Generator Interconnection
Facility Study Report
Richmond County, NC – 282 MW
12/01/2007
Queue #90
February 22, 2005 (Final)
Progress Energy Carolinas, Inc.
Transmission Department
System Planning & Operations Department
Generator Interconnection Facilities Study Report:
Richmond County, NC – 282 MW, 12/01/2007,Queue #90
Introduction
The purpose of this Generator Interconnection Facility Study (GIFS) is to identify solutions
that resolve power flow, stability, and short circuit impacts identified in the Generator
Interconnection Impact Study (GIIS) and to determine the necessary facilities to
interconnect a new generating plant to the PEC Transmission System. This report also
provides refined estimates of the cost and in-service schedules for these items.
A Generator Interconnection Impact Study Agreement was executed on June 8, 2004 to
study the new generation facility described in Table 1. The GIIS was dated August 17, 2004
and identified the need for this GIFS. The Generator Interconnection Facilities Study
Agreement was executed and dated September 16, 2004. On September 17, 2004 the
Customer modified the facility output from 338 MW in the impact study to 282 MW for this
facility study. The Draft Facility Study was dated December 3, 2004. The Interconnection Customer
executed an E&P Agreement with PEC dated December 8, 2004. The Interconnection Customer provided
comments to the Draft Facility Study on January 11, 2005. Responses to these comments are attached.
Table 1: Request
PEC Generator
Interconnection
Queue No.
Queue #90
MW
In-Service
Date
282
12/01/07
County
Facility
Richmond County,
NC
PEC Richmond 500 kV
Substation, 230kV Yard
Facility Study Methodology
The analysis utilizes PSS/E and ASPEN software packages. Solutions are determined to
resolve transmission system impacts due to power flow, stability, and short circuit problems.
A schedule of work is determined to implement the necessary upgrades to the PEC
Transmission System in order to attempt to meet the Customer’s requested in-service date.
For solutions that are already in PEC’s future expansion plans but scheduled at a later target
date, accelerations to those projects are accommodated if possible. If the requested inservice date cannot be met, the earliest in-service date is provided. Additionally, for
situations where it may be necessary to begin construction activities prior to the execution of
a Generator Interconnection Agreement, PEC and the Interconnection Customer may
execute an Engineering & Procurement (E&P) Agreement that authorizes PEC to begin
engineering and procurement of long lead-time items necessary for the establishment of the
interconnection in order to advance the implementation of the interconnection request.
Finally, fully loaded cost estimates are determined for the necessary upgrades.
Affected Systems
The proposed generation at Richmond County is to be interconnected to PEC at the
existing PEC Richmond 500 kV Substation in the 230 kV yard. Since this is in close
proximity to PEC’s interconnection with Duke Energy, Duke Energy has been identified as
Progress Energy Carolinas
February 22, 2005(Final)
Transmission
System Planning & Operations
- Page 2 of 7 -
Generator Interconnection Facilities Study Report:
Richmond County, NC – 282 MW, 12/01/2007,Queue #90
an Affected System for this request and the Customer’s interconnection data was shared
with Duke Energy. Cost estimates on Affected Systems are not included in this report. It is
the Customer’s responsibility to contact Duke Energy to obtain the impacts and associated
costs due to this request.
Facility Study Results
There are no changes to the solutions initially presented in the Customer’s impact study.
This takes in to account the Customer’s change to the facility output. PEC identified existing
projects in its future plans that resolve some identified transmission system impacts in the
GIIS. There are no changes to those results in this study. The following costs are fully
loaded estimates of the solutions previously provided and do not include gross-up tax.
At the Customer’s request, the In order to meet the Customer’s request for a June 1, 2007
date for the facility’s first synchronization/testing, it will be necessary for the Customer and
PEC to execute an E&P Agreement by 01/01/2005. This will allow PEC to begin the
engineering and procurement and construction necessary to meet the Customer’s schedule
request. [The first synchronization/testing date was changed from March 1, 2007 to June 1, 2007 at the
Interconnection Customer’s request. This change did not alleviate the need for the E&P Agreement.]
Coordination between the Customer and PEC Transmission will be required during the
design, installation and both initial and on-going periodic calibration/testing of the
Customer’s out-of-step tripping scheme to ensure reliability and coordination with PEC’s
other protection systems. Note that this includes one PEC tie line with Duke Energy (the
Richmond-Newport 500 kV Line).
Power system stabilizers (PSS) will be necessary on each of the generating units as discussed
in the GIIS. Coordination between the Customer and PEC Transmission will be required
during the design and testing phases of the PSS installation.
Richmond 230 kV Substation
Substation and Protection Work: Installation of three 230 kV/3000A/63kA gas circuit
breakers, bus modifications, out-of-step relays and other protection, new Rockingham line
termination and new generator terminations ($1,904,345). Also includes line work associated
with re-termination of the existing Richmond-Rockingham 230 kV line. ($465,605).
Cost: $2,369,950
Rockingham 230 kV Substation
Substation and protection work: Installation of two 230 kV/3000A/63kA gas circuit
breakers, new bays, new Richmond line terminations address out-of-step relays and other
protection, replace five circuit breakers with 3000A/63kA capability due to short circuit
issues.
Cost: $2,481,419
Progress Energy Carolinas
February 22, 2005(Final)
Transmission
System Planning & Operations
- Page 3 of 7 -
Generator Interconnection Facilities Study Report:
Richmond County, NC – 282 MW, 12/01/2007,Queue #90
New Richmond – Rockingham 230 kV West Line
Line Work: Clearing approximately 95 acres of existing right-of-way, construction of
approximately 7.8 miles of new 230 kV transmission using steel H-frame with bundled 1590
ACSR conductor with one 7/16” EHS steel OHGW and one 30 fiber OPGW, .
Cost: $7,602,370
Richmond County Plant 230 kV Substation
Protection Work: Modify existing relays to address need for out-of-step protection.
Cost: $36,130
Raeford 230 kV Substation
Protection Work: New equipment and work associated with need for out-of-step protection.
Cost: $193,970
Laurinburg 230 kV Substation
Protection Work: New equipment and work associated with need for out-of-step protection.
Cost: $122,945
Cumberland 230 kV Substation
Protection Work: Modify existing relays to address need for out-of-step protection.
Cost: $37,226
Metering
A monthly fee for the purchase, installation, operation, testing, and maintenance of the
necessary metering equipment and remote terminal unit associated with metering the
Customer’s generation at the Point of Interconnection is estimated to be $3,000/month.
Schedule for Richmond County Site (Q#90)
Start PEC Survey of Substation & Line Engineering
Start Engineering Rich-Rock West 230 kV Line
Start Engineering Rich-Rock East
Start Engineering Rockingham 230
Substation equipment
Place CB Order
Begin Delivery
Start Construction
Back-feed (substation)
1st generator synchronization (stability)1
Commercial Operation Date
02/01/2005
01/01/2005
02/01/2005
08/01/2005
01/10/2005
04/14/2006
08/28/2006
03/01/2007
06/01/2007
12/01/2007
1
The Interconnection Customer must coordinate their generator testing schedule with PEC’s Energy Control
Center. Approval of the Interconnection Customer’s generator testing will be subject to system conditions.
Progress Energy Carolinas
February 22, 2005(Final)
Transmission
System Planning & Operations
- Page 4 of 7 -
Generator Interconnection Facilities Study Report:
Richmond County, NC – 282 MW, 12/01/2007,Queue #90
Summary
In order to meet the Customer’s request for a June 1, 2007 date for the facility’s first
synchronization/testing, it will be necessary for the Customer and PEC to execute an E&P
Agreement by 01/01/2005. This will allow PEC to begin the engineering and procurement
and construction necessary to meet the Customer’s requested schedule. [The first
synchronization/testing date was changed from March 1, 2007 to June 1, 2007 at the Interconnection
Customer’s request. This change did not alleviate the need for the E&P Agreement.]
With the exception of metering equipment, PEC assumes that its interconnection costs
described above would be classified as Network Upgrades, therefore, the Customer’s
payments are eligible for PEC transmission credits for PEC transmission service associated
with the output from the generation facility. Summary of cost estimates for interconnection
are:
Network Upgrades:
$12,844,010
Metering:
$3,000/Month
Progress Energy Carolinas
February 22, 2005(Final)
Transmission
System Planning & Operations
- Page 5 of 7 -
Generator Interconnection Facilities Study Report:
Richmond County, NC – 282 MW, 12/01/2007,Queue #90
Progress Energy Carolinas
February 22, 2005(Final)
Transmission
System Planning & Operations
- Page 6 of 7 -
Generator Interconnection Facilities Study Report:
Richmond County, NC – 282 MW, 12/01/2007,Queue #90
List of Customer’s Comments on the Draft
Generation Interconnection Facility Study Report
For Queue #90 Richmond County
Page 2, Facility Study Methodology Section Please explain what “fully loaded cost
estimates” are.
PEC Answer: Fully loaded is a phrase utilized at PEC to indicate a cost includes company
overheads (i.e., cost of benefits, cost of infrastructure, etc).
Page 2, Affected Systems Section Please confirm that in addition to providing data to
Duke Energy, Progress Energy will exchange data (including study analyses and assumptions
used) and coordinate with Duke Energy any work affecting both systems as a result of the
Customer’s interconnection. This coordination should be on the same level as if the
interconnecting generation were being installed by its own energy affiliates.
PEC Answer: PEC will provide Duke Energy this report and will continue to keep Duke
Energy aware of the status of this new interconnection and will ask Duke Energy to keep
PEC aware of the requirements they have placed on this request.
Page 3, Facility Study Results Section (Richmond 230 kV Substation) Please explain
whether the $465,605 estimate for removal of existing line facilities for rearrangement
includes removal of the portion of line that the Customer would be interested in purchasing
from Progress.
PEC Answer: The $465, 605 reported in the draft report is the cost associated with the rerouting/re-termination of the existing Richmond – Rockingham 230 kV East line from its
existing bay to a new bay. As a result, this cost includes both removal costs as well as some
installation costs for the re-termination. At the Customer’s request, PEC is developing a sale
cost for the facilities referred to in the question located at Richmond 230 kV Substation, that
PEC otherwise will remove.
Page 4, Schedule for Richmond County Site Please verify that the schedule reflects the
changes made subsequent to issuing the Draft Generation Interconnection Facilities Study
Report.
PEC Answer: Yes. Schedule changes have been made to the report.
Progress Energy Carolinas
February 22, 2005(Final)
Transmission
System Planning & Operations
- Page 7 of 7 -