Facilities Study Ictt-2010-149 Transmission Service
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. TRANSMISSION LINE & SUBSTATION PROJECTS COMPANY:ENTERGY SERVICES, INC. CUSTOMER: ENTERGY SERVICE INC, (SPO) FACILITIES STUDY EJO NO. F4PPMS0248 ICTT-2010-149 TRANSMISSION SERVICE FACILITIES STUDY REPORT OASIS 74899996 Revision: 0 Issue Prepared Approved Rev Description of Revision Date By By Ibrahim Charles A 05/30/11 Submitted to TPD for input Khan Newell Rick Brian B 6/2/11 TPD Approval Bewley Warwick Sherri Ben 0 6/14/11 ICT Determines Upgrade Classification Maxey Roubique OASIS 74899996 Entergy Services, Inc. (SPO) Facilities Study TABLE OF CONTENTS 1. PROJECT SUMMARY ........................................................................ 3 1.1 Background and Project Need ...................................................................... 3 1.2 Scope Summary ........................................................................................... 3 1.3 Cost Summary .............................................................................................. 5 1.4 Schedule Summary ....................................................................................... 6 2. SAFETY REQUIREMENTS ................................................................. 6 3. GENERAL ASSUMPTIONS ................................................................ 6 4. SCOPE OF WORK .............................................................................. 7 4.1 Grimes Substation ........................................................................................ 7 4.2 New Substation (NSS) – 230 kV ................................................................ 18 4.3 Hartburg Substation – 500/230 kV ................................................................ 25 4.4 New 230 kV line to New Substation from Hartburg .................................... 34 4.5 Line Cut-in into New SS (Helbig to McLewis line) ...................................... 37 4.6 Line Cut-in New SS (Sabine to Georgetown lines) ..................................... 38 4.7 Sabine Substation – 230 kV ....................................................................... 40 4.8 Helbig Substation – 230 kV ........................................................................... 42 4.9 Georgetown Substation – 230 kV ............................................................... 43 5. COST ................................................................................................. 44 6. UPGRADE CLASSIFICATION .......................................................... 45 7. SCHEDULE ....................................................................................... 45 8. RISK ASSESSMENT ........................................................................ 47 9. CONFIRMED RESERVATIONS ........................................................ 48 10. PRE-888 TRANSACTIONS ............................................................... 52 11. STUDY QUEUE ................................................................................. 53 12. ATTACHMENTS ............................................................................... 54 12.1 Table of Acronyms .................................................................................. 54 12.2 One line & Substation Layout Drawing .................................................... 56 Page 2 of 56 OASIS 74899996 Entergy Services, Inc. (SPO) Facilities Study 1. PROJECT SUMMARY 1.1 Background and Project Need The purpose of this Facilities Study is to determine the availability of transfer capability across Entergy’s transmission system from Entergy (EES) to Entergy (EES) to evaluate the Entergy Services request for 450 MW of yearly network transmission service. The time period for this transfer is from 6/1/2012 until 6/1/2042. The direction of the transaction is EES to EES. The study was performed on the latest available 2012-2020 winter, 2013-2020 summer peak seasonal models, and the June 2012 – October 2012 monthly cases using PSS/E and MUST software by PTI. The Facilities Study identifies any transmission constraints resulting from the requested power transfer. The Facilities Study also includes cost estimates to correct any transmission constraints. 1.2 Scope Summary The Facilities Study has identified some transmission constraints. The following projects are needed prior to the start of transmission service. 1.2.1 2011-2013 Approved Entergy Construction Plan Projects needed by 6/1/2012 The following projects are approved in the 2011-2013 Entergy Construction Plan. These projects are required to be in-service prior to the start of transmission service: • Loblolly – Hammond: New 230 kV line – 2012 Expected ISD. • Bayou LaBoutte: Construct new 500-230 kV substation – 2011 Expected ISD. • Addis-Cajun: 230 kV line upgrade to 637 MVA. o Upgrade of Entergy owned equipment was completed in early 2011. o Upgrade of Louisiana Generating LLC owned equipment at Big Cajun #1 230 kV substation – Winter 2011 Expected ISD. • Jackson Miami Monument 115kV line: Upgrade line trap at Monument 115kV – 2011 Expected ISD. 1.2.2 2011-2013 Approved Entergy Construction Plan Projects needed by 6/1/2013 The following projects are approved in the 2011-2013 Entergy Construction Plan. These projects are required to be in-service prior to the 6/1/2013: Page 3 of 56 OASIS 74899996 Entergy Services, Inc. (SPO) Facilities Study • Big Three - Carlyss 230 kV: Upgrade bus, switch, and jumpers at Carlyss 230 kV substation – 2011 Expected ISD. • Carlyss - Rose Bluff 230 kV line: Upgrade bus, switch, and jumpers at Carlyss 230 kV substation – 2011 Expected ISD. 1.2.3 2011-2014 Approved Entergy Construction Plan Projects needed by 6/1/2014 The following projects are approved in the 2011-2013 Entergy Construction Plan. These projects are required to be in-service prior to the 6/1/2014: • Ray Braswell - Wynndale 115kV new line – 2013 Expected ISD. 1.2.4 Install a third 525 MVA, 345/138 kV autotransformer at Grimes The Grimes 345/138 kV autotransformer #1 or #2 overloads for the loss of the Grimes 345/138 kV autotransformer #2 or #1. It is required that a third 525 MVA, 345/138 kV autotransformer at Grimes be installed. The amount of capacity created by this upgrade is 525 MW, and the customer’s use of the capacity created is 0 MW. The third 345/138 kV Grimes autotransformer has been identified as a required upgrade in prior Facilities Studies (OASIS request 74846159). If the prior transmission service requests (OASIS 74846159) and proposed upgrade is withdrawn, this customer would be responsible for this upgrade. 1.2.5 Construct a new 230 kV substation; add a second 500/230 kV Hartburg autotransformer; and build a new 230 kV line from Hartburg 230 kV to the new 230 kV substation The following constraints are observed for this transmission service request: • Hartburg - Inland Orange - McLewis 230 kV FTLO Cypress - Hartburg 500 kV. • Cypress 500/138 kV autotransformer FTLO Cypress 500/230 kV autotransformer. • Cypress 500/230 kV autotransformer FTLO Cypress 500/138 kV autotransformer. Page 4 of 56 OASIS 74899996 Entergy Services, Inc. (SPO) Facilities Study It is required that the following project be constructed: New 230 kV five (5) terminal substation Re-route the McLewis - Helbig 230 kV transmission line (L-195) into the new five (5) breaker ring bus switchyard; connecting the McLewis and Helbig 230 kV substations to the new switchyard. Re-route the Sabine-Georgetown 230 kV transmission line (L-572) into the new five (5) breaker ring bus switchyard; connecting the Sabine and Georgetown 230 kV substations to the new switchyard. Hartburg – Install a second 800 MVA, 500/230 kV Autotransformer The amount of capacity created by this upgrade is 800 MW, and the customer’s use of the capacity created is 27 MW. Build a new 230 kV line from Hartburg 230 kV to the NSS. The amount of capacity created by this upgrade is 1042 MW, and the customer’s use of the capacity created is 31 MW. Replace eight (8) breakers at Sabine 230 kV (13180, 13185, 13190, 13195, 13200, 13255, 13260, and 13265) with an interrupting rating of at least 47 kA. Upgrade to 63kA IPO breakers. This project has been identified as a required upgrade in prior Facilities Studies (OASIS request #74899988_89). If both of the prior transmission service requests (OASIS #74899988_89) and proposed upgrade are withdrawn, this customer would be responsible for this upgrade. 1.2.6 Financial Rights for Supplemental Upgrades The following supplemental upgrade is impacted by this TSR by the specified MW amount. • South Jackson-Florence 115 kV – 1 MW Impact o Estimated Unit Rate - $95,874/MW o Related Facilities Study – ASA-2008-001 1.3 Cost Summary The estimated total project cost in 2011 dollars is $88,412,296. This cost does not include Tax Gross Up, which may apply. Please note these are 2011 dollars and do not include tax gross-up if and where applicable (Tax Gross Up rate at this time is 24.21%). Page 5 of 56 OASIS 74899996 Entergy Services, Inc. (SPO) Facilities Study Financial Rights: As described in Section 1.2.6 above, $95,874 in financial rights payment will be required to the customer funding supplemental upgrades that were impacted by this transmission request. This does not include Tax Gross Up, which may be included. The ICT has assigned $0 as Base Case upgrades and $88,316,422 as Supplemental Upgrade based on Attachment T of Entergy’s OATT. 1.4 Schedule Summary The requested date for the start of network transfer is June 1, 2012. This date will not be met and, based on Entergy project schedules, the upgrades will be completed by the end of December 2014. 2. SAFETY REQUIREMENTS