HQT Challenges and Projects 2008

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Power Transmission in Québec Challenges and Projects Challenges and Projects Montreal, February 12, 2008

Transcript of HQT Challenges and Projects 2008

  • Power Transmission in Qubec

    Challenges and ProjectsChallenges and Projects

    Montreal, February 12, 2008

  • Hydro-Qubec's Transmission System

    Large hydroelectricLarge hydroelectric power plants located

    more than 1000 km from the main consumption

    2

    pcenters

  • Transmission System Characteristics

    Voltage Lines (km) Substations (nb.)} Two main corridors connecting the remote hydroelectric

    765 and 735 kV 11 422 38450 kV c.c. 1 218 2315 kV 5 127 63

    the remote hydroelectric generation sites located in the north of the province to the major load centers located in

    230 kV 2 976 50161 kV 1 877 40120 kV 6 600 21369 kV and lower 3 606 102

    major load centers located in the south (Montral Qubec)

    } Almost unique in length and l it Total 32 826 508

    (december 31, 2006)

    complexity

    } Asynchronous interconnections with neighbouring systemswith neighbouring systems

    } Stability limits on the major transmission corridors

    The 735 kV system is the infrastructure that connects together the remote major generation centers the load

    } Maximum load ~ 36000 MW

    } Minimum load ~ 14000 MW

    major generation centers, the load centers and the regional transmission networks

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  • Power Transmission

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  • Interconnections with Neighboring Systems

    Import capacity Export capacityNeighboring system Number

    Ontario 6 1 295 MW720 MW

    New York 2 2,125 MW1,000 MW

    Ontario 6 1,295 MW720 MW

    New England 3 2,305 MW1,870 MW

    New Brunswick 3 1,200 MW785 MW

    Newfoundland 0 MWNewfoundland and Labrador

    1 5,200 MW 0 MW

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  • Interchanges with Neighboring Systems

    } By isolating generating unitsy g g g(e.g., Beauharnois generating station)

    Beauharnois generating stationGeneration can be islanded

    } By isolating the neighboring system load

    } By using DC interconnections: High-voltage DC converters

    (e.g., Chteauguay)

    DC lines(e.g. the Multiterminal Direct-Current System)Chteauguay substation

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    System)Chteauguay substationDC converter

  • Main Challenges in the Coming Years

    } Increasing level of investments in the transmission gsytem (demand growth and new generation projects)

    } Increasing electricity sales outside Quebec (sales in} Increasing electricity sales outside Quebec (sales in 2006: 14, 5 TWh)

    } I i tili ti f t t i l di} Increasing utilization of system assets, including interconnections

    } Optimal risk management strategies for maintaining, refurbishing, retiring and replacing aging transmission assets while maintaining system reliability andassets while maintaining system reliability and continuity of service

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  • Investments in the Transmission System

    Connection of 990 MW

    Investments over 1 G$ per year during the next yearsy g y

    New hydro and wind power plantsNew interconnection with OntarioS t l t bilit

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    System long-term operability

  • System Investments

    Long-term investments : more than 1 G$/yearLong term investments : more than 1 G$/year

    1600Growth

    1200

    1600

    s

    $

    Maintenance

    400

    800

    M

    i

    l

    l

    i

    o

    n

    0

    400

    2007 2008 2009 2010 2011 2012 2013

    99

  • System Investments (2)

    Challenges:

    } Many major projects: total investments of 1,2 G$ in 2008 (including 350 M$ for long-term operability)

    From 2008 to 2015:

    } Increasing number of projects in order to meet demand growth and} Increasing number of projects in order to meet demand growth and long-term system operability require an integrated intervention strategy

    } Integration of nearly 1000 MW of wind power projects in the Gasp peninsula

    } Grid integration of 2000 MW of additionnal wind power plants} Grid integration of 2000 MW of additionnal wind power plants

    } Regional transmission systems

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  • System Reliability and Asset Management

    Aging transmission assets

    15 %

    g g

    32 %Substations

    2007 2017

    25 % U f l lif t d dUseful life exceeded

    Lines

    2007 2017

    25 %43 %

    Useful life not exceededLines

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  • Reliability and Long-term Operability of Assets

    Challenges:

    } Operating a system more and more sollicited (lesswindows for maintenance)windows for maintenance)

    } Optimal risk management strategies for maintenance and refurbishment/replacement of aging assetsrefurbishment/replacement of aging assets

    } Integration of growth and refurbishment projects in investment decisionsinvestment decisions

    } Long-term operability of strategic assets (protection t DC i t ti d SVC i d fsystems, DC interconnections and SVCs required for

    system security)

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  • Interconnections

    More energy available for electricity sales outside Quebec

    220

    230Availability for

    210

    220 sales

    Contracts outside

    190

    200Contracts outsideQC

    H it l d180

    190 Heritage pool andothers QC

    170

    2007

    2008

    2009

    2010

    2012

    2014

    2015

    2017

    2020

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    20 20 20 20 20 20 20 20 20

  • Interconnections (2)

    Challenges:

    } Long-term operability of existing interconnections} Constr ction of a ne interconnection ith Ontario} Construction of a new interconnection with Ontario} 16 TWh available for electricity sales outside of Quebec

    in 2008in 2008

    } New generation projects: Integration of 3000 MW of wind power Integration of new hydro plants: La Romaine, La Sarcelle,

    EastmainEastmain

    Additionnal power from existing hydro plants: La Grande complex, Manic 3

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    complex, Manic 3

  • Innovation and Efficient Operations

    Challenges:

    } Impacts of implementing new technologies Remote monitoring and remote maintenance systems Compact protection systems buildings Wireless data transmission substations Load tap changers diagnostics p g g

    } Projects cost and content optimization

    } Productivity gains to capture in order to control operations expenses

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  • Thank you for your attention.