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MARCH 31, 2014

MARCH 31, 2014. Maine 2014 Outage Coordination. CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE. Agenda. Welcome, Introductions and Safety Expectations and Goals for Meeting MPRP Project Update Other CMP/BHE Projects

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MARCH 31, 2014

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  1. MARCH 31, 2014 Maine 2014 Outage Coordination CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  2. Agenda • Welcome, Introductions and Safety • Expectations and Goals for Meeting • MPRP Project Update • Other CMP/BHE Projects • Specific Outage Discussion, Key Spring 2014/Fall 2014 outages • Questions CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  3. Expectations/Goals • Communicate significant planned 2014 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 CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  4. MPRP Project Statistics • 452 miles of new or rebuilt 345kV and 115kV Transmission • 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 • 5 new Greenfield Substations • Albion, Coopers, Monmouth, Larrabee, Raven • 6 Major Substation expansions • Maguire, South Gorham, Surowiec, Gulf Island, Belfast, Livermore Falls • 50 Remote end substation expansions or modifications • 60 - Transmission line crossings CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  5. Northern Loop Construction • Construction Status • Albion Road Substation energized • All 115kV lines terminated into Albion Road Substation • Construction of new 345kV line from Orrington to Albion Road complete • Various 115kV rebuilds complete • Near term construction activities • Coopers Mills Road Substation energization • Rebuild various 115kV lines • Construction of one new 115kV line • Future construction activities • Termination of 115kV and 345kV lines into Coopers Mills Road • Completion of one 345kV line • Completion of one 115kV line • Rebuild various 345kV lines CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  6. Central Loop Construction • Construction Status • Larrabee Road Substation energized • Construction of new 345kV line from Larrabee Road to Surowiec • Gulf Island Substation energized • Various 115kV rebuilds • Near term construction activities • Livermore Falls Substation energization • Construction of two new 115kV lines and rebuild one 115kV line. • 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. CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  7. Southern Loop • Construction Status • Raven Farm Substation energized • Construction of new 345kV line between Raven Farm and Surowiec complete • Surowiec 345kV expansion energized • Various 115kV rebuilds • Near term construction activities • Eliot Substation final energization • Maguire Road Substation energization • Construction of new 345kV line between Maguire Road and Eliot • Various 115kV rebuilds • Future construction activities • None CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  8. 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 CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  9. Maine 2014 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 will be discussed • Long (greater than one week) duration outages • Significant potential generation constraints CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  10. CMP Outage Applications Central Maine Power had 1,400 outage applications in 2013 There have been 517 transmission (>34.5kV) and 185 sub-transmission (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 CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  11. Transmission system limitations All facility in and single facility out conditions CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  12. 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 • 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 CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  13. Transmission System Limits Impact On Generation Constraints • Local Area - 7 Interfaces • Typically include 115 kV facilities • 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 CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  14. 2013-14 Maine Major Outages - Update • 115 kV Outage Condition B Western Maine • 3rd Qtr 2013 – 4th Qtr 2013 ~ 3 month duration (Completed) • Moved from 1st Qtr 2014 to 2nd Qtr 2014 ~ 2 week duration • 115 kV Outage Condition C Western Maine • 3rd Qtr 2013 ~ 3 week duration (Completed) • 345/115 kV Outage Condition F Northern Maine Area • 4th Qtr 2013 ~ 1 week  (Completed) • 345 kV Outage Condition G Northern Maine Area • 3rd Qtr 2013 ~ 1 week (Completed) • 345 kV Outage Condition H Northern Maine Area • 4th Qtr 2013 ~ 2 weeks (Completed) CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  15. 2013-14 Maine Major Outages – Update (cont.) • 345 kV Outage Condition I Northern Maine Area • 3rd and 4th Qtr 2013 ~ 4.5 weeks (Completed) • 345/115 kV Outages Condition J Southern Maine Area • 3rd Qtr 2013 – 4th Qtr 2013 ~ 2.5 months  (Completed) • 115 kV Outages Condition K Central Maine Area • Multiple outages • 4th Qtr 2013 ~ 3 weeks (Completed) • 1st Qtr 2014 ~2.5 months (Completed) • 2nd Qtr 2014 ~ 3 weeks (Completed) • 345 kV Outage Condition L Northern Maine Area • 1st and 2nd Qtr 2014 ~ 7 weeks CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  16. 2013-14 Maine Major Outages – Update (cont.) • 115 kV Outage Condition M Western Maine • 2nd Qtr 2014 ~ 1 week • 345 kV and 115 kV Outage Condition N Central Maine • 2nd Qtr 2014 ~ 1 week • 345 kV Outage Condition O Northern Maine • 1st outage 3rd Qtr 2014 ~ 1 week • 2nd outage 4th Qtr 2014 ~ 2 weeks • 3rd outage 1st Qtr 2015 ~ 1 week • 345 kV Outage Condition P Southern Maine • 3rd Qtr 2014 ~ 1 week • 345 kV Outage Condition Q Southern Maine • 4th Qtr 2014 ~ 4 weeks

  17. 2013-14 Maine Major Outages – Update (cont.) • 345 kV Outage Condition R Southern Maine • 1st Outage 3rd Qtr 2014 ~ 2 weeks • 2nd Outage 4th Qtr 2014 ~ 2 weeks • 115 kV Outage Condition S Central Maine • 4th Qtr 2014 ~ 2 months • 345 kV Outage Condition T Central Maine • 1st Qtr 2015 ~ 2 weeks

  18. 115 kV Outage Condition B Western Maine – Original Plan – 2nd Outage • 115 kV Outage Condition B Western Maine originally planned to go on outage concurrent with Outage K in 1st Qtr 2014 • Duration ~ 2 weeks • Some generators have DNE Limits • Removes 2 paths from Wyman Hydro Export Interface • Interface limits • Inner Rumford Export Interface 85 MW – 215 MW • Outer Rumford Export Interface 85 MW – 275 MW • Wyman Hydro Export Interface 75 MW - 100 MW CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  19. 115 kV Outage Condition B Western Maine – Original Plan – 2nd Outage • Moved Outages so they do not occur at same time to reduce generation impacts • Moved another serial outage, that has similar limits, to occur at the same time to reduce generation impacts • Reduced duration of restrictions by 4 days • Interface limits • Inner Rumford Export Interface 85 MW – 215 MW • Outer Rumford Export Interface 85 MW – 275 MW • Wyman Hydro Export Interface 200 MW – 240 MW • Last long duration MPRP outage in the Western Maine area • The Rumford SPS will be removed from service after this outage CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  20. 345 kV Outage Condition L Central Maine • 1st and 2nd Qtr 2014 ~ 7 weeks • Interface Limits • New Brunswick – New England - 700 MW • Orrington South – 700 MW – 1200 MW • Maine-New Hampshire – 1300 MW – 1600 MW CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  21. 115 kV Outage Condition M Western Maine • 2nd Qtr 2014 ~ 9 days • Currently evaluating options to reduce duration • Interface Limits • Wyman Hydro Export 240 MW

  22. 345 kV and 115 kV Outage Condition N Central Maine • 2nd Qtr 2014 ~ 1 week • Multiple facility out condition required to complete work • Moved original schedule from mid 2nd Qtr to end of 2nd Qtr to minimize impact to generators • Interface Limits • Wyman Hydro Export 200 MW – 250 MW

  23. 345 kV Outage Condition O Northern Maine • Most difficult outage to coordinate in New England • Historically Requires: • 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

  24. 345 kV Outage Condition O Northern Maine • Potential options to be assessed due to partial MPRP completions: • 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 • 1st outage 3rd Qtr 2014 ~ 1 week • 2nd outage 4th Qtr 2014 ~ 2 weeks • 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

  25. 345 kV Outage Condition P Southern Maine • 3rd Qtr 2014 ~ 1 week • Interface Limits • Surowiec South Interface Limits 450 MW – 500 MW • Moved to overlap 1st Outage O because of Orrington South Interface Limits

  26. 345 kV Outage Condition Q Southern Maine • 4th Qtr 2014 ~ 4 weeks • Interface Limits • Surowiec South Interface Limits 450 MW – 500 MW • May be able to be moved to overlap 2nd Outage O to because of Orrington South Interface Limits • Timing is driven by environmental considerations

  27. 345 kV Outage Condition R Southern Maine • 1st Outage 3rd Qtr 2014 ~ 2 weeks, 2nd Outage 4th Qtr 2014 ~ 2 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

  28. 115 kV Outage Condition S Central Maine • 4th Qtr 2014 ~ 2 months • Interface Limits • Wyman Hydro Export Interface Limits 50 MW – 75 MW • Substantial impact to generators for a long duration • Evaluating a number of construction options to mitigate this exposure • Will update for Fall 2014 meeting

  29. 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 • Interface Limits • Orrington South Interface limit TBD • Will update for Fall 2014 meeting

  30. CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  31. References MPRP Geographic Overview Significant Maine Interfaces

  32. MPRP Geographic Overview CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  33. 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 CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  34. 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 CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  35. 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 CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  36. 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 CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  37. 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 (post-fault voltage recovery) • Facility out limits • 0 MW – 120 MW • Behind the constraint . . . • ~320 MW of generation • ~ 90 MW more proposed CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  38. 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 CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  39. 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 . . . • ~1250MW of generation • ~ 360 MW more proposed CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  40. 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 CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  41. 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 CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

  42. 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 CONTAINS CRITICAL ENERGY INFRASTRUCTURE INFORMATION – DO NOT RELEASE

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