Cleco Construction Plan Background Material

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Cleco Construction Plan Background Material
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Models

• Cleco uses SPPs annual series of models to
  determine the NERC reliability violations.
• Cleco uses 2nd quarter SPP final models for the
  Construction Plan studies.

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Subsystem Files

• Monitored elements include Cleco and Cleco Ties
  to neighboring systems.
• Contingency elements include all of Cleco,
  Entergy, LUS, LEPA, and part of AEP.

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Software

• Cleco uses Siemens Power Technologies
  International software PSSE and PSSMUST for
  powerflow and stability analysis.

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Planning Criteria

• All lines in service
• Voltage must remain between 0.95 and 1.05 pu.
  Voltage deviation greater than or equal to 0.03
  pu between base case and study model requires an
  upgrade.
• MVA flow should not exceed Rate A (Normal
  rating). Flow increase greater than or equal to
  3 between base case and study model requires an
  upgrade.

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Planning Criteria

• Under contingencies (n-1)
• Voltage must remain between 0.92 and 1.05 pu.
  Voltage deviation greater than or equal to 0.03
  pu between base case and study model requires an
  upgrade.
• MVA flow should not exceed Rate B (Emergency
  rating). Flow increase greater than or equal to
  3 between base case and study model requires an
  upgrade.

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Operating guides

• Cleco currently has 2 operating guides.
• Dolet Hills Operating guide- Loss of the 345 kV
  line from Dolet Hills to SW Shreveport causes
  overloads on the underlying 138 and 230 kV
  system. Dolet Hills generation is reduced to
  relieve the overloads.
• Wells Reactor- Relaying at Wells senses the flow
  on the Wells Auto and any time the Auto overloads
  the Reactor comes in to relieve this overload.
• Cleco does not recognize operating guides when
  granting new transmission service.

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Budget Process

• Cleco performs yearly AC (n-1) and DC (n-2)
  analysis for each model in the SPP annual series
  of models using the previous mentioned Monitored
  and Contingency files.
• A mitigation plan is developed and submitted to
  SPP for any Cleco element that violates Planning
  Criteria.
• Transmission Planning submits projects to the
  budgeting committee for consideration in years 1
  through 5.
• Projects approved by the budget committee become
  part of the Construction Plan.
• Planning Criteria violations in years 6 10
  identified for Long Range Construction Plan
  projects.

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Cleco Construction Plan

• 2009 - 2019

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Construction Plan

• Approved transmission projects in year 1 (2009).
• Budgeted transmission projects in years (2 5).
• Proposed transmission projects in years (6
  10).

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Approved Transmission Projects 2009

• Add Capacitor Banks (18 MVARS) at Caney
  Substation (LaGen)

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Approved Transmission Projects2009 Caney
(LaGen) 18 MVAR Capacitor Bank

• Scenario
• Loss of Coughlin to Caney 138 kV line causes low
  voltage on Caney, Oakdale, West Bay, and
  Centennial 138 kV buses.
• Proposed Solution
• Install capacitance on the Caney 138 kV bus for a
  total of 18MVARs.

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Approved Transmission Projects2009 Caney
(LaGen) 18 MVAR Capacitor Bank
2009 Caney (LaGen) 18 MVAR Capacitor Bank
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Budgeted transmission projects in years (2 5).

• Acadiana Load Pocket (ALP) project
• Joint project with Lafayette and Entergy.
• Plans the ALP to N-1, G-1 which will prevent load
  shed in the event of a extended outage on Teche 3
  or Bonin 3.
• Creates additional 230 kV sources into the ALP
  which will provide maintenance and operational
  flexibility.
• Cost for Cleco will be 150 Million

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Acadiana Load Pocket Project
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Proposed transmission projects in years (6 10)

• Pineville to Sherwood 230KV Transmission Line
• Pineville to Sherwood 230KV line thermally
  overloads in the summer of 2019 to 101 of rated
  capacity when the Rapides to Twin Bridges 230KV
  line is taken out of service. Since the model is
  out 10 years and so close its thermal rating, the
  problem could be a result of load forecast
  inaccuracies. This will be monitored in
  subsequent planning assessment years to see if
  projected loads in the Alexandria area change and
  if this problem persists.
• Cane Bayou to Slidell 230KV Transmission Line
• Cane Bayou to Slidell 230KV line exceeds its
  thermal capacity in the summer of 2019 to 114.
  This occurs when the Madisonville to Mandeville
  230KV transmission line is taken out of service.
  Possible inaccuracies in load forecast could
  cause these results, however it is considered
  that some adjustments might be made to the
  protective devices allowing more line flow,
  retaining the current physical line
  characteristics.

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Proposed transmission projects in years (6 10)

• The summer 2019 model shows that when the French
  Settlement to Sorrento 230KV transmission line is
  taken out of service, several Cleco transmission
  buses experience low voltage. The voltage at
  these buses are below the criteria of 92 of
  nominal (i.e. 0.92 P.U.). Installation of
  capacitor banks within the North Lake area could
  mitigate this condition.
• Cane Bayou 230 KV bus _at_ 0.8960 P.U.
• Madisonville 230 KV bus _at_ 0.8737 P.U.
• Mandeville 230 KV bus _at_ 0.8816 P.U.
• Ramsay 230 KV bus _at_ 0.8829 P.U.

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Questions?