Comparison metrics microscale simulation challenge for wind resource assessment — what to watch out for in Stage 1

Status

The deadline for this benchmark has been moved from September 30th, 2020 to December 31st, 2020!

New time plan

The benchmark was launched on April 1st, 2020, and will be open for participation until December 31st, 2020. Interim results will be presented and discussed at the Wind Energy Science Conference in May, 2021. Final results will be presented at the Torque2022 conference. Register for the challenge here.

Watch out for

Here we would like to summarise the things you need to watch out for when carrying out this challenge:

• Make sure you have downloaded the most recent met mast data from the B2DROP link that we provide you with following registration!!
• Note that each sensor on met mast 29 is oriented differently relative to North, and you have to correct the data for this before inputting it into your simulations.
• You can find a diagram showing the definition of the sensor reference frame in the B2DROP folder. The angle defining the sensor reference frame orientation (alpha) is provided for each sensor in the .nc file. You need to define a consistent reference frame for your simulations and then resolve the wind speed components in this reference frame. e.g. we use this conventional reference frame and resolve u_sensor and v_sensor to u and v:

• When you fill .xlsx files, you can choose to use your own definition of what u and v are, however, you then need to tell us what your coordinate system is when you submit your Model Description, so that we can compare your results with other results.
• In the .xlsx files, it does not matter if your sectors do not match up with ours. For example, WAsP’s sectors are automatically centred around 0°, 30°, 60° etc. whereas ours are centred around 15°, 45°, etc. This does not matter as long as you tell us your definitions in the Model Description!
• Please check the feasibility of your submitted data by comparing the wind speed and direction vs. height for each wind direction sector with the provided met mast data at the position of met mast 29! They should match.
• You CAN use the topology and roughness data provided at the link in the original blog article (https://perdigao.fe.up.pt/maps), but you don’t have to. You can use your own data if you want.
• You should use the power curve provided at the link in the original blog article to calculate the Annual Energy Production. Use a hub height of 78 m.
• The first Excel sheet mentioned in the original blog article (nameID_modelID_simXX_z.xlsx) is mandatory; the other two (nameID_modelID_simXX_xy.xslx, nameID_modelID_simXX_xyz.xlsx) are optional.

We look forward to receiving your submissions! Please let us know if you have any more questions: sarah.barber@ost.ch