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wind_investment_notes.txt
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wind_investment_notes.txt
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Use of weibull - extreme values - fat tails compared to
Issue of forming the prior:
-prior based on previous knowledge - are the wind resources good in this area
-Based on general wind map - from met office for example.
Issue bi-modal distribution of power:
- depends on the choice of wind turbine
- some may have different power curves
- uncertainty - choose between different wind power based on wind choices
- some may be better at steady, low wind speeds
- some operate better with gusty conditions
Issue of correlation between wind production and power prices
- areas of gusty wind conditions - are these likely to be periods with lots of wind power and lower prices.
- prior about how future wind prices will be
P = 1/2*rho*A*v^3
A- rotor swept area pi*r^2
rho + air density
Vestas V90 - 3.0 MW
http://www.vestas.com/en/products_and_services/turbines/v90-3_0_mw#!technical-specifications
The V90-3.0 MW® IEC IA/IIA is a great choice for high- and medium-wind sites with high turbulence. It is designed for easy transportation and installation while reducing foundation costs thanks to its lower load.
OPERATIONAL DATA
Rated power
3,000 kW
Cut-in wind speed
3.5 m/s
Rated wind speed
15 m/s
Cut-out wind speed 25 m/s
Re cut-in wind speed 20 m/s
Wind class
IEC IA/IIA
Operating temperature range standard turbine -20˚C to 40˚C
Operating temperature range low temperature turbine
-30˚C to 40˚C
SOUND POWER
(Mode 0, 10 m above ground, hub height 80 m, air density 1,225 kg/m³)
4 m/s 97.9 dB (A)
5 m/s 100.9 dB (A)
6 m/s 104.2 dB (A)
7 m/s 106.1 dB (A)
8 m/s 107.0 dB (A)
9 m/s 106.9 dB (A)
ROTOR
Rotor diameter
90 m
Swept area
6,362 m2
Nominal revolutions 16.1 rpm
Operational interval 8.6 - 18.4 rpm
Air brake full blade feathering with 3 pitch cylinders
V100-2.0 MW™ at a Glance
The V100-2.0 MW™ IEC IIB turbine allows you to increase productivity by opening up low- and medium-wind sites which were previously regarded as non-viable. To maximise power output at such locations, the turbines' 100 m rotor gains more from the available wind – starting at an incredibly low 3 m/s. Thanks to the 49 m blades, the turbines deliver a notable rotor-to-generator ratio producing a remarkable capacity and yield at low- and medium-wind sites.
OPERATIONAL DATA
Rated power
2,000 kW (50/60 Hz)
Cut-in wind speed
3 m/s
Rated wind speed
12 m/s
Cut-out wind speed 22 m/s
Wind class
IEC IIB
Operating temperature range standard turbine -20˚C to 40˚C
Operating temperature range low temperature turbine
-30˚C to 40˚C