Company
LOGO
Cleco Construction Plan
Background Material
Models
• Cleco uses SPP’s annual series of models
to determine the NERC reliability
violations.
• Cleco uses 2nd quarter SPP “final” models
for the Construction Plan studies.
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.
Software
• Cleco uses Siemens Power Technologies
International software; PSS®E and
PSS®MUST for powerflow and stability
analysis.
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.
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.
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.
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.
Company
LOGO
Cleco Construction Plan
2009 - 2019
Construction Plan
• Approved transmission projects in year 1
(2009).
• Budgeted transmission projects in years
(2 – 5).
• Proposed transmission projects in years
(6 – 10).
Approved Transmission Projects
2009
• Add Capacitor Banks (18 MVARS) at
Caney Substation (LaGen)
Approved Transmission Projects
2009
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.
Approved Transmission Projects
2009
Caney (LaGen) 18 MVAR Capacitor Bank
2009
Caney (LaGen)
18 MVAR
Capacitor Bank
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
Acadiana Load Pocket Project
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.
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 @ 0.8960 P.U.
Madisonville 230 KV bus @ 0.8737 P.U.
Mandeville 230 KV bus @ 0.8816 P.U.
Ramsay 230 KV bus @ 0.8829 P.U.
Questions?