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Entergy Louisiana, LLC (North) Proposed Transmission Reliability Projects

Entergy Louisiana, LLC (North) Proposed Transmission Reliability Projects. ELL-North Transmission Reliability Projects. Northwest LA / South AR voltage support (Sarepta). NW Louisiana/South Arkansas Voltage Support Plan. Scenario:

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Entergy Louisiana, LLC (North) Proposed Transmission Reliability Projects

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  1. Entergy Louisiana, LLC (North)Proposed TransmissionReliability Projects

  2. ELL-North Transmission Reliability Projects Northwest LA / South AR voltage support (Sarepta)

  3. NW Louisiana/South Arkansas Voltage Support Plan Scenario: • The following single contingencies will result in low voltages to occur in the southwestern corner of the EAI service territory: • Loss of the Magnolia East - McNeil line segment • Loss of the Magnolia Steel - Magnolia East line segment • Loss of the Magnolia Steel - Kerlin S.S. line segment • Additionally the contingency outage of any of the following lines: • 115 kV line from Carroll to RingGold • 115 kV line from Truss to Vienna • 115 kV line from Vienna to MT. Olive • 115 kV line from SpringHill to Taylor • 115 kV line from Haynesville to Emerson • 115 kV line from Danville to Jonesboro • The low voltage concerns propagate into north Louisiana (Lucky substation). • Capacitor bank additions alone do not provide sufficient improvement to this region. • The transmission grid performance can be improved by providing a new EHV source to the area. Proposed Solution: • Build a new 345 - 115 kV station at Sarepta by tapping the El Dorado to Longwood 345kV line • Install a 21.6 MVAR capacitor bank at Emerson. • Install a 32.4 MVAR cap bank at Lucky • Install a 32.4MVAR cap bank at Vienna • Proposed In-Service Date: 2011 Estimated Cost: $26 MM

  4. Emerson/ Sarepta Area Emerson: 21.6 MVAr Capacitor Bank Sarepta: Build 345 - 115kV substation; Tap El Dorado-Longwood line

  5. Cap Bank Installation

  6. Identified Target Areas 2012 and Beyond Complete 230 kV loop around W. Monroe Area Sterlington to Bastrop fix Red Gum Area 115kV Voltage Improvement Plan Grambling–Winnfield Reenergize 230 kV Line 115kV System Improvement Around Delhi Plantation & Red Gum115 kV Line Trap Upgrades

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