Planning for Renewable Energypeople.ece.umn.edu/groups/wind/windworkshop2006/Skarbakka - Uo… ·...
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1 Planning for Renewable Energy Glen Skarbakka Great River Energy Workshop on Renewable Energy for Minnesota October 12, 2006
Transcript of Planning for Renewable Energypeople.ece.umn.edu/groups/wind/windworkshop2006/Skarbakka - Uo… ·...
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Planning for Renewable Energy
Glen SkarbakkaGreat River Energy
Workshop on Renewable Energy for MinnesotaOctober 12, 2006
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Great River Energy Overview
A Generation & Transmission Cooperative28 Member Distribution Cooperatives600,000 Distribution CustomersLong term growth rate ~3%Summer peaking (~2600 MW)
2005 Energy Growth
0-2%8%+
6-8%
4-6%
2-4%
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0150300450600750900
1050120013501500165018001950210022502400
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2001
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/200
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25/2
001
2/6/
2001
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/200
13/
2/20
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3/14
/200
13/
26/2
001
4/7/
2001
4/19
/200
1
5/1/
2001
5/13
/200
15/
25/2
001
6/6/
2001
6/18
/200
16/
30/2
001
7/12
/200
17/
24/2
001
8/5/
2001
8/17
/200
1
8/29
/200
19/
10/2
001
9/22
/200
110
/4/2
001
10/1
6/20
0110
/28/
2001
11/9
/200
111
/21/
2001
12/3
/200
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/15/
2001
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1200 MW
1200 MWJune - July
GRE is very summer peaking
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GRE’s Supply Portfolio
CapacityEnergy
CoalGasOilWindHydroRDFPurch
*nameplate rating
*
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GRE Generating Facilities
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Wind Power Purchases
<2005: 3 x 6 MW projects = 18 MW2005: Trimont = 100 MW2007: High Prairie = 100 MW
High Prairie
Trimont
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0%
2%
4%
6%
8%
10%
12%
14%
2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015
% o
f Ene
rgy
PlannedExist & CommittedREO
GRE is meeting MN's Renewable Energy Objective
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Coping with growth
100 MW / yr
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Environment
Reliability Cost
Planning Objectives
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Environmental Targets
By 2020:Supply 20% of energy with renewablesReduce CO2 emissions to 2000 levels
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The olden days: a physical world
GRE Member Loads
GRE Generators
GRE Gen=
GRE Load
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Midwest ISO
Operates transmission and energy markets.
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Today: a financial world
MISO
GRE Member Loads
MISO MidwestIndependent System Operator
GRE Generators GRE Gen≠
GRE Load
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Market Prices: temporal volatility
($50)
$0
$50
$100
$150
$200
$250
$300
$350
7/31/06 8/1/06 8/2/06 8/3/06
LMP
$/M
Wh
GRE.GREReal-time LMP
Monday WednesdayTuesday
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Market Prices: spatial volatility
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Wind Site Value: Cost v. Revenue
Wind Resource→ Cost of Wind
Market Price (LMP)→ Revenue from Wind
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Queued Generating Projects
3443 MW
10,978 MW
12,572 MW
MISO Generator Interconnection Queue 9/26/06
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Wind Development Issues
SitingEnergy ValueGeographic diversityTransmission availability
TimingTransmission interconnection arrangementsFederal Production Tax Credit deadlines
CostEquipment & installation
TechnicalEquipment reliability (long term)Wind integration / ancillary services
Project SizeEconomies of scale v. small developer preference
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Other renewables
BiomassWaste streams
Municipal wasteWaste woodAg wasteLandfill gas
Energy cropsSwitchgrass, trees, etc.
Co-firing
HydroSolar
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Basalt Formations
Saline-Filled Sedimentary Formations
MajorBit and SubbitCoal Basins
Depleting Oil Fields
Depleting Gas
Basins
Existing Coal PlantsAnnounced Coal Plants
Other ways to reduce CO2
CO2 capture & sequestration
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Other ways to reduce CO2
CO2 capture & sequestrationImproved power plant efficiencies"Energy Factories"
Combined heat and powerpower production <--> industrial process
Coal to liquids or syngas
Distributed Gasification Combined CycleNuclearPoint of use generationConservation!
