Cleco Power LLC
System Impact Study for Transmission Reservation Request
OASIS Request 73408113
The purpose of this study is to determine the availability of transfer capability across Cleco Power
LLC’s transmission system. This study will determine the ability to accommodate OASIS Request
73408113 for 8.4 MW of Network Transmission Service beginning January 1, 2010 up to 45 MW of
Network Transmission Service ending on January 1, 2019.
This study was performed using the base case models identified in the table below. The studies were run
using Siemens® PSS/e version 30 and MUST version 8.3 programs. Power flow models were developed
to reflect anticipated operational conditions, including load, generation, extended outages and confirmed
firm transactions, from January 1, 2010 through January 1, 2019.
Modifications to the base cases were made to reflect the latest information available. Changes that were
made include the following:
1. Existing network resource generation in the source balancing authority was re-dispatched to
allow for the transaction.
2. Customer’s resources were re-dispatched to allow the transaction.
3. Cleco load was scaled to reflect the latest load forecast.
4. Confirmed firm transmission reservations were modeled for the year 2010.
5. Active OASIS transmission service request with prior queue position were added.
If the flow on a monitored facility exceeds 100% of its emergency rating under normal and single
contingency conditions with the transfer in place, the loading on the facility will be compared with the
loading prior to the transfer. If the transfer causes an increase in flow greater than 3.0%, the facility is
expected to require improvement.
Furthermore, if the transfer results in transmission bus voltage levels falling below criteria under single
contingency conditions, then voltage support facility additions must be constructed.
With confirmed transactions, the ATC analysis indicates that the transaction is limited by the following
facilities with an impact greater than 3.0%. These limiting elements must be upgraded to eliminate the
transfer constraints they cause.
Study Results
ATC values were calculated for the study period and are listed below along with the limiting and
contingency element. Due to the closely interconnected nature with neighboring systems, violations
identified in directly interconnected transmission systems (“Affected System”) will require an Affected
System impact study with the identified Affected System(s) prior to the granting of transmission service.
Identified Affected System: None
Issued by: Cleco Power Transmission Planning Department
Issued on: November 25, 2009
1
This study includes the following active OASIS transmission service requests with prior queue position:
71847922, 71956063, 72310136, 72805097, 72981623, 1352934, 73436331, 73408102
Month/Year
2010
2011
2014
2019
Limiting Element
None
None
International Paper to Mansfield 138 kV
International Paper to Mansfield 138 kV
Contingency Element
ATC
(MW)
0
6
Dolet Hills to S.W.Shreveport 345 kV
Dolet Hills to S.W.Shreveport 345 kV
The following transmission bus voltage levels fall below planning criteria (0.92 p.u. under N-1) as a
direct result of the transaction for certain single contingencies. Affected busses and their worst
offending single contingency are provided below.
Year
2010
2011
2014
2019
Bus Voltage
Violations
None
None
I.P. Mansfield 138 kV
I.P. Mansfield 138 kV
Contingency Element
Bus Voltage
(P.U.)
Gravel Point Rd to Wallace Lake 138 kV
Gravel Point Rd to Wallace Lake 138 kV
0.8910
0.8780
Upgrade Cost Estimates
Upgrade cost estimates are planning estimates for transmission facilities owned by Cleco and are listed
below.
A facility study will provide detailed cost estimates and solutions for the required upgrades on the
limiting elements. Facility study results may be different due to transmission system configuration
changes and/or prior OASIS requests in the facilities study phase. Facilities owned by others will require
a system impact study and a facility study to obtain estimates of costs of required upgrades on the
systems owned by others.
Limiting Elements
International Paper to Mansfield 138 kV
International Paper 138 kV Substation Voltage
Planning Estimate
for Upgrade
Year
Needed
$1,000,000
$2,000,000
2013
2013
Proposed Upgrade
Installation of a 6 reactor in series with the Mansfield to I.P.Mansfield 138 kV transmission line and
can be placed in-service when needed will reduce the flow below 100% for an outage of the Dolet Hills
to S.W. Shreveport 345 kV transmission line at a cost of $1,000,000. In addition, 45 MVAR’s of
capacitance will be needed at the new Gravel Point 138 kV substation to improve the voltage at IP
Mansfield and Gravel Point 138 kV substation for the loss of the Gravel Point Road to Wallace Lake
138 kV line at a cost of $2,000,000. Hence, the total planning estimated cost for these upgrades is
$3,000,000.
Issued by: Cleco Power Transmission Planning Department
Issued on: November 25, 2009
2
Summary of System Impact Study Results:
OASIS
Period
Request
73408113 January 1, 2010 – January 1, 2019
Cases Used
2010 Summer Peak
2011 Summer Peak
2014 Summer Peak
2019 Summer Peak
Capacity ATC
(MW)
Available
45.0
Yes
45.0
Yes
0.0
No
6.0
Yes
The requested transfer capability is available for the transactions specified in the study as stated
below,
OASIS Request 73408113:
January 1, 2010 through January 1, 2011
45.0 MW
Total: 45.0 MW
January 1, 2011 through January 1, 2014
45.0 MW
Total: 45.0 MW
January 1, 2014 through January 1, 2019
Total:
0.0 MW
0.0 MW
Total:
6.0 MW
6.0 MW
January 1, 2019 through January 1, 2020
These results are based upon the most recent information available at the time of the study. TTC and
ATC values obtained in the study are for Cleco Power’s transmission system and are subject to
change as a result of any modifications to the assumptions utilized in the study.
Issued by: Cleco Power Transmission Planning Department
Issued on: November 25, 2009
3
Cleco Power LLC
Motor Start Study for Transmission Reservation Request
OASIS Request 73408113
The purpose of this study is to determine the ability to start motor loads on the Cleco Power LLC’s
transmission system. This study will determine the ability to accommodate OASIS Request 73408113.
This study will investigate starting the largest rated motor at the plant with the Balance of Plant load
already online. The largest motor studied is a 2,500 HP motor in 2010 up to two 5,000 HP motors
installed by 2013.
This study was performed using the base case models identified in the table below. The studies were run
using Siemens® PSS/e version 30 program. Power flow models were developed to reflect anticipated
operational conditions, including load, generation, extended outages and confirmed firm transactions,
from January 1, 2010 through January 1, 2019.
Modifications to the base cases were made to reflect the latest information available. Changes that were
made include the following:
1. Existing network resource generation in the source balancing authority was re-dispatched to
allow for the transaction.
2. Customer’s resources were re-dispatched to allow the transaction.
3. Cleco load was scaled to reflect the latest load forecast.
4. Confirmed firm transmission reservations were modeled for the year 2010.
5. Active OASIS transmission service request with prior queue position were added.
If the flow on a monitored facility exceeds 100% of its emergency rating under normal and single
contingency conditions while the motor is operating, the facility is expected to require improvement.
Furthermore, if starting the motor results in transmission bus voltage levels falling below criteria under
single contingency conditions, then voltage support facility additions must be constructed.
Study Results
This study includes the following active OASIS transmission service requests with prior queue position:
71847922, 71956063, 72310136, 72805097, 72981623, 1352934, 73436331, 73408102
Starting currents were calculated for the largest motor installed for each study year and are listed below.
Month/Year
2010
2011
2014
2019
Motor Starting MVA
Largest Motor Started
2,500 HP
2,500 HP
5,000 HP
5,000 HP
Issued by: Cleco Power Transmission Planning Department
Issued on: November 25, 2009
MW
MVAr
2.188
2.188
4.376
4.376
14.322
14.322
28.645
28.645
4
The following transmission bus voltage levels and line flows occur during motor start.
Motor Starting bus voltage and Transmission line load
Year
2010
2011
2014
2019
M
#
Balance of
Plant Load
Motor
1
1
2
1
2
1
2
MW,MVAr
6.47, 4.01
11.25, 6.97
13.17, 8.17
33.66, 20.86
37.51, 23.25
35.66, 22.10
39.51, 24.49
HP
2,500
2,500
2,500
5,000
5,000
5,000
5,000
Grav Pt Rd 138kV
No contingency
kV
0.9782
0.9752
0.9744
0.9487
0.9468
0.9448
0.9429
%Ld1
31
29
29
34
35
34
36
Grav Pt Rd 138kV
GPR-WLake out
kV
0.9543
0.9440
0.9407
0.8433
0.8336
0.8296
0.8193
%Ld
11
13
14
34
37
36
39
Grav Pt Rd 138kV
IPM-Man out
kV
0.9643
0.9628
0.9617
0.9247
0.9220
0.9216
0.9188
%Ld
24
29
30
62
65
64
67
Upgrade Cost Estimates
Upgrade cost estimates are planning estimates for transmission facilities owned by Cleco and are listed
below.
A facility study will provide detailed cost estimates and solutions for the required upgrades on the
limiting elements. Facility study results may be different due to transmission system configuration
changes and/or prior OASIS requests in the facilities study phase. Facilities owned by others will require
a system impact study and a facility study to obtain estimates of costs of required upgrades on the
systems owned by others.
Limiting Elements
Planning Estimate
for Upgrade
Year
Needed
None
Summary of Motor Start Study Results:
OASIS
Period
Request
73408113 January 1, 2010 – January 1, 2019
Cases Used
2010 Summer Peak
2011 Summer Peak
2014 Summer Peak
2019 Summer Peak
Capacity
(HP)
2,500
2,500
5,000
5,000
Results
Acceptable
Acceptable
Acceptable
Acceptable
These results are based upon the most recent information available at the time of the study. TTC and
ATC values obtained in the study are for Cleco Power’s transmission system and are subject to
change as a result of any modifications to the assumptions utilized in the study.
1
International Paper to Mansfield 138 kV transmission line load
Issued by: Cleco Power Transmission Planning Department
Issued on: November 25, 2009
5