hqt challenges and projects 2008
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Power Transmission in Qubec
Challenges and ProjectsChallenges and Projects
Montreal, February 12, 2008
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Hydro-Qubec's Transmission System
Large hydroelectricLarge hydroelectric power plants located
more than 1000 km from the main consumption
2
pcenters
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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
4
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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
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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
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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
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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
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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
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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.
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