Institut für Energietechnik (IET)
HSR

Comparison metrics simulation challenge

A public "simulation challenge" for wind energy sites in complex terrain will be implemented, in which participants submit simulation results in a pre-defined template. Hundreds of comparison metrics data both before and after carrying out simulations will be collected, enabling transfer functions for the accurate prediction of tool suitability to be developed and helping modellers choose the best model for a given wind energy project.

This public challenge will be open to the international community and has a pre-study and two stages:

Pre-study: Evaluation of template (Bolund Hill) - Oct 2019 - Dec 2019

Participants can download a template for the Bolund Hill blind comparison here and upload their results as a ZIP file including the completed template and a description of their modelling method here. The template should be self-explanatory. Inpput conditions are given on the Bolund Hill website.

Please get in touch with Sarah Barber for the password if you would like to take part.


Stage 1: Open data complex terrain (Perdigão site) - Apr 2020-Sep 2020
In this stage, the participants will submit their results in a pre-prepared table allowing us to calculate weighted parameters related to the skill scores and costs both before and after carrying out the simulations. The simulation case will be clearly defined to allow all the results to be compared with each other. The Perdigão site in Portugal, consisting of flow over a double ridge, has been chosen due to its relative complexity combined with the high number of field tests and open measurement data available for validation. All the results will then be plotted on one graph and may look something like Figure 1(a), where each point represents one tool. The clusters are ex-pected due to different category of tool (e.g. linear model, RANS-CFD, LES-CFD). As can be seen, there will be a discrepancy between the metrics predicted beforehand and those deter-mined using the results of the simulations. Transfer functions to better predict the skill scores and costs will be developed based on these results.

Stage 2: Open test cases - Jul 2020-Mar 2021

In this stage, the participants will also submit their results in a pre-prepared table allowing us to calculate weighted parameters related to the skill scores and costs both before and after carrying out the simulations. However, in this case, no particular test case will be pre-defined, allow-ing us to collect a much wider range of different sites and external conditions. The results will be clustered according to different categories of input conditions and may look something like Figure 1(b). In this figure, only the best-fit lines through the data are shown, and an example for only two different categories is shown for simplicity. Transfer functions to better predict the skill scores and costs will be developed based on these results.

This project is funded by the Swiss Federal Office of Energy and is being carried out in collaboration with IEA Wind Task 31 (October 2019 to October 2021).

Further information coming soon!

News

Read our new article about the project in the blog "The Wind Vane" here!