MVAR Cap Banks at Florida Avenue and Gulf
Shores.
 This is a project to strengthen the system of the
high load growth area, Orange Beach being
served radially, to respond to single contingency
conditions.
2012 PS-4
Southeastern Region
Transmission Planning
Expansion Item PS-5
Brewton – Freemanville 115 kV T.L.
 Uprate to 100° C operation.
 This line overloads under multiple unit out
scenarios and contingencies.
2012 PS-5
Southeastern Region
Transmission Planning
Expansion Item PS-6
Northen System Voltage Support
 Reconductor 115 kV T.L. from Fuller – Luverne.
 Construct a new 115 kV T.L. from Gantt to
Luverne.
 New 230 / 115 kV transformer at Gantt.
 This project provides voltage support to the
northern part of the system.
2014 PS-6
Southeastern Region
Transmission Planning
South Mississippi
Electric Power Association
Southeastern Region
Transmission Planning
SMEPA’s System Expansion Plan
10 Year Transmission Plan
 Years 2009 – 2013
Under Construction
Included in Transmission Construction Work Plan (TCWP)
 Years 2014 – 2019
Not Included in TCWP
Southeastern Region
Transmission Planning
Expansion Item SME-1
Cole Road Transformer Replacement
 Upgrade 2 Cole Road 161 / 69 kV transformers.
 161 / 69 kV Transformer overloads during
outage of adjacent unit.
 High load growth area.
2009 SME-1
Southeastern Region
Transmission Planning
Expansion Item SME-2
Polkville 161 kV Source
 Construct 161 / 69 kV Substation and T.L.
 Tap 161 kV T.L. ‘171’ with White Oak S.S.
 Project alleviates low voltages and overloads
and is required to support the industrial load
growth.
2010 SME-2
Southeastern Region
Transmission Planning
Expansion Item SME-3
Purvis Bulk Transformer Replacement
 Upgrade 2 Purvis Bulk 161 / 230 kV transformers.
 Relocate 2 161 / 230 kV Transformers to West
Waynesboro.
 Additional export capability needed in 2011.
2010 SME-3
Southeastern Region
Transmission Planning
Expansion Item SME-4
Silver Creek Interconnection
 Construct new Silver Creek 115 / 161 kV
Substation.
 Tap 161 kV T.L. ‘168’ and construct a new 161 kV
T.L.
 Single interconnection with Entergy (Magee).
Outage impacts SMEPA’s ability to serve offsystem load.
2011 SME-4
Southeastern Region
Transmission Planning
Expansion Item SME-5
Moselle 161 kV Generation
Expansion and Repower
 Add 2 – 83 MW Combustion Turbines at
SMEPA’s Moselle Generation Station.
 Repower 2 – 59 MW Steam Units with HRSGs.
 Required to improve generation deficient in
2012.
Comments
 Combined Cycle configuration most efficient
option.
 Building at existing facilities reduces
construction time.
2012 SME-5
Southeastern Region
Transmission Planning
Expansion Item SME-6
South Hoy 161 kV Source
 Construct a new 161 / 69 kV substation at South
Hoy.
 Construct a new 161 kV T.L. from Moselle to
South Hoy.
 This project alleviates 69 kV low voltages and
multiple line overloads during 69 kV
contingencies.
2012 SME-6
Southeastern Region
Transmission Planning
Expansion Item SME-7
Prentiss 161 / 69 kV Substation
 Tap Silver Creek 161 kV Interconnection.
 Construct Prentiss 161 / 69 kV Substation.
 This project alleviates 69 kV low voltages and
multiple line overloads during 69 kV
contingencies.
2013 SME-7
Southeastern Region
Transmission Planning
Expansion Item SME-8
East Waynesboro 230 / 69 kV
Substation
 Tap 230 kV T.L. ‘230’ (PowerSouth Tie) and 69
kV T.L. ‘23’.
 Construct East Waynesboro 230 / 69 kV
Substation.
 Upgrade supporting 69 kV transmission.
 This project alleviates 69 kV low voltages and
multiple line overloads during 69 kV
contingencies.
 69 kV transmission capacity.
2017 SME-8