Regional System Plan Transmission Projects June 2015 Update · 2018. 1. 19. · Regional System...

Regional System Plan Transmission Projects June 2015 Update

J U N E 1 7 , 2 0 1 5 | W E S T B O R O U G H , M A

Brent Oberlin

D I R E C T O R , T R A N S M I S S I O N P L A N N I N G

Planning Advisory Committee Meeting

Table of Contents

Slide

• Highlights 3 - 4

• June 2015 Changes 5 – 19

• Status of Major Transmission Projects 20 – 21

• Appendix 22 – 28

2

Highlights • Major cost estimate changes that occurred between the March 2015 and June 2015 project list:

– (ME) MPRP –cost modifications were made to adjust for contingency and risk reassessment, Lewiston Loop scope adjustments and contract commitment residual balances (decreased $10.0M)

– (NH) New Hampshire Solution - Early estimate did not properly reflect field conditions and route complications (increased by $34.0M)

– (MA) Greater Boston – Costs added for previous TBDs (Install a new +/- 200 MVAR STATCOM at Coopers Mills 345 kV Substation and add a new 115 kV breaker in series with breaker 5 at Framingham) (increased $63.0M)

– (MA) Pittsfield/Greenfield Project – 4 new project added (see new projects) (increased $61.0M)

• Greater Rhode Island Transmission Reinforcements (including Advanced NEEWS) Eight projects cancelled. These projects will be replaced by solutions as part of the ongoing SEMA/RI study

process

• 13 new projects were added to the Project List since the March 2015 update (MA) Pittsfield/Greenfield Project – 4 new projects were added

• Doreen Substation – install a 115 kV 20.6 MVAR capacitor and operate the 115 kV 13T breaker Normally Open • Construct a new 3 breaker ring bus at the Pochassic 37R Substation with a new line connecting the Buck Pond 115 kV Substation • Northfield Substation - install a 75-150 MVAR variable reactor • Ludlow Substation - install a 75-150 MVAR variable reactor

(RI) Aquidneck Island Reliability Project – 3 new projects were added • Jepson Substation – Convert from 69 kV to 115 kV • Dexter Substation – remove 115/69 kV transformer • Convert lines 61/62 from 69 kV to 115 kV

(MA) Greater Boston – Western Suburbs – Build a new 115 kV line from Sudbury Station 342 Substation to Hudson Substation. (Hudson Light & Power portion of the line and terminal work)

(MA) Rebuild 115 kV lines from Sharon – Dean St. Substation in Norwood (CT) Greater Hartford Central Connecticut (GHCC) - Increase the size of the existing 115 kV capacitor at Branford Substation from

37.8 to 50.4 MVAR (NH) 2 – LSP projects: North Keene Substation and Rimmon Substation (MA) Install one 115 kV breaker in series with existing Acushnet Sub EW22 breaker

3

MVAR - megavolt-amperes reactive BPS – Bulk Power System LSP – Local System Plan

Highlights, cont.

• 23 upgrades on the project list have been placed in-service since the March 2015 update (ME) MPRP – 13 projects were placed in-service during this period:

• Addition of 2 new 345 kV lines - 3024 and 3025 • Addition of 1 new 115 kV line - 254 • Addition of 2 new 345/115 kV substations - Albion Road and Coopers Mills • Expansion of the 345/115 kV Orrington Substation • Removal of 4 SPS - Maine Yankee Double Circuit Tower SPS, Orrington T1 SPS, Bucksport 65/205 Reverse Power SPS and Maxcys – Bucksport SPS • Modification of Maritimes Islanding SPS to remove inputs from the New England Transmission system • Installation of two new 40 MVAR 13.8 kV reactors at Coopers Mills

(RI) New Highland Park Substation – Bus upgrades at Riverside Substation (MA) NEEWS – West Medway – new 345 kV series breaker added to existing 106 breaker (MA) A127/B128 Conductor Refurbishment 2 projects – Projects completed (MA) New Centech Substation 2 projects – Projects completed (MA) Pittsfield/Greenfield – Reconductoring of A127 between Erving and Cabot Tap (NH) Southern New Hampshire Solution – 2 projects completed (VT) VELCO – LSP – Georgia Substation – Install 115/34.5 kV transformer

4

TRV – Transient Recovery Voltage

June 2015 Changes

5

13 New Projects and Corresponding Need

Project ID #

Transmission System Upgrades Cost

(in millions) Improvement/Need

1659

Increase the size of the existing 115 kV capacitor at Branford Substation from 37.8 to 50.4 MVAR (Connecticut) Greater Hartford Central Connecticut (GHCC)

0.7

Resolves low voltage violations

1660

Replace four of the existing transformers at Keene Substation with one 115/12.47 kV 30 MVA transformer; Construct a N. Keene Substation, loop in the L163 line with two 115 kV breakers, install one 115/12.47 kV 30 MVA transformer (New Hampshire) LSP-North Keene Substation Project

10.0

Increase load serving capability in the Keene area

1661

Rebuild Rimmon substation and add three 115 kV breakers, install a 2nd 115/34.5 kV transformer and two 115 kV 13.3 MVAR capacitors, connect the Rimmon Substation to the J114 line; install a series 115 kV breaker at Greggs Substation (New Hampshire) LSP-Rimmon Substation Project

15.5

Increase load serving capability in the Rimmon area

1662

Install a 115 kV 20.6 MVAR capacitor at Doreen Substation and operate the 115kV 13T breaker N.O. (Massachusetts) Pittsfield/Greenfield Project

4.1

Resolves low voltage violations in the Pittsfield/Greenfield area

N.O. – Normally Open MVAR - megavolt-amperes reactive MVA - megavolt-ampere Does not include concept projects

June 2015 Changes, cont.

6


Project ID #



1663

Construct a 115 kV three breaker ring bus at or adjacent to Pochassic 37R Substation, loop line 1512-1 into the new three breaker ring bus, construct a new line connecting the new three breaker ring bus to the Buck Pond 115 kV Substation on the vacant side of the double circuit towers that carry line 1302-2, add a new breaker to the Buck Pond 115-kV straight bus and reconnect lines 1302-2, 1657-2 and transformer 2X into new positions (Massachusetts) Pittsfield/Greenfield Project

39.6

Resolves low voltage violations in the Pleasant/Blandford/Southwick/Elm area

1664

Install a 75-150 MVAR variable reactor at Northfield Substation (Massachusetts) Pittsfield/Greenfield Project

14.4

Resolves high voltage violations in the Pittsfield/Greenfield area

1665

Install a 75-150 MVAR variable reactor at Ludlow Substation (Massachusetts) Pittsfield/Greenfield Project

10.8

Resolves high voltage violations in the Pittsfield/Greenfield area

1666

Install one 115 kV breaker in series with existing Acushnet Substation EW22 breaker (Massachusetts) Acushnet to Pine St. Reliability Project

0.5

Increase system reliability in Acushnet and New Bedford, MA area

Does not include concept projects


7


Project ID #



1668

Rebuild 115 kV lines 447-508 and 447-509 from the Eversource tap in Sharon to Dean St. #496 Substation in Norwood (Massachusetts)

12.7

Resolve thermal overloads

1669

Conversion of Jepson 69 kV Substation to 115 kV substation (Rhode Island) Aquidneck Island Reliability Project

9.5

Increase system reliability in Newport, RI area

1670

Remove 115 kV to 69 kV transformer at Dexter Substation (Rhode Island) Aquidneck Island Reliability Project

3.0


1671

Convert lines 61/62 from 69 kV to 115 kV (Rhode Island) Aquidneck Island Reliability Project

22.1


1672

Build a new 115 kV line from Sudbury Substation to Hudson Substation. (This is the HLP portion of the line and terminal work) (Massachusetts) Greater Boston – Western Suburbs

5.0

Increase the load serving capability of the Western Suburbs of Boston

Does not include concept projects


8

23 Projects Placed In-Service and Corresponding Needs

Project ID #



1492 Bus upgrades at Riverside Substation (J16) (Rhode Island) New Highland Park Substation Project

0.3 New Substation to increase load serving capability in Rhode Island

1187 A127/B128 Conductor Refurbishment - Tower 510 to Harriman Substation, VT (Massachusetts) A127/B128 Conductor Refurbishment

78.0


940 Reconductor sections of A127W line w/477 ACSS (A127 West reconductoring. Tower 510 to Paxton, Wendell Depot to Cabot Tap). (Massachusetts) A127/B128 Conductor Refurbishment

Part of RSP 1187 ($78.0)


1209 Reconductoring of A127 between Erving and Cabot Tap with 2-477 ACCR includes switch replacements at Wendell Depot (Massachusetts) Pittsfield / Greenfield Project

7.2 Resolve thermal overloads

1342 Add a new 345 kV series breaker to the existing 106 breaker at West Medway (Massachusetts) NEEWS

3.2

Eliminate critical contingency causing thermal violations


9


Project ID #



1494 Add a new 115/13.8 kV Centech Substation by looping the E157 W line in and out of this new substation. (NGRID) (Massachusetts) New Centech Substation

0.6 Add a new substation to address load growth

1505 Add a new 115/13.8 kV Centech Substation by looping the E157 W line in and out of this new substation. (SELD) (Massachusetts) New Centech Substation

2.1 Add a new substation to address load growth

1307 Uprate 115 kV line G146, Garvins-Deerfield (New Hampshire) Southern New Hampshire Solution

2.4 Resolve thermal overload

1306 Rebuild 115 kV line K165, W157 tap (H123 renamed) - Eagle-Power St. (New Hampshire) Southern New Hampshire Solution

5.4 Resolve thermal overload

1290 Install a 115/34.5 kV transformer at the Georgia Substation (Vermont) VELCO-LSP - Georgia Substation

0 Increase load serving capability in Vermont

1402

Add a new 345 kV transmission line (3024) between Albion Rd and Coopers Mills (Maine) Maine Power Reliability Program (MPRP)

Part of RSP 1411 ($1,369.0)

Increase load serving capability in Maine


10


Project ID #



1403 Add a new 345 kV transmission line (3025) between Coopers Mills and Larrabee Road (Maine) Maine Power Reliability Program (MPRP)

Part of RSP 1411 ($1,369.0)


1408 Add a new 115 kV transmission line (254) between Orrington and Coopers Mills (Maine) Maine Power Reliability Program (MPRP)

Part of RSP 1411 ($1,369.0)


1426

Replace the existing T3 autotransformer at Maxcys with the new Coopers Mills 345/115 kV autotransformer #1 at the new Coopers Mills Substation (Maine) Maine Power Reliability Program (MPRP)

Part of RSP 1411 ($1,369.0)


1429

Expand the 345/115 kV Orrington Substation to interconnect the new 3023 345 kV line to Albion Road and the new 254 115kV line to Coopers Mills (Maine) Maine Power Reliability Program (MPRP)

Part of RSP 1411 ($1,369.0)


1432

Add new Albion Road 345/115 kV Substation interconnecting lines 3023, 3024, 67, 254, 257 and 258 between substations Orrington, Coopers Mills and Detroit (Maine) Maine Power Reliability Program (MPRP)

Part of RSP 1411 ($1,369.0)



11


Project ID #



1433

Add a new Coopers Mills 345/115 kV Substation interconnecting lines 3024, 3025, 60, 254, 257 and 258 between substations Albion Road, Larrabee Road and Browns Crossing (Maine) Maine Power Reliability Program (MPRP)

Part of RSP 1411 ($1,369.0)


1461

Install two new 40 MVAR 13.8 kV reactors on the tertiary of 345/115/13.8 autotransformer at Coopers Mills 345/115 kV Substation (formerly Maxcys) (Maine) Maine Power Reliability Program (MPRP)

Part of RSP 1411 ($1,369.0)


1463 Remove the Maxcys-Bucksport (NPCC # 178 – Type I) Special Protection System (Maine) Maine Power Reliability Program (MPRP)

Part of RSP 1411 ($1,369.0)


1464 Remove the Maine Yankee Double Circuit Tower SPS, (NPCC # 141, Type I) Special Protection System (Maine) Maine Power Reliability Program (MPRP)

Part of RSP 1411 ($1,369.0)


1466 Remove the Bucksport 65/205 Reverse Power SPS (NPCC # 22 – Type III) Special Protection System (Maine) Maine Power Reliability Program (MPRP)

Part of RSP 1411 ($1,369.0)


SPS – Special Protection System


12


Project ID #



1467 Remove the Orrington T1 SPS (NPCC # 182 – Type III) Special Protection System (Maine) Maine Power Reliability Program (MPRP)

Part of RSP 1411 ($1,369.0)


1468 Modify the Maritimes Islanding Special Protection System to remove the inputs from the New England transmission system (Maine) Maine Power Reliability Program (MPRP)

Part of RSP 1411 ($1,369.0)



13

Cost Estimate Comparisons of Reliability Projects March 2015 vs. June 2015 Update (1)

(1) Transmission Owners provided all estimated costs, which may not meet the guidelines described in Planning Procedure 4, Attachment D

(2) May not sum exactly due to rounding (3) The cost estimates for projects in the "Major Projects" category are moved to the "Other Projects" category once they are fully completed.

1469 1459 -10

352 357 5

114 114 0

1586 1586 0

151 151 0

147 208 61

732 795 63

318 352 34

134 134 0

431 430 -1

5434 5586 152

6235 6196 -39

79 79

74 74

11669 11935 266

0 0

-7035 -7134

4634 4801

As of March 2015

Plan Update

(in millions $)

As of June 2015

Plan Update

(in millions $)

Change in

Plan Estimate

(in millions $)

MAJOR PROJECTS

Maine Power Reliability Program (MPRP)

Greater Hartford & Central Connecticut (GHCC)

Long Term Lower SEMA Upgrades

New England East - West Solution (NEEWS)

NEEWS (Greater Springfield Reliability Project) $676.0

NEEWS (Rhode Island Reliability Project) $314.6

NEEWS (Interstate Reliability Project) $535.8

NEEWS $59.6

Greater Rhode Island Transmission Reinforcements (including Advanced NEEWS)

Pittsfield/Greenfield Project

Greater Boston - North, South, Central, Western Suburbs

New Hampshire Solution - Southern, Central, Seacoast, Northern

Vermont Solution - Southeastern, Connecticut River

Southwest Connecticut (SWCT)

SUBTOTAL (2)

OTHER PROJECTS

NEW PROJECTS

PROJECTS WHOSE COST ESTIMATES WERE PREVIOUSLY REPORTED AS

TO BE DETERMINED (TBD)

Minus 'in-service'

Aggregate estimate of active projects in the Plan (2)

TOTAL (2)

Minus 'concept'

$0

$200

$400

$600

$800

$1,000

$1,200

$1,400

$1,600

$1,800

$2,000

$2,200

$2,400

$2,600

$2,800

2014 2015 2016 2017 2018 2019

Cost

in m

illio

ns

Year

Proposed

Planned

Under Construction

In-Service

73

92

5

16

9

37 9

3

66 30

8 Planned

1 UnderConstruction

`8

28


14

Note: Numbers shown represent project quantities

Investment of New England Transmission Reliability Projects by Status through 2019

Note: Future total $ are shown at the

end of the project. Totals do not

reflect or show phasing in over time

or the depreciation of prior projects.

Total costs are associated with the

year projects are placed in-service as

reported in the Project List.

$16

$7,134

$7,857

$8,684

$11,096

$11,681$11,934

$11,935 $11,935 $11,935$11,935

$7,134$7,932

$8,570

$10,673$10,897 $11,003 $11,003

$11,003 $11,003$11,003

$0

$500

$1,000

$1,500

$2,000

$2,500

$3,000

$3,500

$4,000

$4,500

$5,000

$5,500

$6,000

$6,500

$7,000

$7,500

$8,000

$8,500

$9,000

$9,500

$10,000

$10,500

$11,000

$11,500

$12,000

$12,500

$13,000

2002 Jun-15 Dec-15 2016 2017 2018 2019 2020 2021 2022 2023

Cost

in m

illio

ns

Year

In-Service

UC+PL+PR

UC+PL


15

Cumulative Investment of New England Transmission Reliability Projects through 2023

Note: Future total $ are shown at the end of the

project. Totals do not reflect or show phasing in over

time or the depreciation of prior projects. Total costs

are associated with the year projects are placed in-

service as reported in the Project List.

Note: UC – Under Construction, PL – Planned, PR – Proposed


16

Reliability Project Counts and Aggregated Cost Estimates by Project

Stage with Applied Accuracy Ranges (1)

(1) All costs provided by Transmission Owners. The costs in the table reflect all projected in-service dates

(2) Efforts need to be made to describe projects on a more consistent basis (3) All estimates may not yet be at this level of accuracy; many estimates may be -25%/+50% (4) Not included here are the costs of 5 reliability projects for which no estimates have been provided.

Estimates for these projects are noted as TBD in the Project Listing and are only Concept Projects. (5) May not add up due to rounding.

Component /

Project / Plan Minimum Maximum

Count (2) Minimum Maximum

42 -25% 25% (3) 1006 755 1258

131 -25% 25% 1601 1201 2001

38 -10% 10% 2194 1975 2413

211 (5) 4801 3930 5672

5 (4) 0

23 -10% 10% 89 109

14

Estimated

Concept

In-Service

Proposed

(Status)

Cancelled 1

99

Planned

Under Construction

Total Plan (excluding

Concept)

($millions)

Range

Project Stage Estimate Range Costs

($millions)

2015 2016 2017 2018 2019

+25% 235 387 451 185

Estimate 188 309 361 148

-25% 141 232 271 111

050

100150200250300350400450500

PROPOSED


17

Note: Future total $ are shown at the end of the

project. Totals do not reflect or show phasing in over

time or the depreciation of prior projects. Total costs

are associated with the year projects are placed in-

service as reported in the Project List.

Project Cost Estimate Tolerances by Status and Year in Millions

2015 2016 2017 2018 2019

+25% 18 663 917 271 132

Estimate 14 531 733 216 106

-25% 11 398 550 162 79

0100200300400500600700800900

1000

PLANNED


18


Note: Future total $ are shown at the end of the project.

Totals do not reflect or show phasing in over time or the

depreciation of prior projects. Total costs are associated

with the year projects are placed in-service as reported in

the Project List.

2015 2016 2017 2018 2019

+10% 780 119 1506 9

Estimate 709 108 1369 8

-10% 638 97 1232 7

0

300

600

900

1200

1500

UNDER CONSTRUCTION


19


Note: Future total $ are shown at the end of the project.

Totals do not reflect or show phasing in over time or the

depreciation of prior projects. Total costs are associated

with the year projects are placed in-service as reported in

the Project List.

Status of Major Transmission Projects

20

PPA TCA Construction

Auburn Area Transmission System Upgrades Approved

1/08, 2/10

Approved

10/13, 2/14

Project completion

2013-2015

Pittsfield/Greenfield Project Approved

12/12 Not Submitted

Project completion

2014-2016

Maine Power Reliability Program (MPRP) Approved

7/08, 2/09, 11/10

Approved

1/29/10

Project completion

2014-2017

Vermont Solution – Connecticut River Valley Approved

4/15 Not Submitted

Project completion

2017

Southwest Connecticut (SWCT) Approved

4/15 Not Submitted

Project completion

2013-2019

Status of Major Transmission Projects, cont.

21

PPA TCA Construction

Central/Western MA Reinforcements Approved

12/07, 3/11

Group 1

2/29/2012

Project completion

2009-2017

New England East-West Solution (NEEWS) Approved

9/08, 5/12

Greater

Springfield

Reliability Project

(GSRP) Approved

2/24/2014

Rhode Island Reliability Project and GSRP are

completed; Projected completion of other

components 2013-2015

Greater Boston – North, South, Central and Suburbs

Approved

4/15, 5/15 Not Submitted

Project completion

2013-2019

New Hampshire Solution – Western, Northern, Southern and Seacoast

3/13 Not Submitted Project completion

2013-2020

Greater Hartford & Central Connecticut (GHCC) 4/15 Not Submitted Project completion

2018

APPENDIX

• ISO New England Inc. Transmission, Markets and Services Tariff Section II – Attachment K, Regional System Planning Process

• Definition Of Needs Assessment • Definition of Solution Studies

– Project Listing Subcategories • Concept: shall include a transmission project that is being considered by its proponent as

a potential solution to meet a need identified by the ISO in a Needs Assessment or the RSP, but for which there is little or no analysis available to support the transmission project. (Project not well-defined, costs not well-defined, solution implementation not supportable).

• Proposed: The project will include a regulated transmission solution that has been proposed in response to a specific Needs Assessment on the RSP and has been evaluated or further defined and developed in a Solutions Study and communicated to PAC. (Project well-defined, cost estimate quality sufficient for comparison of alternatives).

• Planned: The project will include a Transmission upgrade that has been approved by the ISO, pursuant to Section I.3.9 (presumes Needs Assessment and Solutions Study have been completed). (Still subject to Schedule 12C review for Transmission Cost Allocation)

Summary: Project Listing Definitions

23

24

Project Listing

Project Listing Column

Definitions for:

• Reliability Projects

• Interconnection Projects

• Market Efficiency Upgrades

• Elective Projects

• Merchant Projects

• Projects In-Service

• Cancelled Projects

Project Listing – Column Definitions

25

Part Number (Part #)

The Part #’s designate the ‘need’ category of the project. Original categories are not changed

when a project is placed ‘In-Service’ or ‘Cancelled”. Part 1 – These projects are Reliability Upgrades.

1a: Planned or Under Construction 1b: Conceptual or Proposed

Part 2 – These projects are Generator Interconnection Upgrades. 2a: Proposed (I.3.9 approval but without Generator Interconnection Agreement), Planned (I.3.9 approval with Generator Interconnection Agreement), or Under Construction 2b: Conceptual or Proposed

Part 3 – These projects are Market Efficiency Upgrades. 3a: Planned or Under Construction 3b: Conceptual or Proposed

Part 4,5 – These projects may be promoted by any entity electing to support the cost of

transmission changes. The entity sponsoring the changes will have their own justification for their actions.

4,5a: Planned or Under Construction 4,5b: Conceptual or Proposed

26

Project ID This number is generated from ISO-NE System Planning Information Tracking System. It may change in the

future as the tracking system evolves.

Primary Equipment Owner The company listed here is the responsible equipment owner / provider designated to design and implement

the project.

Other Equipment Owner

For projects that involve multiple Transmission Owners, the company listed here is also a responsible equipment owner / provider designated to design and implement the project.

Projected Month/Year of In-Service

The month/year entered is the date the project is expected to be placed in service.

Major Project

Name given to a project that consists of smaller subprojects.

Project / Project Component

A brief, high-level description of the project is entered here. It will either include major pieces of substation equipment and/or types of line work to be performed.

Project Listing – Column Definitions, cont.

27

Status In Service: The project has been placed in operation. Under Construction: The project has received necessary approvals and a significant level of engineering or construction is underway.

Planned: The project will include a Transmission upgrade that has been approved by the ISO. Proposed: The project will include a regulated transmission solution that has been proposed in response to a specific Needs Assessment on the RSP and has been evaluated or further defined and developed in a Solutions Study and communicated to PAC.

Concept: Shall include a transmission project that is being considered by its proponent as a potential solution to meet a need identified by the ISO in a Needs Assessment or the RSP, but for which there is little

or no analysis available to support the transmission project. Cancelled: Project has been cancelled.


28

PPA Approval (Review of Market Participant’s Proposed Plans) A date in this column signifies when the project received approval pursuant to Section I.3.9 of the ISO-New

England Tariff. This approval indicates that the project will have no adverse impact on the stability, reliability,

or operating characteristics of the system. A ‘no’ indicates that an approval is required, but has not been

received yet. An ‘NR’ indicates that an I.3.9 approval is not required.

TCA Approval (Transmission Cost Allocation) A date in this column signifies when the project PTF costs were reviewed and approved. This approval

indicates that it has been agreed whether, and by how much, the scope of the project and associated costs

exceed regional needs. An ‘NR’ indicates that a TCA approval is not applicable either because the project has been cancelled or no/very minimal PTF costs are involved.

Estimated Costs

The pool-supported project cost estimate presented here should be the best estimate available. It is understood that the estimate accuracy may vary dependent on the maturity of the project. Accuracy tolerances for these estimates are targeted as follows: Concept Project Proposed Project that has been reviewed and approved to proceed by ISO-NE (+/-25%), I.3.9-Approved Project (+/-25%), and TCA-Approved Project (+/-10%)


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