Transcript Orrington South Interface - Central Maine Power Company

AUGUST 19, 2014
Maine 2014 Outage Coordination
PUBLIC VERSION
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Agenda
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Welcome, Introductions and Safety
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Expectations and Goals for Meeting
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MPRP Project Update
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Other CMP/EMERA Maine Projects
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Specific Outage Discussion, Key Fall 2014/Spring 2015 outages
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Questions
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Expectations/Goals
• Communicate significant planned 2014/2015 Maine
transmission equipment outages that could impact generation
constraints
• Communicate specific outage coordination changes to limit
impact on potential generation constraints
• Respond to outage coordination questions from the audience
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MPRP Project Statistics
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452 miles of new or rebuilt 345kV and
115kV Transmission
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5 new Greenfield Substations
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183 miles of new 345kV Transmission
105 miles of new 115kV Transmission
5 miles of Rebuilt 345kV Transmission
140 miles of rebuilt 115kV Transmission
8 miles of rebuilt 34.5kV Sub Transmission
11 miles of 345kV and 115kV line terminations
Albion, Coopers, Monmouth, Larrabee, Raven
6 Major Substation expansions
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Maguire, South Gorham, Surowiec, Gulf Island, Belfast,
Livermore Falls
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50 Remote end substation expansions or
modifications
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60 - Transmission line crossings
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Northern Loop Construction
• Construction Status
– Belfast 115kV tap completed
• Near term construction activities
– Coopers Mills Road Substation energization
– Construction of one new 345kV line and one new 115kV line
• Future construction activities
– None
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Central Loop Construction
• Construction Status
– Livermore Falls Substation energized
– New 115kV line from Rumford to Larrabee Road energized
• Near term construction activities
– Construction of one new 345kV line and rebuild of two 345kV lines
• Future construction activities
– Completion of 115kV rebuilds
– Completion of one new 345kV line and rebuild of two 345kV lines
– Completion of Coopers Mills Road tie-ins and energization
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Southern Loop
• Construction Status
– Maguire Road 345kV energization
– Construction of new Maguire Road – Eliot 345kV line complete
• Near term construction activities
– Eliot Substation final energization
– Maguire Road Substation final energization
• Future construction activities
– None
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CMP/EMERA Maine Capital and Maintenance
Work
• Other Non-MPRP CMP Capital and Maintenance Work that
affects the transmission system
– Transmission Line Structure Replacements both Capital and
Maintenance
– System Planning related Substation rebuilds or expansions to support
future reliability needs
– Substation equipment replacements or upgrades to address
maintenance concerns
– Transmission Line re-rates or rebuilds to increase capacity
– Substation maintenance equipment inspections and relay testing
– Regulatory required relay and equipment trip checks
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Maine 2014/2015 Transmission Outages
• Changes to plan typically result in increased construction cost
– Costs include overtime, additional contractor resources, expedited
material, additional engineering and outage coordination resources,
environmental mitigation, schedule and remobilization costs,
permitting, etc.
• Outages that have the potential for significant impact to
generators in 2014/2015 will be discussed
– Long (greater than one week) duration outages
– Significant potential generation constraints
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CMP Outage Applications
• Central Maine Power had 1,400 outage applications in 2013
• There have been 517 transmission (>34.5kV) and 185 subtransmission (34.5kV) outage applications in 2014
• The MPRP Project has submitted 975 outage applications for
the project through March 19, 2014
• The outages range in duration from a few hours to eleven
months in length
• The MPRP team anticipates that there will be an additional
300 – 400 outages needed to finish the program
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TRANSMISSION SYSTEM LIMITATIONS
All facility in and single facility out conditions
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Transmission System Limits Impact On
Generation Constraints
• Two categories of transmission system interface limits
• Wide Area – 13 Interfaces
– Typically Include 345 kV and 115 kV facilities
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New Brunswick to New England Interface
New England to New Brunswick Interface
New England to New Brunswick + Keene Road Export Interface
Orrington South Interface
Orrington North Interface
Orrington Import Interface
Maine Yankee South Interface
Surowiec South Interface
Maine to New Hampshire Interface
New Hampshire to Maine Interface
Seabrook South Interface
Northern New England Scobie & 394 Interface
North to South Interface
– All lines in limits typically range from ~1000 MW to ~4000 MW
– Single Line Out Limits typically reduce limits by ~500 MW to ~800 MW
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Transmission System Limits Impact On
Generation Constraints
• Local Area - 7 Interfaces
– Typically include 115 kV facilities
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Keene Road Export Interface
Bangor Hydro Export Interface
Keene Road + Bangor Hydro Export Interface
Wyman Hydro Export Interface
Inner Rumford Export Interface
Outer Rumford Export Interface
Western Maine Export Interface
– All lines in limits typically range from ~150 MW to ~500 MW
– Single Line Out Limits typically reduce limits by ~50 MW to 100 MW
– Most significant recent generations constraints have been from local
area constraints
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2014 Maine Major Outages - Update
• 115 kV Outage Condition B Western Maine
– 3rd Qtr 2013 – 4th Qtr 2013 ~ 3 month duration (Completed)
– 2nd Qtr 2014 ~ 2 week duration (Completed)
• 345 kV Outage Condition L Northern Maine Area
– 1st and 2nd Qtr 2014 ~ 7 weeks (Completed)
• 115 kV Outage Condition M Western Maine
– 2nd Qtr 2014 ~ 1 week (Completed)
• 345 kV and 115 kV Outage Condition N Central Maine
– 2nd Qtr 2014 ~ 1 week (Completed)
• 345 kV Outage Condition O Northern Maine
– 1st outage 3rd Qtr 2014 ~ 1 week (Completed live line)
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2013-14 Maine Major Outages – Update (cont.)
• 345 kV Outage Condition O Northern Maine
– 2nd outage 3rd Qtr 2014 ~ 2 weeks
– 3rd outage 1st Qtr 2015 ~ 1 week
• 345 kV Outage Condition P Southern Maine
– 3rd Qtr 2014 ~ 1 week
– 4th Qtr 2014 ~2 weeks
• 345 kV Outage Condition Q Southern Maine
– 4th Qtr 2014 ~ 4 weeks
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2013-14 Maine Major Outages – Update (cont.)
• 345 kV Outage Condition R Southern Maine
– 1st Outage 3rd Qtr 2014 ~ 4 weeks
– 2nd Outage 4th Qtr 2014 ~ 5 weeks
• 115 kV Outage Condition S Central Maine
– 4th Qtr 2014 through 1st Qtr 2015 ~ 2 months
• 345 kV Outage Condition T Central Maine
– 1st Qtr 2015 ~ 2 weeks
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345 kV Outage Condition O Northern Maine
• Most difficult outage to coordinate in New England
– Historically Requires:
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Many contingencies result in controlled islanding of the Maritimes
Must run specific generators
Do not exceed limits on specific generators
Minimum New Brunswick-New England Interface transfers
Maximum Orrington South Interface transfers
Results in almost all generators inside the Bangor Hydro + Keene Road
Export Interface cannot operate
• Interface Limits
– New Brunswick-New England Interface MINIMUM 200 MW – 300 MW
– Orrington South Interface limit 200 MW – 300 MW
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345 kV Outage Condition O Northern Maine
(cont.)
• Potential options to be assessed, partial MPRP completions:
– Assess if some of the outage can be accomplished live-line
– Will assess a completely different approach to the outage to
determine if it is more reliable, increases transfer capabilities, reduces
impacts on generators ability to operate
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Eliminates 1st contingency controlled islanding of the Maritimes
Reduces must run of specific generators
Reduces do not exceed limits on specific generators
Generators inside the Bangor Hydro + Keene Road Export Interface able to
compete for limited transfer capability
• 1st outage
– Originally scheduled for 3rd Qtr 2014 ~ 1 week
– Already completed entire outage live line
– No impact to generation or interface transfer limit reductions
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345 kV Outage Condition O Northern Maine
(cont.)
• 2nd outage
– Originally scheduled for 4th Qtr 2014 ~ 2 weeks, moved to 3rd Qtr 2014
~2 weeks
– Potential still exists to perform the outage with a completely different
approach
• Interface Limits
– New Brunswick-New England Interface Limits slave to Orrington South
Interface Limits
– Orrington South Limits ~400 MW
– Moved to overlap other outages to minimize overall duration of
restrictions
• 1st Outage P – Surowiec South Limit of 50 MW – 400 MW
• 1st Outage R
– Maine-New Hampshire Limit of 1000 MW – 1700 MW
– Northern New England Scobie + 394 Interface Limits 1300 MW – 2950 MW
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345 kV Outage Condition O Northern Maine
(cont.)
• 3rd outage 1st Qtr 2015 ~ 1 week
– This outage has been repositioned to occur after additional key MPRP
facilities are completed that will increase limits
– Potential still exists to perform the outage with a completely different
approach
– Interface Limits
• New Brunswick-New England Interface Limits slave to Orrington South
Interface Limits
• Orrington South Limits ~500 MW
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345 kV Outage Condition P Southern Maine
• 1st Outage 3rd Qtr 2014 ~ 1 week
– Interface Limits
• Surowiec South Interface Limits 50 MW – 400 MW
– Moved to overlap other outages
• Overlap reduces duration of significant interface limits
• There is less exposure to southern interface congestion
– 2nd Outage O – Orrington South Limit of ~400 MW
– 1st Outage R
» Maine-New Hampshire Limit of 1000 MW – 1700 MW
» Northern New England Scobie + 394 Interface Limits 1300 MW – 2950
MW
• 2nd Outage 4th Qtr 2014 ~ 2 weeks
– Interface Limits
• Surowiec South Interface Limits 50 MW – 400 MW
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345 kV Outage Condition Q Southern Maine
• 4th Qtr 2014 ~ 4 weeks
– Interface Limits
• Surowiec South Interface Limits 50 MW – 400 MW
– Outage timing has environmental considerations
– Moved to overlap other outages
• Overlap reduces duration of significant interface limits
• There is less exposure to southern interface congestion
– 2nd Outage R
» Maine-New Hampshire Limit of 1000 MW – 1700 MW
» Northern New England Scobie + 394 Interface Limits 1300 MW – 2950
MW
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345 kV Outage Condition R Southern Maine
• 1st Outage 3rd Qtr 2014 ~ 4 weeks, 2nd Outage 4th Qtr 2014 ~ 5
weeks
• Original plan for both outages
– Interface Limits
» Maine-New Hampshire Interface Limits 200 MW – 300 MW
• Outages moved significantly until key MPRP facilities are completed
• Interface Limits
– Maine-New Hampshire Interface Limits 1000 MW – 1700 MW
– Northern New England Scobie + 394 Interface Limits 1300 MW – 2950 MW
• Moved to overlap other outages
– Overlap reduces duration of significant interface limits
– There is less exposure to southern interface congestion
– 1st Outage 3rd Qtr 2014
» 2nd Outage O – Orrington South Limit of 400 MW
» 1st Outage P – Surowiec South Interface Limits 50 MW – 400 MW
– 2nd Outage 4th Qtr 2014
» Outage Q - Surowiec South Interface Limits 50 MW – 400 MW
• Outage duration extended to complete additional maintenance work not
related to MPRP
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115 kV Outage Condition S Central Maine
• 4th Qtr 2014 through 1st Qtr 2015 ~ 2 months
– Original plan
• Interface Limits
– Wyman Hydro Export Interface Limits ~50 MW – ~75 MW
• Substantial impact to generators for a long duration
– Current plan
• Construction sequencing modified to mitigate this exposure
• Interface Limits
– Wyman Hydro Export Interface Limits ~150 MW – ~275 MW
– Expecting ~150 MW limit for ~ 2 weeks in 4th Qtr 2014
– Expecting close to ~275 MW limit for ~ 6 weeks
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345 kV Outage Condition T Central Maine
• 1st Qtr 2015 ~ 2 weeks
– Original plan
• Interface Limits
– Orrington South Interface limit ~ 500 MW
– This outage has been repositioned to occur
• After additional key MPRP facilities are completed that will increase limits
• Overlap 3rd Outage O for 1st week
– Overlap reduces duration of significant interface limits
– 3rd Outage O limits are more restrictive on the Orrington South Interface ~
500 MW
• Outage T for 2nd week
– Interface Limits
» Orrington South Interface limit ~600 MW
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REFERENCES
MPRP Geographic Overview
Significant Maine Interfaces
MPRP Geographic Overview
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Wyman Hydro Export Interface
• Wyman Hydro Export
– All lines in-service limits do
not currently exist
– Single facility out limits exist
• Based upon two 115 kV
lines remaining after
limiting contingency
– Limits due to stability
performance (damping)
• 200 MW – 290 MW
– Behind the constraint . . .
• ~ 360 MW of generation
• ~ 215 MW more proposed
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Inner Rumford Export Interface
• Inner Rumford Export
– All lines in-service limits do
not currently exist
– Single facility out limits exist
• Limit based upon one 115
kV line remaining after
limiting contingency
– Limits due to stability
performance (damping, unit
stability and post-fault
voltage recovery)
• 75 MW – 215 MW
– Behind the constraint . . .
• ~460 MW of generation
• ~ 255 MW more proposed
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Outer Rumford Export Interface
• Outer Rumford Export
– All lines in-service limits do
not exist
– Single facility out limits exist
• Limit based upon one 115
kV line remaining after
limiting contingency
– Limits due to stability
performance (damping, unit
stability and post-fault
voltage recovery)
• 75 MW – 215 MW
– Behind the constraint . . .
• ~645 MW of generation
• ~ 255 MW more proposed
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Western Maine Export Interface
• Western Maine Export
– All lines in-service limits do
not exist
– Single facility out limits
exist
• Limit based upon one 115
kV line remaining after
limiting contingency
– Limits due to stability
performance (damping)
• 300 MW – 500 MW
– Behind the constraint . . .
• ~1050 MW of generation
• ~ 470 MW more proposed
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Keene Road Export Interface
• Keene Road Export
– All lines in-service limit
• 155 MW
• Based upon one 115 kV
line remaining after
limiting contingency
– Limits due to stability (postfault voltage recovery)
– Facility out limits
• 0 MW – 120 MW
– Behind the constraint . . .
• ~320 MW of generation
• ~ 90 MW more proposed
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33
Bangor Hydro Export Interface
• Bangor Hydro Export
– All lines in-service limits do
not exist
– Single facility out limits exist
• Limit based upon two 115 kV
lines and one or two 345/115
kV TX remaining after limiting
contingency
– Limits due to stability
performance (damping,
instability)
• 200 MW – 440 MW
– Behind the constraint . . .
• ~940 MW of generation
• ~270 MW more proposed
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Bangor Hydro + Keene Road Export Interface
• Bangor Hydro + Keene Road
Export
– All lines in-service limits do
not exist
– Single facility out limits exist
• Limit based upon two 115 kV
lines and one or two
345/115 kV TX remaining
after limiting contingency
– Limits due to stability
performance (damping,
instability)
• 200 MW – 580 MW
– Behind the constraint . . .
• ~1250 MW of generation
• ~ 360 MW more proposed
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Orrington Import Interface
• Orrington Import
– All lines in-service limits do
not exist
– Single facility out limits exist
• Limit based upon one 115 kV
line remaining after limiting
contingency
– Limits due to stability
performance (post fault
voltage recovery, inter Area
instability)
• 250 MW – 1250 MW
– Behind the constraint . . .
• ~ 320 MW of generation
• ~ 1000 MW New Brunswick
• ~ 240 MW More proposed
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Orrington South Interface
• Orrington South
– All lines in-service limit is
1050 MW - 1200 MW
– Single facility out limits exist
• Numerous combinations
– Limits due to thermal,
voltage and stability
performance
• 200 MW – 1200 MW
– Behind the constraint . . .
• ~ 1120 MW of generation
• ~ 1000 MW New Brunswick
• ~ 510 MW More proposed
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Surowiec South Interface
• Surowiec South
– All lines in-service limit is
1150 MW
– Single facility out limits exist
• Numerous combinations
– Limits due to stability
performance (damping, unit
stability and post-fault
voltage recovery)
• 300 MW – 1150 MW
– Behind the constraint . . .
• ~ 2480 MW of generation
• ~ 1000 MW New Brunswick
• ~ 1160 MW More proposed
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