Generation Interconnection Facilities Study Report for PJM ...

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Generation Interconnection

Facilities Study Report

for

PJM Generation Interconnection Request

Queue Position X1-096

“Loretto-Kings Creek 138 kV”

July 2014

© PJM Interconnection 2014. All rights reserved. X1-096 Loretto-Kings Creek 138 kV

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Table of Contents

A. Transmission Owner Facilities Study Summary ............................................................................... 3

1. Description of Project ..................................................................................................................... 3

2. Amendments to the System Impact Study or System Impact Study Results ................................. 3

3. Interconnection Customer’s Milestone Schedule ........................................................................... 3

4. Customer’s Scope of Work ............................................................................................................ 3

5. Description of Facilities Included in the Facilities Study (DPL’s Scope of Work) ....................... 5

6. Total Cost of Transmission Owner Facilities Included in the Facilities Study .............................. 5

7. Summary of the Schedule for Completion of Work for the Facilities Study ................................. 6

B. Transmission Owner Facilities Study Results ................................................................................... 7

1. Transmission Lines – New (Attachment Facilities) ....................................................................... 7

2. Transmission Line – Upgrades ....................................................................................................... 7

3. Substation/Switchyard Facilities (Attachment Facilities) .............................................................. 7

4. Upgrades to Substation/Switchyard Facilities ............................................................................... 9

5. Metering & Communications ........................................................................................................ 9

6. Environmental, Real Estate and Permitting Issues ...................................................................... 10

7. Summary of Results of Study ....................................................................................................... 12

8. Schedules and Assumptions ......................................................................................................... 13

9. Other (Light Load Analysis) ........................................................................................................ 14


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A. Transmission Owner Facilities Study Summary

1. Description of Project

Great Bay Wind I, LLC, the Interconnection Customer (IC), has proposed a 150 MWE (19.5 MWC;

150 MW MFO) wind powered generating facility to be located in Somerset County, Maryland. PJM

studied X1-096 as a 150 MW injection into the Delmarva Power and Light (DPL) system at the Kings

Creek 138 kV substation and evaluated the project for compliance with reliability criteria for summer

peak conditions in 2015. The planned in-service date, as originally stated in the Attachment N, is October

10, 2014.

2. Amendments to the System Impact Study or System Impact Study Results

The scope of the project as stated in the revised Impact Study, submitted on April 2013, has remained

relatively unchanged. However, the estimates herein provided were performed in more detail than those

provided in the Impact Study.

The DPL portion of the project is projected to be completed approximately 20-24 months following

an executed Interconnection Service Agreement (ISA) and Construction Service Agreement (CSA). This

is assuming a normal land use and environmental permitting and approval process.

3. Interconnection Customer’s Milestone Schedule

The IC revised the planned in-service date for the X1-096 project to December 31, 2016. The DPL

schedule is supportive of the revised in-service date.

4. Customer’s Scope of Work

The IC proposes the construction of a 150 MWE (19.5 MWC; 150 MW MFO) wind powered

generating facility to be located in Somerset County, Maryland.

The IC assumes full responsibility for design, permitting and construction of all facilities associated

with the X1-096 generating station on their side of the Point of Interconnection (POI.) X1-096 will

interconnect with the Delmarva Power and Light (DPL) transmission system at the existing Kings

Creek 138 kV substation. The Point of Interconnection (POI) will be located at a disconnect switch

just beyond the fence line of the new substation (see Attachment 1).

The IC is responsible for all design and construction related activities on their side of the Point of

Interconnection. Site preparation, including grading and an access road, as necessary, is assumed to be by

the IC. Route selection, line design, right-of-way acquisition and construction of the direct connect

facilities is not included in this report and is the responsibility of the IC. The IC is required to construct a

138 kV breaker, which it will own, no more than 500 feet from the tap point. Information detailing the

interconnection to DPL facilities is outlined in the “Technical Considerations Covering Parallel

Operations of Customer Owned Generation of One (1) Megawatt or Greater and Interconnected with the


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PHI Power Delivery System.” The costs outlined in this study do not include construction of the 138 kV

equipment from the generating facility to the tap structure.

The IC shall also incorporate DPL’s scope of work into their CPCN application for filing as a single

project. DPL will coordinate with the IC to prepare, develop and file the required documentation for the

CPCN.

The IC shall supply adequate, buildable high land with access roads for the installation of the DPL

facilities at no cost to the Company. All applicable permitting, zoning and land use approvals will be

obtained by the developer for DPL’s proposed facilities. DPL will apply for its own building permit for

the facilities within its substation fence.

The IC is responsible for obtaining all rights necessary for their facilities, up to and including any

usage of property in which Pepco Holdings, Inc. may have real property interests. As part of this process,

the IC shall provide, for PHI review, surveyed site plans that delineate their intended facilities, and clearly

define the facilities relationship to existing rights of way and the electrical facilities contained therein.

PHI will provide the IC with the appropriate legal instrument affording the IC the right to use PHI real

property, if necessary, upon review, subsequent approval, and associated compensation.

DPL will require the capability to remotely disconnect the generator from the grid by communication

from its System Operations facility. Such disconnection may be facilitated by a generator breaker, a line

recloser, or other method depending upon the specific circumstances and the evaluation of PHI. The IC is

responsible for construction of single mode fiber optic cable from the generating site to the POI.

Reactive Power and Grid Support Requirements

This section contains setting requirements for the operation of the Interconnection Customer’s

proposed equipment.

The wind turbine selected for this project must have the follow capabilities:

Dynamic VAR response

Ramp rate control

SCADA communications

Curtailment

Low voltage ride through and a configurable frequency ride through

Ability to receive and respond to a transfer trip or SCADA signal

Each individual turbine in the wind generator’s facility shall have the ability to shut down separately

at maximum output to avoid the turbines from shutting down simultaneously due to over speed during

high wind conditions.

The X1-096 generating facility will be required to maintain a power factor at the Point of

Interconnection between 0.95 leading (absorbing VARs) and 0.95 lagging (producing VARs).


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5. Description of Facilities Included in the Facilities Study (DPL’s Scope of Work)

This report describes the electrical interconnection facilities and upgrades to existing DPL facilities

necessary to support the IC’s generation. The IC’s interconnection circuit construction and the IC’s

generation facilities are not included in this study.

Attachment Facilities – PJM Network Upgrade Number n3732 (Substation)

Design and construct a new 138 kV bus position at Kings Creek substation. This substation

expansion will be built to the Company’s (the “Company” referring to ACE, DPL, or

PEPCO) specifications for a transmission substation and be owned and operated by the

Company. An additional 138 kV line terminal, upgraded bus and associated relaying,

communications equipment and a control house will be installed. DPL will obtain the

necessary permitting for all work within the substation fence.

Attachment Facilities – PJM Network Upgrade Number n3733 (Transmission)

Install a self-supporting 138 kV steel structure to accommodate motor operated disconnect

switches and a span to the DPL Kings Creek 138 kV substation.

Upgraded Facilities (DPL Transmission/Telecommunications)

The following work was identified by DPL as required in order to provide with the communication

path necessary for the interconnection of X1-096.

Install OPGW on circuit 13713 Loretto to Kings Creek.

DPL reserves the right to review the electrical protection design and relay settings for interconnecting

customer facilities to ensure that the protective relaying equipment will be compatible with that installed

at the remote substations. DPL personnel must be present at the time of commissioning to witness proper

function of the protection scheme and related coordination.

A three phase 138 kV revenue metering point needs to be established on the IC side of the disconnect

switch at the POI. See Section B.5 of this report for IC’s scope of work.

6. Total Cost of Transmission Owner Facilities Included in the Facilities Study

Item Total Cost

Attachment Facilities $2,096,927

Attachment Facilities with Contingency 15% $2,411,466

Upgrade Facilities $1,439,358

Upgrade Facilities with 15% Contingency $1,655,261


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7. Summary of the Schedule for Completion of Work for the Facilities Study

The overall estimated timeline for this project, including upgrades, is approximately 20-24 months

from the date of the PJM release for design/construction. This timeline may be able to be improved with

preferred system outages.

Attachment Facility Timeframe

Substation Design, Procurement and Construction 20-24 months

Transmission Engineering, Procurement and Construction 20-24 months

Environmental Permitting 18 months

Outside Plant Comm. Design, Procurement and Construction 12-18 months

Metering 6 months

Real Estate 18-24 months


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B. Transmission Owner Facilities Study Results

This section describes facilities identified to be installed (attachment facilities), replaced, and/or

upgraded (upgrade facilities) by DPL to accommodate the project. During detailed design and analysis

other components may be identified for installation or replacement due to this interconnection.

1. Transmission Lines – New (Attachment Facilities)

PJM Network Upgrade Number n3733

New transmission facilities will be designed and constructed to accommodate the new

interconnection as follows:

Steel pole with a drilled pier concrete foundation.

Insulators and associated hardware.

1 138 kV pole mounted disconnect switch with a rating of 2000 amps.

Motor operators and communication devices (RTU).

Multi-vacuum interrupting devices.

Two (2) spans of wire (3 phases each) from the proposed station to the POI.

2. Transmission Line – Upgrades

Upgrade Facilities (DPL Transmission/Telecommunications)-Kings Creek-Loretto OPGW

The installation of OPGW on circuit Loretto to Kings Creek (existing circuit 13713) includes the

following work:

Replace 7.2 miles of the static wire with Optical-Ground Wire (OPGW) on the existing Kings

Creek-Loretto 138 kV line.

Replace approximately 15 structures to accommodate the new OPGW installation (exact

quantity to be determined upon the completion of a detailed structural analysis; the total

structures count is 54).

3. Substation/Switchyard Facilities (Attachment Facilities)

PJM Network Upgrade Number n3732

At Kings Creek Substation, a new circuit breaker (called CB 135) will be installed between

breakers 130 and 131. This results in the IC’s terminal being between CB’s 130 and 135 and AT1

being between CB’s 131 and 135. Additionally, it is necessary to bring the station’s 138 kV bus up to

present standards; this involves removing two (2) dead end wood poles with guy wires, three (3) H-

frame strain bus structures (along with their foundations), and all associated 954 ACSR strain bus and

then replacing all of the strain bus with new rigid bus and structures. Additionally, single phase

voltage transformer “CCP8” is associated with AT1’s schemes and will become separated from

AT1’s bus position once new CB 135 is added, so it is necessary to install CCP8 in a new physical

location. A new switch and switch structure will be needed for the high side of AT1 as well since its

strain bus H-frame (which presently houses its high side disconnect) will be removed. The IC’s


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terminal is assumed to consist of an aerial transmission take-off H-frame structure. A three-phase

bank of CVT’s, a disconnect switch, and a set of surge arresters will be included at this terminal.

The relaying for the IC’s new bus terminal will consist of two sets of differential bus

protection. Additionally, DPL will install a new Orion LX communications processor and Ethernet

switch to support this project. All relaying will be designed and installed per DPL’s standards.

At Kings Creek Substation, the work includes the following items:

One (1) 138 kV, 2000 A, 40 kA circuit breaker

Five (5) 138 kV, 2000 A vertical break disconnect switches

Two (2) 138 kV, 1200 A vertical break disconnect switches with quick-break whips

Four (4) 138 kV class CVT’s

Three (3) 138 kV station class surge arresters

Four (4) low switch stands (steel)

Four (4) high switch stands (steel)

One (1) low 3-phase CVT stand (steel)

One (1) high 1-phase CVT stand (steel)

Two (2) high-low diagonal bus support stands (steel)

Three (3) 3-phase high bus support stands (steel)

Two (2) 3-phase low bus support stands (steel)

Three (3) 1-phase high bus support stands (steel)

One (1) aerial transmission line take-off tower (steel, H-frame)

Lot of 4” SPS aluminum bus, 954 ACSR 45/7 conductor, connectors, insulators, and misc.

hardware

Two (2) breaker control / breaker failure relay panels

One (1) front-line & back-up bus protection panel

One (1) DRTU Panel with Orion LX, Ethernet Switch, and GPS Clock

One (1) new DC Cabinet for the control house

One (1) new AC Cabinet for the control house

One (1) lot of precast cable trench

Lot of secondary control and power cables, meter boxes, junction boxes, yard lights, etc.

Lot of site stone for site restoration after completion of work

Lot of required foundations (drilled piers and slabs)

Lot of required conduit (above and below grade)

Lot of required station ground conductors and connectors (above and below grade)

Removal of existing strain bus (two poles with guys, three H-frame strain structures including

their foundations, and associated conductors)

Reconfiguration of the relay and control schemes associated with AT1 and CB’s 130 and 131 to

accommodate its new connection point between CB’s 131 and 135.

The work required for the substation expansion also includes the following:

Engineering design and drafting, preparation of all plans, layouts, details, schematic and wiring

diagrams, with equipment purchasing and installation specifications


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Field construction management and all other field construction resources

Design of storm water management and erosion and sediment control facilities, with reports

and drawings to be used by the Customer for permitting the site

Clearing/grading of site with installation of roadway, fence, stoning, and storm water and

erosion and sediment control facilities

Testing and commissioning for all new equipment and systems

It is DPL practice to use separate contractors for the installation of foundations, all primary and

relaying work and testing and commissioning.

Drawing Review and Relay Test

DPL will review the IPR cabinet drawing PRIOR TO THE PURCHASE OF EQUIPMENT then test

for proper relay operation after installation of the required protection equipment at IC site.

4. Upgrades to Substation/Switchyard Facilities

No substation upgrade work required for X1-096 other than the work detailed in the

attachments above.

5. Metering & Communications

Metering

A three phase 138 kV revenue metering point needs to be established on the IC’s side of the

disconnect switch at the POI.

The metering instrument transformers will be specified by DPL but all equipment and labor

will be supplied by the IC. The DPL scope would include the programming and installation of the

meters, both primary and backup, and all required wiring work needed to connect the secondary

wiring conductors at the metering enclosure. The materials that the Meter Department provides

would be the meter enclosures, control cable, the meters, the output devices, and miscellaneous

material at the cabinet.

The IC will purchase and install all metering instrument transformers as well as construct a

metering structure per DPL's specifications. The secondary wiring connections at the instrument

transformers will be completed by the interconnection customer's contractors and inspected by

DPL, while the secondary wiring work at the metering enclosure will be completed by DPL's Meter

technicians. The metering control cable and meter cabinets will be supplied by DPL and installed

by the interconnection customer's contractors. DPL's meter technicians will program and install

two solid state multi-function meters (Primary & Backup) for the new metering position. Each

meter will be equipped with load profile, telemetry, and DNP outputs. The IC will be provided

with one meter DNP output.


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The IC will be required to make provisions for a voice quality phone line within approximately

3 feet of each Company metering position to facilitate remote interrogation and data collection.

Telemetry

It is the IC’s responsibility to send the data that PJM and the Company requires directly to PJM.

The IC will grant permission for PJM to send the Company the following telemetry that the

Interconnection Customer sends to PJM: real time MW, MVAR, volts, amperes, generator status,

and interval MWH and MVARH.

6. Environmental, Real Estate and Permitting Issues

Environmental

It can be assumed that this project in entirety would need a CPCN license and/or waiver, which

would be the responsibility of the customer who is designing, route siting, acquiring ROW and

constructing the line to the point of interconnection. DPL would require that the customer include

the new steel pole and span outside of the Kings Creek substation to the point of interconnection in

their CPCN or waiver. The IC would be required to include this work in the CPCN application,

making this a single and complete project covered by one application. DPL Environmental Planning

would take responsibility for any necessary studies for the additional steel pole outside of the

substation and for the environmental permitting covering the work inside the substation.

DPL’s Environmental Planning Department has reviewed the available public sector data for all

of the project areas and the work involved in permitting the projects is as follows:

Wetlands and Water Bodies

• No wetlands or water bodies appear within the transmission study area or substation in public

sector data. It is assumed that the OPGW installation would include several pole

replacements which could potentially affect wetlands and waterways. Field surveys would be

necessary to delineate any wetlands occurring within the overall project area. Tidal and non-

tidal wetlands exist within one (1) mile of the project area. The project area is also within a

mile of Kings Creek, the 100 year flood plain, and it is within the Chesapeake Bay Critical

Area. Since the substation expansion and transmission pole will increase the impervious

cover within 1,000 ft. of a tidal watercourse (Kings Creek), coordination and review by the

Critical Area commission is required. While impact numbers in the Critical Area are

unquantified at this time, it is assumed that all subsequent permitting and possible mitigation

will be necessary at some degree depending on agency consultation. These consultations and

approvals are included in the Cost Estimate below. Potential mitigation costs are unknown at

this time.

Rare, Threatened and Endangered Species


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• Dependent on agency consultation. However, public sector data indicates that there is known

RTE habitat within the project footprint and within the OPGW study area. The project area is

within Maryland Sensitive Species Land and Water. A habitat suitability assessment would

be necessary in the field, along with agency consultation. It is possible that additional

targeted species studies may be required.

Cultural Resources

• Formal agency consultation should occur with regards to cultural resources. Based on public

sector data, the project area may have the following concerns regarding cultural resources: a

National Register of Historic Places property, Maryland Inventory of Historic Properties

within one (1) mile, and a Maryland Historical Trust Preservation Easement is within one (1)

mile of the project. Public sector data also indicates that the project is within one (1) mile of

Chesapeake Forest Lands. A visual effects assessment may be required at an additional cost.

Resource Studies (preliminary list):

• Wetland and waters of the U.S. delineation

• Critical Area Commission Review

• Habitat Suitability Assessment (based on agency consultation)

• Potential Targeted Rare, Threatened and Endangered Species (RTE) Species Surveys (based

on agency consultation)

• Visual Effects Assessment (given presence of NRHP in vicinity)

• Phase 1A Archaeological Assessment (the reconfiguration within new ROW)

• NEPA review (dependent on funding source/Federal stakeholders, etc.)

Real Estate

DPL will research the property rights for the existing transmission circuits ROW and the

specific pole locations and obtain any required road crossing permits and associated work.

The IC is to provide easements into the facility for DPL facilities at no expense to DPL prior to

construction.


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7. Summary of Results of Study

Project Name: X1-096 Loretto- Kings Creek

138 kV Indirect Direct

TOTAL

($) Attachment Facilities n3732– New 138 kV

Position at Kings Creek Substation. Material Labor Material Labor

System Planning

105 1,500 1,605

Project Management & Special Billing

840 12,000 12,840

Outside Plant Communications

14 200 214

System Protection

350 5,000 5,350

Interconnection Arrangements

140 2,000 2,140

System Operations

105 1,500 1,605

Real Estate

350 5,000 5,350

Metering 388.5 210 5,550 3,000 9,149

Environmental Permitting

7490 107,000 114,490

Transmission Engineering & Construction

42 600 642

Substation Engineering & Construction $37,730 $46,100 539,000 922,000 1,544,830

TOTAL COST 38,119 55,746 544,550 1,059,800 1,698,215

15% Contingency 5,718 8,362 81,683 158,970 254,732

GRAND TOTAL 43,836 64,108 626,233 1,218,770 1,952,947

Project Name: X1-096 Loretto- Kings Creek


TOTAL ($) Attachment Facilities n3733– New

Transmission Switch Structure and Tap to

POI

Material Labor Material Labor

System Planning 28

400 428

Project Management & Special Billing 140

2,000 2,140

Outside Plant Communications 105 4683.6 1,500 66,908 73,197

System Protection 35

500 535

Interconnection Arrangements 14

200 214

System Operations 28

400 428

Real Estate 28

400 428

Environmental Permitting 42

600 642

Transmission Engineering & Construction 9,293 11,618 132,755 165,965 319,630

Substation Engineering & Construction 70 1,000 1,070

TOTAL COST 9,398 16,686 134,255 238,373 398,712

15% Contingency 1,410 2,503 20,138 35,756 59,807

GRAND TOTAL 10,808 19,189 154,393 274,129 458,519


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Project Name: X1-096 Loretto-Kings Creek


TOTAL ($)

Upgrade Facilities -Install OPGW on Ckt.

13713 Kings Creek to Loretto. Material Labor Material Labor

System Planning

42

600 642

Project Management & Special Billing

560

8,000 8,560

Outside Plant Communications 2,380 7,322 34,000 104,604 148,306

System Protection

56

800 856

Interconnection Arrangements

14

200 214

System Operations

105

1,500 1,605

Real Estate

700

10,000 10,700

Environmental Permitting

8,540

122,000 130,540

Transmission Engineering & Construction 16,100 58,309 230,000 832,990 1,137,399

Substation Engineering & Construction 35 500 535

TOTAL COST 18,480 75,684 264,000 1,081,194 1,439,358

15% Contingency 2,772 11,353 39,600 162,179 215,904

GRAND TOTAL 21,252 87,036 303,600 1,243,373 1,655,261

Generation projects meeting IRS "Safe Harbor" provisions generally do not incur

"CIAC"(Contribution in Aid to Construction), a tax collected by the utility for the state or federal

government. DPL does not expect to collect CIAC for this project. If for any reason, "CIAC" would be

required for this project, it would be the responsibility of the party owning the generator to pay this cost.

DPL reserves the right to charge the Interconnection Customer operation and maintenance expenses

to maintain the Interconnection Customer attachment facilities, including metering facilities, owned by

DPL.

8. Schedules and Assumptions

The DPL schedule is based on a 20-24 months lead-time from start of engineering to in-service date,

including the assumption that it would not be impacted by storm damage and restoration, time of year

limitations, permitting issues, outage scheduling, system emergencies, and contractor and equipment

availability.

It is important to note that this project will be incorporated into the existing project work load at DPL

at the time of contract execution. If the workload of existing projects is extensive, resource constraints

may cause this project to be delayed beyond the projected in-service date.


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9. Other (Light Load Analysis)

Light Load analysis has been completed and no violations were found.


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ATTACHMENT 1

X1 – 096

Kings Creek 138 kV

Pocomoke

138kV

Loretto

138kV

AT1

138/69kV

134

133130

NEW

131

132

T1

25kV

T2

25kV

Meter owned

By DPLPOI M

X1 - 096

If location of generator is

greater than 500 feet

from substation,

additional developer

circuit breaker will be

required.

DPL

Interconnection

Customer

POI Point of Interconnection

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