Large Wind Turbines Technology Lee Jay Fingersh BLM WEATS August 31, 2010.
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Transcript of Large Wind Turbines Technology Lee Jay Fingersh BLM WEATS August 31, 2010.
Large Wind Turbines TechnologyLarge Wind Turbines Technology
Lee Jay FingershLee Jay Fingersh
BLM WEATSBLM WEATS
August 31, 2010August 31, 2010
Constant versus Variable speed
• Constant speed is cheaper
• Constant speed is easier to implement
• Variable speed can collect more energy
• Variable speed can control loads better
Tower type
• Considerations:– Maintenance– Tower Shadow– Transportation
Lattice (2 MW)
Tubular (600 kW)
Number of blades• Odd number is better for mechanical dynamics and aesthetics• Three blades
– Most common
• Two blades– Must spin faster for the same energy– Faster = more noise– Save the cost of one blade (significant)
• One blade– Same concerns and benefits as with two blades– Also require a counterweight
• http://www.windpower.org/en/tour/design/concepts.htm
http://www.windpower.org/en/tour/design/concepts.htm
Effect of forecasting on storage
"Battery only" storage system
0.03
0.04
0.05
0.06
Battery only system With CAISO load forecasting With perfect wind forecasting andCAISO load forecasting
CO
E (
$/kW
h)
0
0.5
1
1.5
2
2.5
3
3.5
Battery S
ize (ho
urs)
COE (system) COE (wind only) Battery size
“Battery and H2” and “H2 only” systems
Systems with H2 storage included
0.04
0.05
0.06
0.07
0.08
0.09
Battery and H2 system H2 only system
CO
E (
$/kW
h)
0
0.5
1
1.5
2
2.5
Battery S
ize (ho
urs)
COE (system) COE (wind only) Battery size
Same battery size and COE as "Battery Only" system with forecasting because
optimizer optimized H2
system to zero size
System designed for hydrogen production
Costs and revenue with and without hydrogen production
0
5
10
15
20
25
30
Battery and H2 system Nohydrogen production
Battery and H2 system withhydrogen production
H2 only system with hydrogenproduction only - no electricity
Rev
enu
e (M
$/ye
ar)
0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
CO
E ($/kW
h)
Electricity Hydrogen Capacity COE
Storage conclusions• It is possible to “firm up” wind power for a
roughly 10% increase in COE.– Using batteries is cost effective– Using hydrogen systems alone is not cost effective
because the closed-cycle efficiency is too low– Hydrogen production can be simultaneously
accomplished and is cost effective– Hydrogen production alone is less cost effective
• Control strategy and proper system sizing are very important
• With further investigation, it may be possible to do much better