1 1 1 central maine power company local system plan presentation planning advisory committee meeting...
TRANSCRIPT
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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
NeedProjected In-Service
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
NeedProjected In-Service
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
NeedProjected In-Service
Date
Major
Project
Project Status Needs Assessment Solutions
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
Project Status Needs Assessment Solutions
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
Project Status Needs Assessment Solutions
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
Need Projected In-Service
Date
Major
Project
Project Status Needs Assessment Solutions
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
Need Projected In-Service
Date
Major
Project
Project Status Needs Assessment Solutions
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
Project Status Needs Assessment Solutions
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
NeedProjected In-Service
Date
Major
Project
Project Status Needs Assessment Solutions
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
Overloads under single element contingency conditions
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
Overloads under single element contingency conditions
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
Generator Interconnect
2011 ISO-NE Queue # 197
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
Need Projected In-Service
Date
Major Project
Project Status Needs Assessment Solutions
Generator Interconnect
2012 ISO-NE Queue # 272
Withdrawn Interconnection Request for 85 MW Wind Farm to tap into CMP 115 kV Line Section 222 north of Wyman Hydro Substation
Not Applicable
Generator Interconnect
2012 ISO-NE Queue # 215
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
Generator Interconnect
2012 ISO-NE Queue # 244
Concept Interconnection Request for 117 MW Wind Farm to tie into CMP Wyman Hydro Substation
Undergoing System Impact Study
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LSP Generation Projects
Need Projected In-Service
Date
Major Project
Project Status Needs Assessment Solutions
Generator Interconnect
2011 ISO-NE Queue # 287
Concept Interconnection Request for 33 MW Wind Farm to tie into CMP 115 kV Line Section 229 between Rumford Substation and Riley Substation
Undergoing System Impact Study
Generator Interconnect
2012 ISO-NE Queue # 290
Planned Interconnection Request for 20 MW Wind Farm to tie into CMP Woodstock Substation
System Impact Study Complete
Generator Interconnect
2012 ISO-NE Queue # 300
Concept Interconnection Request for 20 MW Wind Farm to tie into CMP 115 kV Line Section 229 between Rumford Substation and Riley Substation
Undergoing System Impact Study
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LSP Generation Projects
Need Projected In-Service
Date
Major Project
Project Status Needs Assessment Solutions
Generator Interconnect
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.
Undergoing System Impact Study
Generator Interconnect
2012 ISO-NE Queue #333
Concept Interconnection Request for 216 MW Wind Farm to tie into CMP. Three potential interconnection sites to be studied.
Undergoing Feasibility Study
Generator Interconnect
2012 ISO-NE Queue #335
Concept Interconnection Request for 25 MW biomass generator at existing customer site.
Undergoing System Impact Study
Generator Interconnect
2011 ISO-NE Queue #337
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.
Undergoing System Impact Study
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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
NeedProjected In-Service
Date
Major Project
Project Status Needs Assessment Solutions
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
Project Status Needs Assessment Solutions
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