Evaluation of the global-blockage effect on power performance through simulations and measurements

In this work, we investigate blockage effects due to the interaction of five wind turbines in a row through both simulations and measurements. Additionally, we investigate whether these power deviations have an effect on power performance tests, which are carried out at sites consisting of several turbines in a row. Our numerical results show consistent power deviations when compared to the case of a single isolated wind turbine. These numerical results are confirmed by the measurements, which show that the power output changes with the wind direction due to the interactions between the turbines in the row. Therefore, power performance tests might be biased when conducted on such an array.