Transcript www.naruc.org

Updated 1/28/2011
Renewables
Integration
Plans and
Challenges
March 8, 2011
Jay Caspary
[email protected] · 501.614.3220
New vision of transmission
• In the past, built least-cost transmission to meet local needs
• Today, proactively building “superhighways” to benefit region:
– Facilitate adding new generation to grid, including renewables
– Improve electric reliability, operational efficiencies, and access to
lower-cost and diverse generation resources
– Enable wholesale energy markets to be more competitive
– Contribute to economic success beyond electric industry
– Reduce land use impacts
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More
Finding Balance
SPP Today
Minimum for Reliable
Delivery to Customers
Expand Transmission
Investment
More
Transmission
Needed
Less
Customer Energy Cost
Less
Amount of Transmission
More
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Integrated Transmission Planning
• Goal: Design transmission backbone to connect load to
most reasonable generation alternatives
– Strengthen ties to Eastern, possibly Western Interconnections
– Promote transmission investment to meet reliability, economic,
and public policy needs
• Horizons: 20, 10, and 4 year
• Focus: Regional, integrated with local
• Resulting in: Comprehensive list of needed projects for SPP
region over next 20 years
– With 40 year financial/economic analysis
• Underlying Value: Reliability and Economics are inseparable
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2010 Plan for 2030
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Other Transmission Planning
•
•
Generation Interconnection Studies
–
Determines what transmission is needed
to connect new generation to grid
–
Doesn’t include transmission service
Aggregate Studies
–
Determines what transmission is needed
meet requests for transmission
service
–
Shares costs of studies and new
transmission
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Projects Constructed 2005-2009
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Projects with Notifications to Construct
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Regional Plans
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Annual Average Wind Speed - 80 meters
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Wind In Service
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Generation Interconnection Requests
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Annual Average Wind Speed - 80 meters
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EWITS Scenario 2 Supporting 20% RPS
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Merchant Developers like Clean Line are
Proposing Large HVDC Projects
Recent Studies Regarding Wind Issues
•
SPS Wind Penetration Study
•
SPP Wind Integration Task Force Study
•
Nebraska Power Authority Wind Study
•
EWITS Scenarios with 20% - 30% National RES which
results in 150GW of wind in plains
•
EPRI PRISM/MERGE Analyses 2009 Update
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Wind May Be Carbon Free, But…
•
Existing thermal fleet, particularly base load design
fossil units, provide optimal economic performance
and least environmental impacts at rated capacity
without cycling, ramps, start-ups, and degrading
performance over time
•
Stakeholders and affected parties needs to understand
the impacts of renewable resources on net load
shapes for dispatchable resources and operating
efficiencies including increased emissions per unit of
output for fossil fleet
•
Value of accurate forecasting and proactive
management of wind injections is understated
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Wind May Be Carbon Free, But… (cont.)
•
Value transmission expansion to capture and manage
diversity of intermittent resources must be quantified
for system security and market operations, e.g.,
ancillary services.
•
Perfect forecasts understate environmental impacts,
cycling duties, unit inefficiencies, etc.
•
Marginal cost based, economic planning studies do not
capture market based solutions or real economic
impacts and consequences, so…
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