UBC ATSC 313 Renewable Energy Meteorology

Theme: Wind Power

Module
Syllabus   Learning Goals
A B C D 06
Topic: 
Subject
Large-scale Wind Patterns 
   By the end of this module, you will be able to:

X


a. Intro to wind turbines
Locate on a BC map the three main regions having wind farms, and summarize typical characteristics of hub height, blade diameter, and power
X



b. Forces
Explain the nature and direction of each atmospheric force, and calculate their magnitudes based on weather maps and other data.
X



c. Winds
Determine and explain the wind speed, direction, and characteristics of geostrophic, gradient, and boundary-layer winds.


X

d. Global & monsoon winds
Name and describe the winds associated with the general circulation and monsoons, and explain why various locations are good or bad for wind turbines.  
X



e. Down-mixing of jet-stream winds
Explain how jet streams form and affect weather at the surface, and discuss three processes that can mix jet-stream winds down to the surface
X



f. Highs, lows, fronts & sting jets
Describe and draw maps of how the wind direction and speed change depending on the location relative to highs, lows, and fronts. Also explain the characteristics of sting jets.



X
g. Synoptic-scale wind storms
Describe the synoptic and mesoscale characteristics, and wind hazards, associated with strong extratropical cyclones that hit southwestern BC.
X



h. Thunderstorm winds 1 - gust fronts
Describe and estimate atmospheric variables associated with downbursts, outflow winds and gust fronts, which can affect wind farms.
X



i. Thunderstorm winds 2 - derechos & tornadoes Discuss the characteristics of rear-inflow jets, bow echoes, derechos, tornadoes, and other hazards that can affect wind farms.




.

.
A
B
C
D
07
Topic: 
Subject
Turbulent Boundary Layer
   By the end of this module, you will be able to:
X



a.
Descriptive overview
Sketch the components of the atmospheric boundary layer including how they vary in space in time, calculate the potential temperature, and describe how it is used in meteorology.
X



b.
Soundings & thermo diagrams
Plot sounding data on a skew-T and tephigram, and use a thermo diagram to determine the change of state and buoyancy of rising and descending air parcels.
X



c.
Static & dynamic stability
Discuss classifications of atmospheric flow and stability, and use soundings to determine dynamic and nonlocal static stability and flow characteristics



X
d.
Turbulence kinetic energy & convection
Use fast-response atmospheric data to calculate turbulence statistics including turbulence kinetic energy (TKE), and determine the convective nature of the boundary layer. Also, use the Pasquill-Gifford method to estimate the nature of turbulence.
X



e.
Boundary layer winds
Explain how winds at different heights in the boundary layer evolve during a daily cycle. Also, plot and interpret winds on a hodograph.



X
f.
Similarity theory winds
Describe and calculate variables that quantify turbulent flow (drag, stress, friction velocity and roughness length) and calculate wind speed vs. height in the surface layer as a function of these variables.



X
g.
Power law, NWP, & turbine-average winds
Use the power-law wind profile and use NWP gridded forecasts to calculate hub-height wind speed and turbine-average wind speed for statically neutral boundary layers.



X
h.
Low-level jet
Describe the characteristics of the low-level jet (LLJ), explain how the inertial oscillation and baroclinicity can create LLJs, describe how LLJs affect wind farms.

X


i.
Large-eddy simulation & the turbulence spectrum
Define the scales of motion that apply within the atmospheric boundary layer, explain how a Discrete Fourier Transform (DFT) can inform us about the turbulence spectrum, and explain the purpose of large-eddy simulation (LES) models. .

X


j.
Turbine wakes & internal boundary layers  
Explain how turbulent turbine wakes affect winds at wind-farms , and how the wind farm modifies the atmospheric boundary layer.

X


k.
IEC wind turbine classes Explain the utility of IEC Classes.  Determine the appropriate Wind Turbine Class from wind and turbulence information.  Calculate useful engineering approximations to normal and extreme winds and turbulence that can affect wind turbines




.

.
A
B
C
D
08
Topic: 
Subject
Orographic & Local Winds
   By the end of this module, you will be able to:


X

a.
Measuring winds with anemometers and Doppler lidar
Describe the main in-situ and remote sensors used on turbine nacelles and on meteorological towers.


X

b.
Wind variability, frequency, roses
Describe and plot wind roses, frequency distributions, and Weibull and Rayleigh distributions from time series data.

X


c.
Mountain waves, wakes and Froude number
Discuss the meaning of the Froude number, calculate its value, and use it to explain phenomena associated with air flow over mountains

X


d.
Wind acceleration & turbine wakes over ridges
Explain wind acceleration and wake turbulence over idealized hills with different slopes, and identify good and bad locations to install wind turbines.

X


e. Bernoulli's equation
Explain each term in Bernoulli's equation and the related energy-budget equations, describe under what conditions these equations can be used, and use them in calculations that relate wind speed to the other variables in those equations

X


f.
Downslope windstorms
Describe the formation and characteristics of fall winds including bora, chinook, Foehn, and other downslope windstorms. Also, be able to calculate potential temperature and use isentropes to analyze these phenomena.

X


g.
Gap winds
Identify locations likely to have gap winds, outflow winds, and barrier jet winds, calculate their speeds, and explain their relevance to wind energy.

X


h.
Anabatic, katabatic, mountain, valley & seabreeze winds
For anabatic winds, katabatic winds, sea breezes, and other thermal circulations, describe how they work, calculate their speeds, and explain their relevance to wind energy.

X


i.
Mapping wind-power potential
Describe the Global Wind Atlas, and use it to locate regions of high wind-resource potential.




j.






.

.
A
B
C
D
09
Topic: 
Subject
Wind-power Forecasting
   By the end of this module, you will be able to:


X

a.
Numerical weather prediction - part 2
Explain how atmospheric phenomena can be approximated via finite differences and parameterizations to make a weather forecast, and discuss NWP limitations and errors.


X

b.
Numerical weather prediction - part 3
Describe the steps in the numerical weather prediction process and explain how they work.


X

c.
Ensemble & probabilistic wind forecasts - part 2
Describe systematic and random errors in NWP models, including the theory of atmospheric "chaos", and explain how calibrated ensemble forecasts reduce these errors.


X

d.
Forecast skill and verification methods
Calculate verification statistics for deterministic and probabilistic forecasts, determine the forecast quality using those statistics, and make sound decisions based on the costs associated with different decision options. Also explain the NWP spin-up issue.


X

e.
Power curve: idealized & Betz limit
Calculate the power produced by a wind turbine as a function of wind speed, and explain how this relates to cut-in speed, rated speed, cut-out speed, pressure, density, and turbine efficiency relative to Betz limit.


X

f.
Wind-farm average power curve, annual energy production & capacity factor
Explain how expected value is used to estimate wind resource potential, and calculate annual energy production and capacity factor for individual turbines and for whole wind farms.



X
g.
Statistical post- processing & machine learning - part 2
Describe 5 methods of statistical post-processing of NWP wind forecasts, and explain their pros and cons. Also, list some of the other secondary products that can be produced in post-processing.


X

h.
Dispatchability & Markets
Explain the concepts and usage of dispatchability, wind-plus-storage, power purchase agreements, and the role of Renewable Energy Certificates (RECs) in the energy market.
X



i.
Threats & hazards to wind turbines
Describe the eight weather-related threats and hazards to wind turbines, and explain what mitigation or protective action is possible.



X
j.
Concerns & stakeholders
Describe the role of environmental impact assessments and community engagement for wind-farm projects. Also, describe typical stakeholders and non-fraudulent concerns associated with wind turbines.


X

k.
Climate change impacts on wind power
Describe how climate change is expected to change large-scale circulation patterns, the expected impacts on wind potential, and the uncertainty in these projections




l.






.

.