Wind Speed Estimation and Parametrization of Wake Models for Downregulated Offshore Wind Farms within the scope of PossPOW Project

The Science of Making Torque from Wind 2014

Bozkurt, Tuhfe Göçmen^1 ; Giebel, Gregor^1 ; Poulsen, Niels Kjølstad^2 ; Mirzaei, Mahmood^2

Technical University of Denmark, Department of Wind Energy, Risø, Denmark^1

Technical University of Denmark, Department of Applied Mathematics and Computer Science, Lyngby, Denmark^2

关键词: Calibrated model;    Down-regulation;    Installed capacity;    Normal operations;    Offshore environments;    Parametrizations;    Rotational speed;    Wind speed estimations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/524/1/012156/pdf
DOI  :  10.1088/1742-6596/524/1/012156

来源: IOP

【 摘 要 】

With increasing installed capacity, wind farms are requested to downregulate more frequently, especially in the offshore environment. Determination and verification of possible (or available) power of downregulated offshore wind farms are the aims of the PossPOW project (see PossPOW.dtu.dk). Two main challenges encountered in the project so far are the estimation of wind speed and the recreation of the flow inside the downregulated wind farm as if it is operating ideally. The rotor effective wind speed was estimated using power, pitch angle and rotational speed as inputs combined with a generic Cpmodel. The results have been compared with Horns Rev-I dataset and NREL 5MW simulations under both downregulation and normal operation states. For the real-time flow recreation, the GCLarsen single wake model was re-calibrated using a 1-s dataset from Horns Rev and tested for the downregulated period. The re-calibrated model has to be further parametrized to include dynamic effects such as wind direction variability and meandering also considering different averaging time scales before implemented in full scale wind farms.