The consideration of atmospheric stability within wind farm AEP calculations

WindEurope Summit 2016

Schmidt, Jonas^1 ; Chang, Chi-Yao^1 ; Dörenkämper, Martin^1 ; Salimi, Milad^2 ; Teichmann, Tim^3 ; Stoevesandt, Bernhard^1

Fraunhofer IWES, Küpkersweg 70, Oldenburg

26129, Germany^1

Technische Universität Cottbus, Platz der Deutschen Einheit 1, Cottbus

03046, Germany^2

Nordex Energy GmbH, Langenhorner Chaussee 600, Hamburg

22419, Germany^3

关键词: Annual energy productions;    Atmospheric stability;    Computational fluid dynamics simulations;    High-fidelity simulations;    Mean wind speed;    Reynolds similarity;    Simulation data;    Transformation model;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/749/1/012002/pdf
DOI  :  10.1088/1742-6596/749/1/012002

来源: IOP

【 摘 要 】

The annual energy production of an existing wind farm including thermal stratification is calculated with two different methods and compared to the average of three years of SCADA data. The first method is based on steady state computational fluid dynamics simulations and the assumption of Reynolds-similarity at hub height. The second method is a wake modelling calculation, where a new stratification transformation model was imposed on the Jensen an Ainslie wake models. The inflow states for both approaches were obtained from one year WRF simulation data of the site. Although all models underestimate the mean wind speed and wake effects, the results from the phenomenological wake transformation are compatible with high-fidelity simulation results.