TVA Border to SBA 3500 MW Significant Constraints – Significant Constraints – PASS 1 (Cont.) PASS 1 (Cont.) Thermal Loading (%) Thermal Loading (%) Rating Rating Without Without With With Limiting Elements Limiting Elements (MVA) (MVA) Request Request Request Request GKN Westland Aerospace GKN Westland Aerospace – – Halla Halla Climate Climate 107 107 107 107 92.6 92.6 92.6 92.6 106.0 106.0 106.0 106.0 Control 115 kV TL Control 115 kV TL Alex City Tap Alex City Tap – – Kellyton Kellyton 115 kV TL 115 kV TL 113 113 97.1 97.1 106.0 106.0 Kellyton Kellyton – – Sunny Level Tap 115 kV TL Sunny Level Tap 115 kV TL 113 113 99.0 99.0 107.8 107.8 Hollins Hollins – – Sunny Level Tap 115 kV TL Sunny Level Tap 115 kV TL 113 113 99.8 99.8 114.1 114.1 104.6 (1) (1) Sylacauga Sylacauga – – Hollins Hollins 115 kV TL 115 kV TL 113 113 104.6 119.1 119.1 (1) A current operating procedure is sufficient to alleviate this constraint without the (1) A current operating procedure is sufficient to alleviate this constraint without the addition of the proposed transfer. However, the additional transfer exacerbates the addition of the proposed transfer. However, the additional transfer exacerbates the loading on this facility such that the operating procedure becomes insufficient. loading on this facility such that the operating procedure becomes insufficient. 23
Significant Constraints Significant Constraints GA ITS APC MPC Gulf 24
Plant Gaston Harris Dam Sylacauga Hollins Hillabee P2 Kellyton Lay Dam P2 Alexander City Tap P16 Mitchell Dam Clanton Martin Dam Billingsly Jordan Dam Plant Franklin Yates Dam Bouldin Dam Thurlow Dam County Line Rd. GKN Westland Halla Climate P12 Autaugaville Snowdoun 25
TVA Border to SBA 3500 MW Significant Constraints Significant Constraints – – PASS 1 (Cont.) PASS 1 (Cont.) Thermal Loading (%) Thermal Loading (%) Rating Rating Without Without With With Limiting Elements Limiting Elements (MVA) (MVA) Request Request Request Request Oakman Tap Oakman Tap – – Gorgas 161 kV TL Gorgas 161 kV TL 193 193 80.7 80.7 122.6 122.6 Oakman Oakman Tap Tap – – Berry 161 kV TL Berry 161 kV TL 193 193 81.2 81.2 123.0 123.0 Pitts & Midway Tap Pitts & Midway Tap – – Berry 161 kV TL Berry 161 kV TL 193 193 83.4 83.4 125.2 125.2 Pitts & Midway Tap Pitts & Midway Tap – – Bankston Bankston 161 kV TL 161 kV TL 193 193 92.0 92.0 133.9 133.9 Fayette CS Fayette CS – – Bankston Bankston 161 kV TL 161 kV TL 193 193 93.8 93.8 135.8 135.8 Fayette TS Fayette TS – – Fayette CS 161 kV TL Fayette CS 161 kV TL 193 193 93.8 93.8 135.8 135.8 26
Significant Constraints Significant Constraints GA ITS APC MPC Gulf 27
(To TVA) Smith Dam P5 (To TVA) Berry Berry Bankston Bankston Plant Gorgas Plant Miller Plant Gorgas Plant Miller Kingville Fayette W Vernon West Vernon Bankhead Dam Holt Dam 28
TVA Border to SBA 3500 MW Significant Constraints – Significant Constraints – PASS 1 (Cont.) PASS 1 (Cont.) Thermal Loading (%) Thermal Loading (%) Rating Rating Without Without With With Limiting Elements Limiting Elements (MVA) (MVA) Request Request Request Request GS Steel – GS Steel – North Rainbow 115 kV TL North Rainbow 115 kV TL 112 112 81.7 81.7 103.8 103.8 GS Steel GS Steel – – Attalla 115 kV TL Attalla 115 kV TL 138 138 71.5 71.5 106.8 106.8 Leeds TS – Leeds TS – Argo DS 230 kV TL Argo DS 230 kV TL 602 602 75.8 75.8 107.0 107.0 Clay – Clay – Argo DS 230 kV TL Argo DS 230 kV TL 602 602 78.2 78.2 109.5 109.5 Attalla 161 / 115 kV Transformer 1 Attalla 161 / 115 kV Transformer 1 99 99 89.4 89.4 122.9 122.9 Attalla 161 / 115 kV Transformer 2 Attalla 161 / 115 kV Transformer 2 111 111 88.4 88.4 121.4 121.4 Attalla Attalla – – Albertville 161 kV TL Albertville 161 kV TL 193 193 96.7 96.7 132.9 132.9 29
Significant Constraints Significant Constraints GA ITS APC MPC Gulf 30
(To TVA) Plant Hammond (To TVA) Weiss Dam Sand Mtn. P6 Lookout Mountain P23 Attalla Goshen Altoona Altoona Plant Gadsden Plant Gadsden GS Steel GS Steel Rainbow City Oneonta P11 H.N. Henry Dam Clay P4 Argo Anniston Leeds
TVA Border to SBA 3500 MW Significant Constraints – Significant Constraints – PASS 1 (Cont.) PASS 1 (Cont.) Thermal Loading (%) Thermal Loading (%) Rating Rating Without Without With With Limiting Elements Limiting Elements (MVA) (MVA) Request Request Request Request Tanner Williams Tanner Williams – – Harleston Harleston 115 kV TL 115 kV TL 107 107 80.7 80.7 105.1 105.1 Wade SS – Wade SS – Harleston Harleston 115 kV TL 115 kV TL 104 104 89.3 89.3 114.4 114.4 32
Significant Constraints Significant Constraints GA ITS APC MPC Gulf 33
Plant Barry P8 Big Creek Blakeley Island Wade Plant Daniel
TVA Border to SBA 3500 MW Projects Identified Projects Identified Item Item Proposed Enhancements Proposed Enhancements Cost ($) Cost ($) P1 P1 Russell Dam Russell Dam – – Athena 230 kV TL Athena 230 kV TL $61,000,000 $61,000,000 $12,200,000 (2) (2) P2 P2 Gaston – Gaston – County Line Road 230 kV TL County Line Road 230 kV TL $12,200,000 P3 P3 South Hall South Hall – – Winder Primary 230 kV TL Winder Primary 230 kV TL $10,000,000 $10,000,000 P4 P4 Clay TS – Clay TS – Leeds TS 230 kV TL Leeds TS 230 kV TL $18,600,000 $18,600,000 P5 P5 Fayette – Fayette – Gorgas 161 kV TL Gorgas 161 kV TL $29,000,000 $29,000,000 Attalla 161 / 115 kV Transformers Attalla 161 / 115 kV Transformers $18,700,000 (1) (1) P6 P6 $18,700,000 Attalla – Attalla – Albertville 161 kV TL Albertville 161 kV TL P7 P7 Sylacauga Sylacauga – – Martin 115 kV TL Martin 115 kV TL $8,300,000 $8,300,000 P8 P8 Wade – Wade – Big Creek 115 kV TL Big Creek 115 kV TL $6,300,000 $6,300,000 - - - - Continued Continued - - - - (1) (1) Cost provided is for the portion of the solution located within Cost provided is for the portion of the solution located within the participating Transmission Owners’ territory the participating Transmission Owners’ territory (2) Advancement cost associated with a project in the latest Ten (2) Advancement cost associated with a project in the latest Ten Year Expansion Plan Year Expansion Plan 35
TVA Border to SBA 3500 MW Projects Identified Projects Identified Item Item Proposed Enhancements Proposed Enhancements Cost ($) Cost ($) - - - - Continued Continued - - - - P9 P9 Logtown Logtown West West - - NASA 115 kV TL NASA 115 kV TL $2,900,000 $2,900,000 $250,000 (2) (2) P10 P10 Jesup Jesup – – Ludowici Ludowici 115 kV TL 115 kV TL $250,000 P11 P11 Henry Dam Henry Dam – – Attalla 115 kV TL Attalla 115 kV TL $1,600,000 $1,600,000 P12 P12 Thurlow Thurlow Dam Dam – – Union Springs 115 Union Springs 115 kv kv TL TL $1,100,000 $1,100,000 P13 P13 Kathleen Kathleen – – Bonaire 115 kV TL Bonaire 115 kV TL $1,500,000 $1,500,000 P14 P14 South Park DS – South Park DS – Pratt City 115 kV TL Pratt City 115 kV TL $1,500,000 $1,500,000 P15 P15 Bessemer Bessemer – – South Bessemer 115 kV TL South Bessemer 115 kV TL $100,000 $100,000 P16 P16 Mitchell Dam – Mitchell Dam – North Selma 115 kV TL North Selma 115 kV TL $3,600,000 $3,600,000 P17 P17 Hattiesburg North Hattiesburg North – – Eaton 115 kV TL Eaton 115 kV TL $1,500,000 $1,500,000 - - - - Continued Continued - - - - (2) Advancement cost associated with a project in the latest Ten (2) Advancement cost associated with a project in the latest Ten Year Expansion Plan Year Expansion Plan 36
TVA Border to SBA 3500 MW Projects Identified Projects Identified Item Item Proposed Enhancements Proposed Enhancements Cost ($) Cost ($) - - - - Continued Continued - - - - P18 P18 Hattiesburg County Hattiesburg County – – Highway 11 115 kV TL Highway 11 115 kV TL $1,200,000 $1,200,000 $150,000 (2) (2) P19 P19 East Point East Point – – Morrow 115 kV TL Morrow 115 kV TL $150,000 P20 P20 Blankets Creek Blankets Creek – – Woodstock 115 kV TL Woodstock 115 kV TL $500,000 $500,000 $3,000,000 (1) (1) P21 P21 Collins – Collins – Magee 115 kV TL Magee 115 kV TL $3,000,000 P22 P22 Morton Morton – – Forest Industrial 115 kV TL Forest Industrial 115 kV TL $1,300,000 $1,300,000 P23 P23 Attalla – Attalla – Lookout Mountain 115 kV TL Lookout Mountain 115 kV TL $1,800,000 $1,800,000 (1) (1) Cost provided is for the portion of the solution located within Cost provided is for the portion of the solution located within the participating Transmission Owners’ territory the participating Transmission Owners’ territory (2) Advancement cost associated with a project in the latest Ten (2) Advancement cost associated with a project in the latest Ten Year Expansion Plan Year Expansion Plan SBA Total Cost (2011$) = $186,200,000 SBA Total Cost (2011$) = $186,200,000 37
TVA Border to SBA 3500 MW PowerSouth PowerSouth Screen Results Screen Results 38
TVA Border to SBA 3500 MW Significant Constraints Significant Constraints – – PASS 0 PASS 0 Thermal Loading (%) Thermal Loading (%) Rating Rating Without Without With With Limiting Elements Limiting Elements (MVA) (MVA) Request Request Request Request Brewton – Brewton – Castleberry Junction 115 kV TL Castleberry Junction 115 kV TL 142 142 84.8 84.8 101.0 101.0 Belleville – Belleville – Castleberry Junction 115 kV TL Castleberry Junction 115 kV TL 142 142 87.5 87.5 103.8 103.8 39
Plant McWilliams Belleville Castleberry P24 N Brewton Brewton Flomaton Shoal River Silverhill W. Brunswick Plant Crist
TVA Border to SBA 3500 MW Projects Identified Projects Identified Item Item Proposed Enhancements Proposed Enhancements Cost ($) Cost ($) P24 P24 Belleville Belleville – – Brewton 115 kV TL Brewton 115 kV TL $3,600,000 $3,600,000 PS Total Cost (2011$) = $3,600,000 PS Total Cost (2011$) = $3,600,000 41
TVA Border to SBA 3500 MW South Mississippi Electric South Mississippi Electric Screen Results Screen Results 42
TVA Border to SBA 3500 MW Significant Constraints Significant Constraints – – PASS 0 PASS 0 Thermal Loading (%) Thermal Loading (%) Rating Rating Without Without With With Limiting Elements Limiting Elements (MVA) (MVA) Request Request Request Request Purvis – Purvis – Morrow 161 kV TL 1 Morrow 161 kV TL 1 296 296 58.0 58.0 108.5 108.5 Purvis – Purvis – Morrow 161 kV TL 2 Morrow 161 kV TL 2 296 296 57.5 57.5 108.3 108.3 43
Laurel East W. Waynesboro P26 Plant Eaton Plant Morrow Purvis P25 Lumberton Hurricane Creek Benndale
TVA Border to SBA 3500 MW Projects Identified Projects Identified Item Item Proposed Enhancements Proposed Enhancements Cost ($) Cost ($) P25 P25 Purvis Bulk Purvis Bulk – – Morrow 161 kV TL Circuit 1 Morrow 161 kV TL Circuit 1 $1,900,000 $1,900,000 P26 P26 Purvis Bulk Purvis Bulk – – Morrow 161 kV TL Circuit 2 Morrow 161 kV TL Circuit 2 $1,900,000 $1,900,000 SME Total Cost (2011$) = $3,800,000 SME Total Cost (2011$) = $3,800,000 45
TVA Border to SBA 3500 MW (80%) 80% of Summer Peak Screen 80% of Summer Peak Screen � An additional screen at 80% of Summer Peak An additional screen at 80% of Summer Peak load was also evaluated per stakeholder load was also evaluated per stakeholder request request � No additional constraints were identified No additional constraints were identified � A A subset subset of the constraints found in the of the constraints found in the Summer Peak and Shoulder analysis were Summer Peak and Shoulder analysis were identified. identified. 46
2011 SERTP Questions on the TVA Questions on the TVA Questions on the TVA Questions on the TVA Border to SBA Transfer? Border to SBA Transfer? 47
EES Border EES Border to to SBA SBA 1500 MW 1500 MW 48
EES Border to SBA 1500 MW • Transfer Type: Transfer Type: Generation to Generation Generation to Generation • Source: Source: New generator interconnecting to the New generator interconnecting to the El Dorado 500 kV substation (EES) near El Dorado 500 kV substation (EES) near El Dorado, AR El Dorado, AR • Sink: Sink: Generation within the SBA Generation within the SBA Source Sink 49
DUKE TVA 0.5% 3% 28% 26% SMEPA 25% 18.5% 0.5% 13% 19% APC APC GA ITS GA ITS MPC 6% 1% Gulf 1% 3% 1% Source 1% PSEC Sink 50 50
EES Border to SBA 1500 MW Transmission System Impacts Transmission System Impacts � Thermal Constraints Identified: Thermal Constraints Identified: • Three (3) 230 kV Lines Three (3) 230 kV Lines • One (1) 230 / 115 kV Transformer One (1) 230 / 115 kV Transformer • Two (2) 161 / 115 kV Transformers Two (2) 161 / 115 kV Transformers • Two (2) 161 kV Lines Two (2) 161 kV Lines • Twelve (12) 115 kV Lines Twelve (12) 115 kV Lines Total Cost (2011$) = $197,650,000 Total Cost (2011$) = $197,650,000 51
EES Border to SBA 1500 MW Southern Balancing Southern Balancing Authority Authority Screen Results Screen Results 52
EES Border to SBA 1500 MW Significant Constraints Significant Constraints – – PASS 0 PASS 0 Thermal Loading (%) Thermal Loading (%) Rating Rating Without Without With With Limiting Elements Limiting Elements (MVA) (MVA) Request Request Request Request Lexington Lexington – – East Watkinsville 230 kV TL East Watkinsville 230 kV TL 602 602 93.7 93.7 102.5 102.5 Bio Bio – – Vanna Vanna 230 kV TL 230 kV TL 433 433 96.2 96.2 104.5 104.5 Russell Russell – – Lexington 230 kV TL Lexington 230 kV TL 596 596 98.0 98.0 107.0 107.0 53
Significant Constraints Significant Constraints GA ITS APC MPC Gulf 54
(To DUKE) Middlefork (To DUKE) Hartwell Dam Hartwell Energy Bio Vanna (To SCPSA) P1 Center S Hall Russell Dam Plant Dahlberg Athena Winder Lexington E. Watkinsville
EES Border to SBA 1500 MW Significant Constraints – Significant Constraints – PASS 1 PASS 1 Thermal Loading (%) Thermal Loading (%) Rating Rating Without Without With With Limiting Elements Limiting Elements (MVA) (MVA) Request Request Request Request LSA Tap LSA Tap – – GDC Tap 115 kV TL GDC Tap 115 kV TL 112 112 86.4 86.4 100.2 100.2 Fulton Fulton – – Jackson Tap B 115 kV TL Jackson Tap B 115 kV TL 138 138 88.9 88.9 103.8 103.8 Jackson Tap B – Jackson Tap B – Lowman Tap B 115 kV TL Lowman Tap B 115 kV TL 138 138 88.9 88.9 103.8 103.8 Fulton Fulton – – GDC Tap 115 kV TL GDC Tap 115 kV TL 112 112 92.1 92.1 105.9 105.9 Fulton – Fulton – Jackson Tap A 115 kV TL Jackson Tap A 115 kV TL 112 112 92.6 92.6 109.3 109.3 Lowman Tap A Lowman Tap A - - McIntosh 115 kV TL McIntosh 115 kV TL 112 112 92.7 92.7 109.4 109.4 56
Significant Constraints Significant Constraints GA ITS APC MPC Gulf 57
P2 Fulton Jackson McIntosh
EES Border to SBA 1500 MW Significant Constraints – Significant Constraints – PASS 1 (Cont.) PASS 1 (Cont.) Thermal Loading (%) Thermal Loading (%) Rating Rating Without Without With With Limiting Elements Limiting Elements (MVA) (MVA) Request Request Request Request Attalla 161 / 115 kV Transformer 1 Attalla 161 / 115 kV Transformer 1 111 111 88.4 88.4 106.9 106.9 Attalla 161 / 115 kV Transformer 2 Attalla 161 / 115 kV Transformer 2 99 99 88.4 88.4 108.2 108.2 Attalla Attalla – – Albertville 161 kV TL Albertville 161 kV TL 193 193 96.7 96.7 117.0 117.0 59
Significant Constraints Significant Constraints GA ITS APC MPC Gulf 60
(To TVA) Plant Hammond (To TVA) Weiss Dam Sand Mtn. P4 Attalla Goshen Altoona Plant Gadsden GS Steel GS Steel Rainbow City Oneonta H.N. Henry Dam Clay Anniston
EES Border to SBA 1500 MW Significant Constraints Significant Constraints – – PASS 1 (Cont.) PASS 1 (Cont.) Thermal Loading (%) Thermal Loading (%) Rating Rating Without Without With With Limiting Elements Limiting Elements (MVA) (MVA) Request Request Request Request Oakman Tap Oakman Tap – – Gorgas 161 kV TL Gorgas 161 kV TL 193 193 80.7 80.7 116.0 116.0 Oakman Oakman Tap Tap – – Berry 161 kV TL Berry 161 kV TL 193 193 81.2 81.2 116.4 116.4 Berry Berry – – Pitts &Midway Tap 161 kV TL Pitts &Midway Tap 161 kV TL 193 193 83.4 83.4 118.6 118.6 Bankston Bankston – – Pitts & Midway Tap kV TL Pitts & Midway Tap kV TL 193 193 92.0 92.0 127.3 127.3 Fayette CS – Fayette CS – Bankston Bankston 161 kV TL 161 kV TL 193 193 93.8 93.8 129.1 129.1 Fayette TS Fayette TS – – Fayette TS 161 kV TL Fayette TS 161 kV TL 193 193 93.8 93.8 129.1 129.1 62
Significant Constraints Significant Constraints GA ITS APC MPC Gulf 63
(To TVA) Smith Dam P12 (To TVA) Bankston Bankston Berry Berry Plant Gorgas Plant Miller Kingville Fayette W Vernon West Vernon Bankhead Dam Holt Dam
EES Border to SBA 1500 MW Significant Constraints – Significant Constraints – PASS 1 (Cont.) PASS 1 (Cont.) Thermal Loading (%) Thermal Loading (%) Rating Rating Without Without With With Limiting Elements Limiting Elements (MVA) (MVA) Request Request Request Request 104.6 (1) (1) Sylacauga – Sylacauga – Hollins Hollins 115 kV 115 kV 113 113 104.6 118.0 118.0 Hollins – Hollins – Sunny Level Tap 115 kV Sunny Level Tap 115 kV 113 113 99.4 99.4 113.1 113.1 Sunny Level Tap Sunny Level Tap – – Kellyton Kellyton 115 kV 115 kV 113 113 93.2 93.2 106.9 106.9 Kellyton – Kellyton – Alexander City Tap 115 kV Alexander City Tap 115 kV 113 113 91.3 91.3 105.0 105.0 (1) A current operating procedure is sufficient to alleviate this constraint without the (1) A current operating procedure is sufficient to alleviate this constraint without the addition of the proposed transfer. However, the additional transfer exacerbates the addition of the proposed transfer. However, the additional transfer exacerbates the loading on this facility such that the operating procedure becomes insufficient. loading on this facility such that the operating procedure becomes insufficient. 65
Significant Constraints Significant Constraints GA ITS APC MPC Gulf 66
Plant Gaston Harris Dam Sylacauga Hollins Hillabee P10 Kellyton Lay Dam Alexander City Tap Mitchell Dam Martin Dam Billingsly Jordan Dam Plant Franklin Yates Dam Bouldin Dam County Line Rd. Thurlow Dam Autaugaville Snowdoun
EES Border to SBA 1500 MW Significant Constraints – Significant Constraints – PASS 1 (Cont.) PASS 1 (Cont.) Thermal Loading (%) Thermal Loading (%) Rating Rating Without Without With With Limiting Elements Limiting Elements (MVA) (MVA) Request Request Request Request Opp Opp – – S. Enterprise 230 kV TL S. Enterprise 230 kV TL 498 498 96.7 96.7 104.8 104.8 S. Enterprise XFMR 230/115 kV S. Enterprise XFMR 230/115 kV 250 250 96.1 96.1 106.9 106.9 68
Significant Constraints Significant Constraints GA ITS APC MPC Gulf 69
P9 Pinckard Webb S. Enterprise
EES Border to SBA 1500 MW Significant Constraints – Significant Constraints – PASS 1 (Cont.) PASS 1 (Cont.) Thermal Loading (%) Thermal Loading (%) Rating Rating Without Without With With Limiting Elements Limiting Elements (MVA) (MVA) Request Request Request Request Spanish Fort Spanish Fort – – Belforest Belforest 115 kV 115 kV 212 212 96.9 96.9 102.8 102.8 Barry Barry – – Stockton 115 kV Stockton 115 kV 212 212 97.7 97.7 103.1 103.1 Wade Wade – – Harleston Harleston 115 kV 115 kV 104 104 87.5 87.5 105.7 105.7 71
Significant Constraints Significant Constraints GA ITS APC APC MPC Gulf 72
P6 Plant Barry P11 Big Creek Blakeley Island Wade P5 Plant Daniel
EES Border to SBA 1500 MW Projects Identified Projects Identified Item Item Proposed Enhancements Proposed Enhancements Cost ($) Cost ($) Russell Dam Russell Dam – – Athena 230 kV TL Athena 230 kV TL P1 P1 $61,000,000 $61,000,000 P2 P2 Fulton Area Improvements Fulton Area Improvements $27,600,000 $27,600,000 $250,000 (2) (2) P3 P3 Jesup Jesup – – Ludowici Ludowici 115 kV TL 115 kV TL $250,000 Attalla 161 / 115 kV Transformers Attalla 161 / 115 kV Transformers $18,700,000 (1) (1) P4 P4 $18,700,000 Attalla Attalla – – Albertville 161 kV TL Albertville 161 kV TL P5 P5 Blakeley Island Blakeley Island - - Silverhill Silverhill 115 kV TL 115 kV TL $11,100,000 $11,100,000 Barry Barry - - Atmore 115 kV TL Atmore 115 kV TL P6 P6 $6,300,000 $6,300,000 P7 P7 Logtown Logtown West West - - NASA 115 kV TL NASA 115 kV TL $1,100,000 $1,100,000 $1,400,000 (1) (1) P8 P8 Morton Morton – – Forest Industrial 115 kV TL Forest Industrial 115 kV TL $1,400,000 P9 P9 South Enterprise South Enterprise – – Opp Opp 230 kV TL 230 kV TL $22,100,000 $22,100,000 - - - - Continued Continued - - - - (1) Cost provided is for the portion of the solution located within the (1) Cost provided is for the portion of the solution located within the participating Transmission Owners’ territory participating Transmission Owners’ territory (2) (2) Advancement cost associated with a project currently in the latest Ten Year Advancement cost associated with a project currently in the latest Ten Year Expansion Plan Expansion Plan 74
EES Border to SBA 1500 MW Projects Identified Projects Identified Item Item Proposed Enhancements Proposed Enhancements Cost ($) Cost ($) - - - - Continued Continued - - - - P10 P10 Sylacauga Sylacauga – – Martin 115 kV TL Martin 115 kV TL $8,300,000 $8,300,000 P11 P11 Wade Wade – – Big Creek 115 kV TL Big Creek 115 kV TL $6,300,000 $6,300,000 P12 P12 Fayette Fayette – – Gorgas 161 kV TL Gorgas 161 kV TL $29,000,000 $29,000,000 $3,000,000 (1) (1) P13 P13 Collins Collins – – McGee 115 kV TL McGee 115 kV TL $3,000,000 (1) (1) Cost provided is for the portion of the solution located within the Cost provided is for the portion of the solution located within the participating Transmission Owners’ territory participating Transmission Owners’ territory SBA Total Cost (2011$) = $196,150,000 SBA Total Cost (2011$) = $196,150,000 75
EES Border to SBA 1500 MW PowerSouth PowerSouth Screen Results Screen Results 76
EES Border to SBA 1500 MW Significant Constraints Significant Constraints – – PASS 0 PASS 0 Thermal Loading (%) Thermal Loading (%) Rating Rating Without Without With With Limiting Elements Limiting Elements (MVA) (MVA) Request Request Request Request Clayhatchee Clayhatchee – – Dale County 115 kV TL Dale County 115 kV TL 157 157 83.0 83.0 105.0 105.0 77
P14 Headland Blakeley Dale County Clayhatchee Pinckard Plant Farley Holmes Creek Plant Scholz
EES Border to SBA 1500 MW Projects Identified Projects Identified Item Item Proposed Enhancements Proposed Enhancements Cost ($) Cost ($) P24 P24 Clayhatchee Clayhatchee – – Dale County 115 kV TL Dale County 115 kV TL $1,500,000 $1,500,000 PS Total Cost (2011$) = $1,500,000 PS Total Cost (2011$) = $1,500,000 79
EES Border to SBA 1500 MW (80%) 80% of Summer Peak Screen 80% of Summer Peak Screen � An additional screen at 80% of Summer Peak An additional screen at 80% of Summer Peak load was also evaluated per stakeholder load was also evaluated per stakeholder request request � No additional constraints were identified No additional constraints were identified � A A subset subset of the constraints found in the of the constraints found in the Summer Peak and Shoulder analysis were Summer Peak and Shoulder analysis were identified. identified. 80
2011 SERTP Questions on the EES Questions on the EES Questions on the EES Questions on the EES Border to SBA Transfer? Border to SBA Transfer? 81
SCPSA Border SCPSA Border to to SBA SBA 1000 MW 1000 MW 82
SCPSA Border to SBA 1000 MW • Transfer Type: Transfer Type: Load to Generation Load to Generation • Source: Source: Uniform load reduction in SCPSA Uniform load reduction in SCPSA • Sink: Sink: Generation within the SBA Generation within the SBA Source Sink 83
DUKE TVA 1% 0.5% 4.5% 12% SMEPA 8% 75% 0.5% 14.5% APC APC 2.5% 2.5% GA ITS GA ITS MPC 3% 1% Gulf 1% 0.5% 0% Source 0.5% PSEC Sink 84 84
SPCSA Border to SBA 1000 MW Transmission System Impacts Transmission System Impacts � Thermal Constraints Identified: Thermal Constraints Identified: • Two (2) 230 kV Lines Two (2) 230 kV Lines • Two (2) 161 / 115 kV Transformers Two (2) 161 / 115 kV Transformers • Two (2) 161 kV Lines Two (2) 161 kV Lines • Eight (8) 115 kV Lines Eight (8) 115 kV Lines Total Cost (2011$) = $95,260,000 Total Cost (2011$) = $95,260,000 85
SCPSA Border to SBA 1000 MW Southern Balancing Southern Balancing Authority Authority Screen Results Screen Results 86
SCPSA Border to SBA 1000 MW Significant Constraints Significant Constraints – – PASS 0 PASS 0 Thermal Loading (%) Thermal Loading (%) Rating Rating Without Without With With Limiting Elements Limiting Elements (MVA) (MVA) Request Request Request Request Lexington Lexington – – East Watkinsville 230 kV TL East Watkinsville 230 kV TL 602 602 93.7 93.7 103.3 103.3 Bio Bio – – Vanna Vanna 230 kV TL 230 kV TL 433 433 96.2 96.2 104.0 104.0 Russell Russell – – Lexington 230 kV TL Lexington 230 kV TL 596 596 98.0 98.0 107.8 107.8 87
Significant Constraints Significant Constraints GA ITS APC MPC Gulf 88
(To DUKE) Middlefork (To DUKE) Hartwell Dam Hartwell Energy Bio Bio Vanna (To SCPSA) P1 Center S Hall Russell Dam Plant Dahlberg Athena Winder Lexington E. Watkinsville
SCPSA Border to SBA 1000 MW Significant Constraints – Significant Constraints – PASS 1 PASS 1 Thermal Loading (%) Thermal Loading (%) Rating Rating Without Without With With Limiting Elements Limiting Elements (MVA) (MVA) Request Request Request Request Daniel Siding Daniel Siding – – Rich Hill Tap 115 kV TL Rich Hill Tap 115 kV TL 255 255 95.8 95.8 102.1 102.1 105.2 (1) (1) Rich Hill Tap Rich Hill Tap – – Little Ogeechee 115 kV TL Little Ogeechee 115 kV TL 255 255 105.2 111.5 111.5 Horse Creek Horse Creek – – Elam Chapel 115 kV TL Elam Chapel 115 kV TL 155 155 88.2 88.2 102.3 102.3 Zuta Zuta – – Townsend 115 kV TL Townsend 115 kV TL 114 114 87.1 87.1 101.4 101.4 Jesup Jesup – – North North Jesup Jesup 115 kV TL 115 kV TL 124 124 87.7 87.7 106.0 106.0 North North Jesup Jesup – – Rayonier 115 kV TL Rayonier 115 kV TL 124 124 98.6 98.6 116.6 116.6 (1) A current operating procedure is sufficient to alleviate this constraint without the (1) A current operating procedure is sufficient to alleviate this constraint without the addition of the proposed transfer. However, the additional transfer exacerbates the addition of the proposed transfer. However, the additional transfer exacerbates the loading on this facility such that the operating procedure becomes insufficient. loading on this facility such that the operating procedure becomes insufficient. 90
Significant Constraints Significant Constraints GA ITS APC MPC Gulf 91
(To SCEG) Plant McIntosh Effingham Vidalia (To SCPSA) Plant Kraft P8 Little Ogeechee Boulevard Daniel Siding Plant Hatch P7 Horse Creek Dorchester P9 Ludowici Offerman Jesup P5 Townsend Zuta Thalmann W. Brunswick Plant McManus
SCPSA Border to SBA 1000 MW Significant Constraints – Significant Constraints – PASS 1 (Cont.) PASS 1 (Cont.) Thermal Loading (%) Thermal Loading (%) Rating Rating Without Without With With Limiting Elements Limiting Elements (MVA) (MVA) Request Request Request Request Attalla 161 / 115 kV Transformer 1 Attalla 161 / 115 kV Transformer 1 111 111 88.4 88.4 100.4 100.4 Attalla 161 / 115 kV Transformer 2 Attalla 161 / 115 kV Transformer 2 99 99 88.4 88.4 101.6 101.6 Attalla Attalla – – Albertville 161 kV TL Albertville 161 kV TL 193 193 96.7 96.7 109.9 109.9 93
Significant Constraints Significant Constraints GA ITS APC MPC Gulf 94
(To TVA) Plant Hammond (To TVA) Weiss Dam Sand Mtn. P10 Attalla Goshen Altoona Altoona Plant Gadsden Plant Gadsden GS Steel GS Steel Rainbow City Oneonta H.N. Henry Dam Clay Anniston
SCPSA Border to SBA 1000 MW Significant Constraints – Significant Constraints – PASS 1 (Cont.) PASS 1 (Cont.) Thermal Loading (%) Thermal Loading (%) Rating Rating Without Without With With Limiting Elements Limiting Elements (MVA) (MVA) Request Request Request Request Fayette CS Fayette CS – – Bankston Bankston 161 kV TL 161 kV TL 193 193 93.8 93.8 101.3 101.3 Fayette TS – Fayette TS – Fayette TS 161 kV TL Fayette TS 161 kV TL 193 193 93.8 93.8 101.4 101.4 96
Significant Constraints Significant Constraints GA ITS APC MPC Gulf 97
(To TVA) Smith Dam P4 (To TVA) Bankston Bankston Berry Berry Plant Gorgas Plant Miller Plant Gorgas Plant Miller Kingville Fayette W Vernon West Vernon Bankhead Dam Holt Dam
SCPSA Border to SBA 1000 MW Significant Constraints Significant Constraints – – PASS 1 (Cont.) PASS 1 (Cont.) Thermal Loading (%) Thermal Loading (%) Rating Rating Without Without With With Limiting Elements Limiting Elements (MVA) (MVA) Request Request Request Request 104.6 (1) (1) Sylacauga – Sylacauga – Hollins Hollins 115 kV 115 kV 113 113 104.6 111.4 111.4 Hollins Hollins – – Sunny Level Tap 115 kV Sunny Level Tap 115 kV 113 113 99.8 99.8 106.5 106.5 Sunny Level Tap Sunny Level Tap – – Kellyton Kellyton 115 kV 115 kV 113 113 93.5 93.5 100.3 100.3 (1) A current operating procedure is sufficient to alleviate this constraint without the (1) A current operating procedure is sufficient to alleviate this constraint without the addition of the proposed transfer. However, the additional transfer exacerbates the addition of the proposed transfer. However, the additional transfer exacerbates the loading on this facility such that the operating procedure becomes insufficient. loading on this facility such that the operating procedure becomes insufficient. 99
Significant Constraints Significant Constraints GA ITS APC MPC Gulf 100
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