1 1 1 central maine power company local system plan presentation planning advisory committee meeting...

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Central Maine Power Company

Local System PlanPresentation

Planning Advisory Committee Meeting

October 21, 2010

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Purpose of Local System Plan

Per Attachment K – Local, this LSP presentation:• Describes projected improvements to non-PTF

that are needed to maintain reliable customer service.

• Reflects:– LSP Needs Assessments– Corresponding transmission system planning studies

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LSP Communication

• LSP is communicated to the PAC at an ISO-NE PAC RSP meeting once a year.– Separate meetings can be arranged if needed

• PAC, Transmission Customers, and other Stakeholders have 30 days to provide written comments for consideration to CMP

– CMP’s contact:Curtis BeveridgeManager System PlanningCentral Maine Power Company83 Edison DriveAugusta, Maine 04336 (email: [email protected])

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LSP Communication cont.

• Each PTO is individually responsible for publicly posting and updating the status of its respective LSP and the transmission projects list on a website in a format similar to the RSP project list

• The ISO-NE RSP project list contains links to each individual PTO’s transmission project list

• CMP’s LSP project list is located at:

http://www.cmpco.com/SuppliersAndPartners/TransmissionServices/CMPTransmissionSvc/lsp.html

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CMP LSP Project List

• Central Maine Power will update the LSP project list at least annually.

• A presentation of the LSP will be made annually.

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

• Similar to PTF projects in the RSP, the LSP project list contains a status of each non-PTF project:

Concept- Project is under consideration as a possible solution to a need, but little or no analysis is available

Proposed- CMP has determined that the project is an appropriate solution to a need, but has not yet obtained internal budget approval

Planned- Budgetary approval has been obtained

Under Construction-

Project is approved and is under design/construction

In-Service- Project is complete

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CMP’s Local System Planning Process

• All CMP system upgrades are determined in accordance with Central Maine Power Company Transmission Planning Criteria.

• Planning studies can result from:– Periodic Assessment of CMP’s 14 Local Planning Areas– Load Growth– Retail or Wholesale Customer Request – Generator Interconnection Request– System-Wide Contingency Analysis

• Studies may utilize both ISO-NE Library Base Cases and/or Local CMP Base Cases.

• Generator Interconnections on the non-PTF Transmission System are guided by the CMP Transmission & Distribution Interconnection Requirements for Generation.

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LSP Projects

NeedProjected In-Service

Date

Major

Project Project StatusNeeds Assessment Solutions

Load Growth/

Sub-Area Study

2011

Portland North

Area Reliability

Study

Line work Proposed

Could overload under normal operating and/or single element contingency conditions in 2010

Re-rate portions of two 34kV lines: Sections 180A & 102

Load Growth/

Sub-Area Study

2012Bishop Street

SubstationProposed

Low voltages on Section 188 under single element contingencies, violation of 25 MW loss of load criteria

Add 2-34 kV breakers, add 5.4 MVAR capacitor bank

Load Growth/

Sub-Area Study

2012Voltage support

Proposed

Low voltages in the local area under single element contingencies

Add 5.4 MVAR capacitor banks at Freeport, E. Deering, N. Gorham S/S (2)

Load Growth/

Sub-Area Study

2012 Line Work Proposed

Two segments overload under normal operating and/or single element contingency conditions in 2012

Rebuild portions of 34.5 kV line Section 188

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LSP Projects


Date

Major

Project

Project Status Needs Assessment Solutions

Load Growth/

Sub-Area Study2013

Portland North

Area Reliability

Study

(Cont)

Elm Street

SubstationProposed

Transmission elements experienced overloading

(Not needed if Raven Farms is built for MPRP)

Bring S164 in/out of Elm St, re-rate S164A

Load Growth/

Sub-Area Study2014

Swett Rd.

Substation

Proposed Low Voltages in the local area under single element contingencies

Add 2-34 kV breakers, rebuild Section 103

Load Growth/

Sub-Area Study2015

North Yarmouth Substation

Proposed

Reliability Concerns under single element contingencies

New 115/34kV S/S tapped from Sect 166, and 14.8 mi 34.5 kV line to Gray & Freeport with breakers

Load Growth/

Sub-Area Study2017

Swett Road Substation

ConceptVoltage support is needed

Add 5.4 MVAR capacitor bank

Load Growth/

Sub-Area Study2018

Prides Corner

SubstationConcept

Additional voltage support is needed

Add an additional 5.4 MVAR capacitor bank

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LSP Projects


Date

Major

Project Project StatusNeeds Assessment Solutions

Load Growth/

Sub-Area Study 2011

Skowhegan

Area

Reliability

Line Work Proposed

Overloading under single element contingency conditions

Re-rate Section 73

Load Growth/

Sub-Area Study2011

Study

Norridgewock Source

Proposed

Distribution circuit becoming overloaded, need to bring in a new source to shift load to.

Tap Section 73, install 34/34 delta-wye isolating transformer for new distribution supply

Load Growth/

Sub-Area Study2013

Lakewood Substation Expansion

Proposed

Reliability concerns under single element contingencies

Loop Section 241 into a new 115 kV ring bus with 2nd 115/34.5 kV transformer

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LSP Projects


Date

Major

Project


Load Growth 2011 Bath Area Line Work Proposed

Overloads under single element contingency conditions

Rebuild 34.5 kV Sections 55 & 58

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LSP Projects

Need Projected In-

Service Date

Major

Project


Load Growth/

Sub-Area Study

2011Augusta

Area Reliability

Study

Line

Re-ratingsProposed

Overloaded under normal operating conditions

Re-rate 34 kV line Sections 39 & 41 to 212°F thermal limit

Load Growth/

Sub-Area Study

2011Bowman St Substation

Under Construction

Bowman St 115/34.5 kV transformer overloaded and low 34.5 kV bus voltage, post-contingency

Add 2nd 115/34.5 kV transformer

Load Growth/

Sub-Area Study

2015Coopers Mills Substation

Proposed

Low voltages following loss of Maxcys 115/34.5 kV transformer

Add second 115/34.5 kV transformer at Coopers Mills (Maxcy's)

Coordinate w/MPRP

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LSP Projects

Need Projected In-Service

Date

Major

Project


Load Growth/

Sub-Area Study

2011Berwick - Lebanon

Area Reliability

Study

Bassett Substation

PlannedExperiencing high load growth, thermal restriction on Section 118

New Bassett Substation

Load Growth/

Sub-Area Study

2011 ProposedExperiencing high load growth, thermal restriction on Section 118

Add 2nd 34.5 kV transmission line from Quaker Hill to Bassett

Load Growth/

Sub-Area Study

2013 Berwick Substation

ProposedLoad growth, inadequate 34/12 kV capacity, overloaded distribution circuits

Add new Berwick Substation and 34.5 kV transmission line from Bassett

Load Growth/

Sub-Area Study

2014New Lebanon Substation

ProposedLoad growth in Lebanon area will exceed area capacity

Add new Lebanon Substation and 34.5 kV transmission line from Butler’s Corner

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LSP Projects


Date

Major

Project


Load Growth/

Sub-Area Study2011

Camden-Rockland

Area Reliability

Study

Camden Substation Proposed

Low voltage Add 5.4 MVAR 34.5 kV capacitor bank

Load Growth/

Sub-Area Study2011

Park St Substation

Proposed Low voltage Add 5.4 MVAR 34.5 kV capacitor bank

Load Growth/

Sub-Area Study2011

Meadow Rd Substation

Proposed Low voltage Add 10.8 MVAR 34.5 kV capacitor bank

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LSP Projects


Date

Major

Project


Load Growth/

Sub-Area Study

2011

Lewiston Auburn Area

Leeds Substation

ProposedLow voltage and transformer loading at Turner

Build a new Leeds 115/34.5 kV distribution substation

Load Growth/

Sub-Area Study

2020 Reliability Study

Gulf Island transformer Upgrade

ConceptTransformer overload with load growth, with MPRP reinforcements

Transformer change-out

Load Growth/

Sub-Area Study

2013 Section 148 Cable Replacement

Planned34.5 kV line overload post-contingency

Replace cable into Great Falls Substation

Load Growth/

Sub-Area Study

2011Section 72

re-rate

Planned34.5 kV line overload post-contingency

Change protection settings

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LSP ProjectsNeed Projected

In-Service Date

Major

Project


Load Growth/

Sub-Area Study

2012 Saco Bay

Area

Reliability

Study

New Vallee Lane & Goosefare Substations

Proposed Additional 115 kV transformer capacity and voltage support is needed in the Saco Bay Area. Loss of Section 193 violates CMP’s loss of load criterion.

New 115 kV double-circuit line from Louden to Old Orchard Beach

New 115/34.5 kV Substation in Old Orchard Beach & new 115/12 kV substation in Saco.

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LSP Projects


Date

Major

Project


Load Growth/

Sub-Area Study2012

Mid-Coast Reliability Study

Belfast Voltage Support

Proposed

Loss of Section 86 exceeds CMP’s loss of load criterion and results in low voltages

Add 10.8 MVAR 34.5 kV capacitor bank

Part of MPRP (with 115 kV breakers)

Load Growth/

Sub-Area Study 2012

Waterville/Winslow Area Reliability Study

Line work Concept


Re-rate portions of the 34.5 kV lines Sections 13 and 38.

Load Growth/

Sub-Area Study 2012Belgrade Source

Concept

Reliability and voltage concerns on a very long 34.5 kV distribution circuit out of Rice Rips; need to bring in a new source to shift load.

Install a 115/34 kV transformer at North Augusta with new 34.5 kV circuit into the Belgrade area.

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LSP ProjectsNeed Projected

In-Service Date

Major

Project Project Status Needs AssessmentSolutions

Load Growth/

Sub-Area Study 2012

Brunswick Topsham

Area Study

Line Work Concept


Re-rate 34.5 KV Section 76

Load Growth/

Sub-Area Study 2012Upgrade 34/12 kV Transformer

ConceptOverloads under normal operating conditions

Upgrade Brunswick Hydro T1 34/12 kV transformer

Load Growth/

Sub-Area Study 2014Upgrade 34/12 kV Transformers

ConceptOverloaded under normal operating conditions

Upgrade Woolwich T1 34/12 kV transformer

Upgrade Topsham T2 34/12 kV transformer

Load Growth/

Sub-Area Study2014

Topsham 115 Substation

ConceptChange-out transformers to larger capacity to supply local load growth

Upgrade Topsham T1 and T3 115/34.5 kV transformers

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LSP Generation ProjectsNeed Projected

In-Service Date

Major Project

Project Status Needs Assessment

Solutions

Generator Interconnect

2009 ISO-NE Queue # 138

In Service

(Part A)

Part B-will be in service by 10/31/10

Met Developer’s Interconnection Request & Implemented the Recommendations contained in the I.3.9 Proposed Plan Application

•Rebuild Bigelow Substation•Wyman Hydro Substation Upgrades•Re-rate Sect 215•Several area capacitor banks



Planned Request to connect 50.6 MW Wind Farm to new CMP 115 kV Section 270

•New 115 kV line Section 270 (old Section 59)•New Roxbury Substation•Move 115/34 kV transformer from Rumford to Roxbury

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LSP Generation Projects


Date

Major Project




Withdrawn Interconnection Request for 85 MW Wind Farm to tap into CMP 115 kV Line Section 222 north of Wyman Hydro Substation

Not Applicable



Planned Interconnection Request for 50 MW Wind Farm to tap into CMP 115 kV Section 270 north of Rumford 115 kV Substation

System Impact Study Complete



Concept Interconnection Request for 117 MW Wind Farm to tie into CMP Wyman Hydro Substation

Undergoing System Impact Study

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Date

Major Project




Concept Interconnection Request for 33 MW Wind Farm to tie into CMP 115 kV Line Section 229 between Rumford Substation and Riley Substation




Planned Interconnection Request for 20 MW Wind Farm to tie into CMP Woodstock Substation

System Impact Study Complete



Concept Interconnection Request for 20 MW Wind Farm to tie into CMP 115 kV Line Section 229 between Rumford Substation and Riley Substation


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Date

Major Project



2012 ISO-NE Queue #310

Tied to

Queue #138

Concept Interconnection Request for 45 MW Wind Farm to tie into Customer owned 115 kV line Section 267 north of Bigelow Substation.




Concept Interconnection Request for 216 MW Wind Farm to tie into CMP. Three potential interconnection sites to be studied.

Undergoing Feasibility Study



Concept Interconnection Request for 25 MW biomass generator at existing customer site.




Concept Interconnection Request to true-up the existing generating plant net output and add a net increase of 26 MW at existing customer site, Section 227.


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LSP Future Studies

Major Project Projected Study Date

Status Needs Assessment Solutions

Portland North Area Reliability Study

Dec 2010In Progress

Re-affirm timing and need of projects from the original study.

Re-assessing transmission and NTA requirements

Mid-coast Area Reliability Study Dec 2010

In Progress

Re-affirm timing and need of projects from the original study.

Re-assessing transmission and NTA requirements

Southern Maine Area Reliability Study

2011 Concept

Contingency processor showed thermal and voltage violations under single element contingencies

Conduct area reliability study and assess possible system upgrades

Lakes Region Area Reliability Study 2011 Concept

Contingency processor showed thermal and voltage violations under single element contingencies

Conduct area reliability study and assess possible system upgrades

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Potential NTA Projects


Date

Major Project


Load Growth/

Sub-Area Study

2012 Portland North Area Reliability Study

Falmouth Substation

Proposed Low voltages on Section 180 under single element contingencies, violation of 25 MW loss of load criteria

Add 2-34.5 kV breakers

Load Growth/

Sub-Area Study

2015 East Deering Substation

Proposed Additional source needed in the area

(Coordinate with MPRP)

115-34kV substation with 115kV line from Elm St.

Load Growth/

Sub-Area Study

2012 Camden-Rockland Area Study

Highland

Substation

Proposed Increased reliability to meet planning loss of load criteria by splitting Section 51 (Warren – Waldoboro).

Add 1 mile 34.5 kV line to separate Warren – Waldoboro line

Load Growth/

Sub-Area Study

2013 Highland

Substation

Proposed Need for post-contingent support in the area provided by a new 34 kV line.

New 34.5 kV transmission line to Meadow Rd

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In-Service LSP Projects

NeedIn-Service

Date

Major Project


Load Growth/

Sub-Area Study

June 2010

Berwick – Lebanon Area Reliability

Study

High St

SubstationIn service

Thermal restrictions on transmission elements

Re-rate 34.5 kV Sections114, 112A, 114A & 185

Load Growth/

Sub-Area Study

Nov 2010

Lewiston Auburn Area Study

Hotel Road Substation

Under-Construction

Post-contingency 34.5 kV low voltage problems & overloading of Hotel Rd 115/34 kV transformer

Install 2nd 115/34 kV transformer at Hotel Road

Load Growth/

Sub-Area Study

Jul 2010

Saco Bay Area Reliability

Study

Louden

Substation In service

34.5 kV line overload Rebuild 34.5kV Section 174

1 1 1 central maine power company local system plan presentation planning advisory committee meeting...

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