Adequacy evaluation of offshore wind farm considering wake effect

Abstract

In the process of modeling offshore wind farms, it is important to establish an accurate model of wind speed as it is relevant to the power output of the wind turbine generator (WTG). In an offshore wind farm, due to the units are intensively located, the influence of wake effect cannot be neglected. The wake effect is related to many factors, such as wind speed, wind direction and the platoon of WTGs. In this paper, a wind power output model considering wake effects is proposed for power systems reliability evaluation. By analyzing the influence of partial occlusion and the wake effect on the complex wind turbines, a model of partial shield wake effect considering complex terrain is established. By using MATLAB, the input wind speed is calculated under different wind speed, wind direction and fan arrangement, and the fast modeling of wind farm under the change of wind speed and direction is simulated. The model can more accurately describe the change when the wind speed and direction of wind farms output power. The correctness of the method is verified by simulation. The method is transplantable and can be used to calculate the input wind speed model of wind farms in various scales. Theoretically, by setting up multiple offshore wind locations, the intermittency and randomness of the integrated output can be reduced. The power outputs from multiple offshore wind locations are also investigated in this study.