LOCAL SYSTEM PLAN - 2014 · Point of Delivery Requests from customers ... Add a new 115/13.2 kV...

LOCAL SYSTEM PLAN - 2014 Presented at the ISO-NE Local System Plan Meeting October 22, 2014

The NU (Northeast Utilities) LSP (Local System Plan) has been revised to incorporate the latest proposed changes to the NU Local transmission system for CL&P, NSTAR, PSNH, and WMECO.

The LSP Project List is a cumulative listing of proposed

transmission solutions intended to meet local needs. This LSP-2014 supersedes NU’s LSP-2013.

Update to NU LSP for 2014

1

Per Attachment K – Local, the LSP:

Describes projected improvements to non-PTF (non-Pool Transmission Facilities) that are needed to maintain system reliability

Reflects:

Local Needs Assessments

Corresponding transmission system plans and future studies

Maps indicating project locations

Identifies:

Local Planning Process

Criteria, Data, and Assumptions used in the Local System Planning Process

Purpose of Local System Plan

2

ISO-NE posts the materials on the PAC web page prior to the meeting.

PAC, Transmission Customers, and other Stakeholders have 30 days after the meeting to provide any written comments for consideration by Northeast Utilities.

Comments to be directed to:

Robert P. Clarke Director, Transmission Business Operations Northeast Utilities One NSTAR Way, SE320 Westwood, MA 02090-9230 Phone: 781-441-8057 email: [email protected]

LSP Communication

3

Each PTO (Participating Transmission Owner) is individually responsible for publicly posting and updating the status of its respective LSP and transmission project list on their website in a format similar to the ISO-NE Regional System Plan Project List (RSP).

Northeast Utilities’ project lists are located at:

http://www.transmission-nu.com/business/ferc890postings.asp

… and on the NSTAR web site at:

http://www.nstar.com/business/rates tariffs/open access/

LSP Communication (cont.)

4




http://www.nstar.com/business/rates_tariffs/open_access/




Local studies can result from:

Load growth

Area reliability assessments

Point of Delivery Requests from customers

Other efforts that may impact local facilities (e.g., elective transmission upgrades, reliability transmission upgrades, generator interconnections, short circuit or temporary overvoltage studies)

The Local System Plan:

Summarizes the needs

Summarizes the selection of preferred solution

Includes Local Projects that are related to projects listed in the RSP

Local System Planning Process

5

All Northeast Utilities local transmission facilities (69-kV and above) are part of the interconnected Northeast Utilities system and shall be designed in accordance with criteria described in the Northeast Utilities and NSTAR Transmission Reliability Guidelines.

Northeast Utilities complies with NERC, NPCC, and ISO-NE planning criteria.

The annual ISO-NE CELT Report forecasts for the New England area (90/10) load, with appropriate municipal customer forecasts and/or sub-area forecasts, are used.

Studies use the ISO-NE provided base cases and the ISO-NE short circuit database.

Criteria and Assumptions

6

This Local System Plan includes the following types of

Transmission System connections

NU has distribution connections and radial transmission connections.

Specific Transmission projects may be categorized as LSP or RSP, or may

contain both regional and local facilities.

PTF elements are included in the RSP.

Radial Connection

to PTF

Distribution

Connection to PTF

PTF

Non-PTF

Distribution 115-kV

bus

115-kV

Non-PTF

Substation

(illustrative examples)

7

Large-scale reliability assessments may ultimately have Local ramifications. Assessment studies are described in the ISO-NE RSP. Several longer-term assessments have been completed, and others are being conducted. Information about studies being conducted that may affect the local system can be found in the ISO-NE 2014 RSP:*

New Hampshire, RSP section 5.4.1

Connecticut, RSP section 5.4.2

Eastern Massachusetts, RSP section 5.4.2

Western Massachusetts, RSP section 5.4.2 * Public Meeting Draft 2014 Regional System Plan posted on August 29, 2014.

NH, MA, and CT Projects in Regional

System Plan

8

The LSP Project List is a cumulative listing of proposed transmission solutions intended to meet LSP needs.

The LSP Project List includes the status of each Non-Pool Transmission Facility (Non-PTF project). Non-PTF costs are provided for Proposed, Planned, Under Construction, and In Service categories of projects, using the same guidelines as the various stages of RSP projects. Some projects may have Non-PTF costs yet to be determined.

Concept - Project is under consideration as a possible solution but the needs assessment is not yet completed. Costs not known.

Proposed – Needs assessment completed and project proposed as the solution, but Proposed Plan Application (PPA) not yet filed.

Planned - PPA has been filed and approved by ISO-NE.

Under Construction - Final engineering and internal approvals completed and project being implemented.

In Service - Project completed.

LSP Project List

9

NU Service Territories

NU operates in three states:

NH, MA, and CT

10

Connecticut Projects

Norwalk

Transformer

Bulls Bridge

Transformer

Newtown

Substation

Greenwich

115/13.2

Substation

11

Local System Plan – Connecticut: CL&P

Status of project descriptors in blue have changed from previous LSP or are newly listed

* There are no Non-PTF costs for this project 12

Northeast Utilities Local Area Transmission Facilities Projects - CT (CL&P)

Need

Projected ISD

Month/Year;

Non-PTF Est.

Cost Project Area Project Status Solutions

Load Growth May-14 *Norwalk/

Stamford

Norwalk substation - add a 3rd 115/13.2-kV

transformer (60 MVA) (Norwalk)In Service

Adding a third transformer to increase the capacity of the

substation.

Load Growth

and Reliability2017

Norwalk/

Stamford

Greenwich 115/13.2-kV Substation Project

(Greenwich) Planned

Add a new 115/13.2 kV bulk power substation in the

Greenwich area and two new 115-kV lines from Cos Cob to

Greenwich.

Load Growth 2017 * Southwest Newtown Substation (Newtown) PlannedReplace two existing transformers (28 & 30 MVA) with 60

MVA transformers.

Load Growth May-15 * SouthwestBulls Bridge substation – Add 27.6-kV Capacity

(New Milford)Proposed

Replace the existing 115/27.4 kV transformer with a new

dual voltage transformer

Load growth May-16 SouthwestCanal substation - add 115/23-kV transformer and

add a 115-kV breaker (Southington)Concept Add a second transformer of 47 MVA

Load growth Dec-16 EasternTracy substation - add 115/23-kV transformer and

add a 115-kV breaker (Putnam)Concept

Add a third transformer of 47 MVA and two 115-kV circuit

breakers.

Load Growth 2018Greater

HartfordScitico Substation (Enfield) Concept Add a third transformer (60 MVA) to the substation.

Load Growth

and Reliability2019 Northwest Burrville Substation (Torrington) Concept

Add a new 115/23-kV bulk power substation in the

Torrington area.

Eastern Massachusetts Projects

Hyannis Jct Falmouth

Acushnet – Pine

Street

Barnstable –

Harwich Tap

Harwich Tap –

Harwich Bulk

BOSTON SUB

AREA Hopkinton

Transformer

Canton

Transformer

Dover

Transformer

Wing Lane

Substation

Mashpee

Substation

Valley

Substation

Newton Highlands

Substation

and Reliability

Improvement

K-St to Dewar/

Andrew Sq

Somerville

Transformer

Saxonville

Mobile Station

Sudbury

Reactors

13

Local System Plan – NSTAR


14

Need

Projected ISD

Month/Year;

Non-PTF Est.


ReliabilityDec-13

$10.5MSEMA Replace Transformers at Canton Station 470 In Service

Replace transformers 110 A, 110B and 110C at Canton

Station 470

Load Growth

Reliability

June-14

$26.9M

NEMA/

Boston

Newton Transmission Reliability Improvement

ProjectIn Service

Install oil return line to increase cooling for two pipe type

cable circuits between Baker Street and Newton

Load GrowthJun-14

$5M

NEMA /

Boston Dover Transformer 110B upgrade In Service Upgrade transformer 110B to a 65.4 MVA unit

Load GrowthJun-14

$747K

NEMA

/BostonInstall Mobile Station at Saxonville Station 278 In Service

Tap line 342-507 at ROW 8-1 in Framingham, to connect a

mobile transformer and provide temporary local area

substation relief of 10 to 20 MVA

Load GrowthJan-14

$8.6MSEMA

Upgrade the 107W line from Falmouth Tap to

Falmouth Bulk SubstationsIn Service Upgrade ~5 miles of line to increased capacity.

Load Growth/

Reliability

Dec-14

$2.7MSEMA

Upgrade the capacity of the 119 line from Harwich

Tap to Harwich Bulk Substations

Under

ConstructionUpgrade ~4.5 miles of line to increase capacity.

Load GrowthJun-15

$16.2MSEMA Hyannis Junction Substation Upgrade

Under

Construction

Triple-End Hyannis Junction with 3rd 115/23kV 30/40/50

MVA transformer bank and reconductor line 123

Load Growth/

Reliability

Jun-15

$7MSEMA Wing Lane Substation Double Ending

Under

Construction

Double-End Wing Lane Substation with 2nd 24/32/40 MVA

115/13.2kV bank. Reconfigure lateral #112 line to Arsene

Street with a ABB Pass MO 2-breaker auto throw over

scheme.

Northeast Utilities Local Area Transmission Facilities Project Listing - MA (NSTAR)

Local System Plan – NSTAR (continued)



Need

Projected ISD

Month/Year;

Non-PTF Est.


ReliabilityDec-15

$15.9MSEMA Acushnet - Pine St Upgrades

Under

Construction

Add breakers and reconfigure both Acushnet and Pine

Street Substations.

ReliabilityDec-15

$3.6MSEMA Pine St. upgrade

Under

ConstructionAdd 2 (10 MVAR) Reactors at Pine St.

Load Growth

Reliability

Jun-15

$7.9MSEMA Mashpee Substation Double Ending Planned

Double-End Mashpee Substation with 2nd 30/40/50 MVA

115/23-kV transformer bank.

Load Growth/

Reliability

Dec-15

$20.2M

NEMA

/BostonK-St to Dewar/ Andrew Sq Cable Project Planned

Install two 1-mile HPFF UG cables from K St to manhole on

Day Blvd and split wye splices. Reconfigure K St bus.

Load Growth/

Reliability

Dec-17

$19MSEMA New 115-kV Line from Barnstable to Harwich Tap Planned

Build a new 7.8 mile 115-kV line from Barnstable to Harwich

Tap, remove one line from the DCT to increase the capacity

of both transmission lines.

Load GrowthJun-15

$1.73MSEMA Install 3rd Transformer at Hopkinton Station 126 Proposed

Add prefab 115 kV breaker/switch assembly and 3rd

Transformer

Load GrowthJun-15

$1.44M

NEMA

/BostonSomerville Transformer 110A upgrade Proposed Upgrade transformer 110A to a 65.4 MVA unit

ReliabilityJun -15

$4.5M

NEMA

/BostonSudbury Reactors Proposed

Add 2 (20MVAR) 115kV reactors at Sudbury for light load

voltage control




16

Need

Projected ISD

Month/Year;

Non-PTF Est.


Load

Growth/Reliability/

Generation

Interconnection

Jun-15 *-

June-16SEMA Valley Substation Upgrade (2 year project) Proposed

Upgrade Valley Substation to two (2) 115/23kV 30/40/50

MVA transformer banks

Load Growth

Reliability

Jun-19

$30M

NEMA/

Boston

New Substation proposed to improve Newton

Highlands CapacityProposed

Construct a new substation, with new transmission line

supplies in the area.

Reliability Dec-16 SEMA 230/115-kV Transformer at Medway Substation ConceptAdd a 115/230-kV auto transformer at Medway Substation

for use under extreme operating conditions

Load Growth

ReliabilityDec-16 SEMA 2nd 115-kV Line from Duxbury to Marshfield Concept

Install 2nd 115-kV transmission line running 2.3 miles from

Duxbury substation to Marshfield Substation

Load Growth Dec-16NEMA

/BostonMaynard - Concord Supply Upgrade Concept

1) Install a third cable from Sudbury to Maynard.

2) Install oil return piping and cooling equipment for

increased capacity from the existing cables.

Load Growth 2016-2017NEMA

/BostonSherborn - Transformer & Switchgear upgrades Concept

Upgrade both 40 MVA transformers to 65.4 MVA

transformers

Load Growth/

ReliabilityJun-17 SEMA Falmouth Tap Switching Station Upgrade Concept

Upgrade Falmouth Tap Switching Station from a 1-breaker

series bus arrangement to a 115kV breaker and a half

scheme. Install a 115/23kV bulk distribution station with one

30/40/50 MVA transformer to address area load growth

Load Growth/

ReliabilityDec-17 SEMA 115-kV line from Orleans to Wellfleet Concept

1) Install a 2nd 115-kV transmission line.

2) Construct additional distribution circuit backup.




17

Need

Projected ISD

Month/Year;

Non-PTF Est.


Load Growth/

ReliabilityDec-17 SEMA

Fisher Road Supply Upgrade, 115-kV 4.4 miles

line from Cross Road to Fisher Road.Concept

1) Install a 2nd 115-kV transmission line.

2) Construct additional distribution circuit backup.

Load Growth 2017 SEMA Wellfleet - Transformer upgrades ConceptReplace 16/21/26 MVA transformers with 30/40/50 MVA

transformers

Load Growth 2018 SEMA Rochester Substation - Transformer upgrade ConceptReplace #114 10/12.5 MVA transformer with 12/16/20 MVA

transformer using spare transformer

Load Growth 2018 SEMA Tremont Substation - Transformer upgrade ConceptReplace #114 12/16/20 MVA transformer with 15/20/25 [28]

transformer using the spare removed from Valley Substation

Load Growth 2019-2020 SEMA Double Ending Oak Street Substation ConceptDouble Ending Oak Street Substation with 2nd 30/40/50

MVA bank and 23-kV bus section

Load Growth TBD NEMA Framingham - Install 3rd Transformer Concept Install a 3rd 65.4 MVA transformer

Load Growth TBD NEMA Maynard - Transformer upgrades Concept Upgrade both transformers to 65.4 MVA


Western Massachusetts Projects

Southwick

Transformer

UMass/Amherst

Orchard

Transformer

18

Local System Plan – Massachusetts: WMECo



Northeast Utilities Local Area Transmission Facilities Project Listing - MA (WMECo)

Need

Projected ISD

Month/Year;

Non-PTF Est.


Load Growth

and ReliabilityJun-15 * Springfield Southwick Substation transformer (Southwick)

Under

Construction

Replace the second transformer as part of the Southwick

transformer (1X) replacement project.

Load Growth

and ReliabilityApr-15 * Springfield Orchard Substation third transformer (Springfield) Planned Install third 115/13.8-kV 30MVA transformer in existing bay

Load Growth

and Reliability

Sep-15

$14.5MHadley UMASS-Amherst new substation (Tilson Farm) Planned

UMASS-Amherst will be constructing/owning/operating a new

115/13.8-kv substation with two 55 MVA transformers and a

circuit switcher at Amherst.

Load Growth

and ReliabilityDec-15 Springfield Clinton Substation 2X transformer (Springfield) Proposed

Replace existing Clinton 115/13.8 kV 2X transformer with

larger transformer

Load Growth

and ReliabilityDec-16 Springfield

Breckwood Substation transformer and

switchgear upgrade (Springfield)Concept

Replace existing Breckwood 115/13.8 kV 1X transformer with

larger transformer

Load Growth

and ReliabilityDec-16 Hadley

Gunn Substation transformer upgrade

(Easthampton)Concept

Replace existing Gunn 115/13.8 kV 2X transformer with larger

transformer

Load Growth

and ReliabilityJun-17 Springfield

Breckwood Substation transformer and

switchgear upgrade (Springfield)Concept


larger transformer

Reliability Jun-17 SpringfieldWest Springfield 8C Substation transmission

asset replacement (West Springfield)Concept Evaluation on-going

Local System Plan – WMECo (continued)


20

Northeast Utilities Local Area Transmission Facilities Project Listing - MA (WMECo)

Need

Projected ISD

Month/Year;

Non-PTF Est.


Load Growth

and ReliabilityJun-17 Greenfield

Montague Substation transformer upgrade

(Montague)Concept

Replace the existing Montague 115/13.8 kV 4X transformer

with a larger transformer

Load Growth


Breckwood Substation transformer upgrade

(Springfield)Concept


larger transformer

Load Growth

and ReliabilityDec-17 Greenfield

Montague Substation transformer upgrade

(Montague)Concept

Replace the existing Montague 115/13.8 kV 3X transformer

with a larger transformer

Load Growth


Clinton Substation 1X transformer upgrade

(Springfield)Concept


larger transformer

Load Growth

and ReliabilityDec-18 Greenfield

Cumberland Substation transformer upgrade

(Greenfield)Concept

Replace existing Cumberland 2X transformer with larger

transformer

Load Growth

and ReliabilityDec-18 Pittsfield

Doreen Substation transformer upgrade

(Pittsfield)Concept

Replace exisitng Doreen 1X transformer with larger

transformer

Load Growth


Clinton Substation 3X transformer and switchgear

upgrade (Springfield)Concept


larger transformer

Load Growth

and ReliabilityDec-19 Hadley

Gunn Substation transformer upgrade

(Easthampton)Concept

Replace existing Gunn 115/13.8 kV 1X transformer with larger

transformer

New Hampshire Projects

Rochester/Eastport

Kingston Area Peaslee

Switching Station

Tasker Farm

Mill Pond Substation

(Portsmouth)

21

Local System Plan – New Hampshire: PSNH


22

Northeast Utilities Local Area Transmission Facilities Project Listing - NH (PSNH)

Need

Projected ISD

Month/Year;

Non-PTF Est.

Cost

Project

Area

division Project Status Solutions

Load Growth

Jun-14

$12.6M Seacoast

Construct a new 115/34.5 kV substation (Tasker

Farm Substation) with a 44.5 MVA transformer in

North Rochester.

In Service

The new distribution substation will be supplied by a new

Transmission line. Distribution infrastructure upgrades will

serve local load growth and provide reliability of service.

Load Growth

and Reliability

Jun-16

$0.1M Western

Build a new distribution substation in the North

Keene area which taps an existing transmission

line

Proposed

Install a 115/12.47-kV transformer at a new distribution

substation, to be supplied by an existing Transmission line.

Distribution infrastructure upgrades will serve local load

growth and provide reliability of service.

Load Growth

and Reliability

Jun-16Southern

Install a second 115/34.5-kV transformer at the

existing Rimmon substationConcept

The existing distribution substation is supplied directly from

the Transmission line (J114). Addition of a 2nd distribution

transformer will require construction of a Transmission

substation. Infrastructure upgrades will serve local load

growth and provide reliability of service

Obsolete

EquipmentJun-17 Southern

Retire existing 115/34.5 kV transformer at Greggs

substationConcept

Remove the 115/34.5-kV transformer and associated 34.5-

kV equipment at the existing Greggs substation. The 115-

kV substation will remain in service

Local System Plan – PSNH (continued)


23

Northeast Utilities Local Area Transmission Facilities Project Listing - NH (PSNH)

Need

Projected ISD

Month/Year;

Non-PTF Est.

Cost

Project

Area

division Project Status Solutions

Load GrowthJun-17

SouthernBuild a new Broken Ground/Curtisville Substation

(Concord)Concept

The new Unitil distribution substation (Broken Ground) will

be supplied by existing 115-kV Transmission lines (P145

and V182), Curtisville. The project will offload PSNH's

Garvins and Oak Hill substations.

Load Growth /

Obsolete

Equipment

Jun-17Northern

Webster substation - replace all transformers with

2, 115/34.5, 44.8 MVA transformersConcept

Replace the existing three 115/34.5-kV, 20 MVA

transformers at Webster substation with two 115/34.5-kV,

44.8 MVA transformers.

Load GrowthJun-17

Northern

White Lake substation - Replace one of the

existing 28 MVA transformer with a 44.8 MVA

transformer

Concept

Replace one of the existing 115/34.5-kV, 28 MVA

transformer at White Lake substation with a new 115/34.5-

kV, 44.8 MVA transformer.

The projects listed below are associated with PTF projects listed in the ISO-NE RSP project list. The RSP Project ID is shown in parentheses.

Local Projects Included in the Regional System Plan

24

Northeast Utilities Local Area Transmission Facilities Project Listing - Projects in Regional System Plan

Need

Projected ISD

Month/Year

Project

Area Project Status Needs Assessment Solutions

Load Growth May-14Southwest

(CL&P)

Add 4th transformer at South End

SubstationIn Service

Fourth step-down transformer required to

support load

Expand South End Substation to handle customer

demands in downtown Stamford. This project is

associated with a PTF project listed in the ISO-NE

RSP project list. (1227).

Load Growth Jun-14Seacoast

(PSNH)Rochester Area Project (Eastport) In Service

The Dover/Rochester area has projected load

growth. (Part of Deerfield Autotransformer

project)

Build a new 6.9 mile radial 115-kV line from

Rochester/Eastport to new Tasker Farm

Distribution Substation. This project is associated

with a PTF project listed in the ISO-NE RSP project

list. (1141).


(PSNH)

Construct a new 115/12.5-kV distribution

substation (Mill Pond Substation) in the

Portsmouth area.

Under

Construction

Potential overloads in the Portsmouth area of

New Hampshire and provide operational

flexibility to the distribution system

The new Distribution substation transformer will be

supplied by tapping existing Transmission lines.

Distribution infrastructure upgrades will serve local

load growth and provide reliability of service.This

project is associated with a PTF project listed in the

ISO-NE RSP project list. (1557)


(PSNH)

New 115-kV Switching Station, to be

called Peaslee. From Peaslee construct

new 115-kV lines.

PlannedNeeded for Unitil 34.5-kV system load growth

and PSNH design criteria.

Construct a new 115-kV Switching Station.

Construct a new 5.5-mile 115-kV line from existing

Kingston Tap to the new switching station.

Construct two lines to Unitil 115/34.5-kV Substation

(two 60 MVA transformers). This project is

associated with a PTF project listed in the ISO-NE

RSP project list. (1183).

Load growth may require a third transformer (60 MVA) at the North Bloomfield Substation

Load growth may require a second transformer at the Carmel Hill Substation

Future Studies: Connecticut

25

Future Studies: Massachusetts

Load growth and reliability needs may require voltage

conversion of Midway 19B from 13.8 kV delta to 13.8 kV

grounded wye, or 23 kV grounded wye

Load growth and reliability needs may require Transmission to

be extended into Hannon (a new substation) in the City of

Springfield

Load growth and reliability needs may require adding a 13.8

kV transformer for distribution at South Agawam 42E

26

Future Studies: New Hampshire

Load growth may require a second transformer at Portsmouth

Substation

Load growth may require replacing the Pemigewasset

transformer with a larger transformer

Load growth may require a new substation in the

Dover/Madbury area

27

Please provide any written comments for consideration by

November 22, 2014 (as defined in the ISO-NE Open

Access Transmission Tariff Section II – Attachment K

Appendix 1 [Attachment K – Local], section 1.4).

Robert P. Clarke

Director, Transmission Business Operations

Northeast Utilities

One NSTAR Way, SE320

Westwood, MA 02090-9230

Phone: 781-441-8057

email: [email protected]

28

Thank you for participating in the NU LSP Presentation.

Questions?

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LOCAL SYSTEM PLAN - 2014 · Point of Delivery Requests from customers ... Add a new 115/13.2 kV...

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