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Northeast Reliability Interconnect Project As presented to NEPOOL RC on 7/12/04

Northeast Reliability Interconnect Project As presented to NEPOOL RC on 7/12/04 For 15.5/12C/TCA Approval. Presentation Objective. Address the CMP questions Review updated ISO-NE Congestion analysis 12C/15.5/Transmission Cost Allocation (TCA) motion and approval. Preferred Solution.

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Northeast Reliability Interconnect Project As presented to NEPOOL RC on 7/12/04

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  1. Northeast Reliability Interconnect Project As presented to NEPOOL RC on 7/12/04 For 15.5/12C/TCA Approval

  2. Presentation Objective • Address the CMP questions • Review updated ISO-NE Congestion analysis • 12C/15.5/Transmission Cost Allocation (TCA) motion and approval

  3. Preferred Solution • Northeast Reliability Interconnect Project as 345 kV path between Orrington and Pt. Lepreau Project Includes - • A 345kV transmission line between Orrington and Pt. Lepreau • Mechanically Switched Series Compensation on S388 south of Orrington • 115kV Breaker upgrade at Maxcys due to short circuit currents • Shunt capacitor installation at CMP substations Gulf Island and Kimball Rd • SPS upgrades and changes

  4. ISO-NE Congestion analysis presentation

  5. Benefits of Preferred Solution • Strengthens a section of a very weak 345 kV path • Reduces contingencies that separate Maritime Provinces from Eastern Interconnection • Eliminates GCX SPS • Increases Maritimes to Orrington capability from 700 MW to 1000 MW • Increase in resource capacity and energy available to New England (Orrington South flows due to Orrington-Maxcys series compensation) • Parallel path transmission

  6. Benefits of Preferred Solution • Reduces losses between Orrington and New Brunswick • Facilitates opportunities to improve/create other parallel paths and additional transfers • Provides NEPOOL with improved fuel diversity • Increased New England-New Brunswick transfer capability could provide opportunities for locked-in generation in Maine – especially given Maritimes winter peak • Future potential for increased sharing of ancillary services with New Brunswick

  7. ISO-NE Congestion Analysis • Congestion analysis performed by ISO-NE looking at the addition of the NRI and flow opportunities that are a result of it • Values are cumulative 6 year based on own year values • Cumulative NE Generator Production Cost Savings - $31M • Cumulative NE Net LSE Expense - $99M

  8. Closing • The Northeast Reliability Interconnect is the only alternative available to address all the reliability issues described • The NRI also provides a range of economic opportunities • This line is a critical step in strengthening the northern New England transmission system • FERC has indicated that apportioning the reliability benefits of transmission projects is impractical and thus it is appropriate to socialize the cost of projects to ensure they are constructed • FERC has also noted the value of increasing transfer capability between control areas • It is important to seize the opportunity to construct transmission infrastructure as it is becoming increasingly difficult to acquire required permits • This reliability based project merits 100% regional funding support

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