Abstract
The entire wind farm is regarded as a large-capacity wind turbine for modeling double-fed wind farm. The influence of flow field characteristics in the wind farm has been ignored. In order to reflect the influence in double-fed wind farm equivalent modeling, an equivalent modeling method of double-fed wind farm based on the flow field characteristics has been proposed. A calculation model of the double-fed wind farm flow field has been built considering the influence of terrain and wake. The wind speed was calculated at each wind turbine installed point based on the flow field calculation model, and using the wind speed as the input wind speed for each wind turbine, the dynamic characteristics of the wind farm production process has been studied. The simulation analysis has been done for the proposed modeling method, and the simulation results show that the proposed modeling method can reflects the dynamic characteristics of the wind farm production process more accurately.
Highlights
Because a series of serious environmental events, such as haze invasion and PM2.5 index explosion, etc, wind energy as a renewable and non-polluting energy has been paid increasing attention and developed rapidly [1,2]
Part of wind energy can be transformed into mechanical energy by wind turbine to drive the generator work, so the wind speed will be reduced when the wind passes by wind turbine
An equivalent modeling method for double-fed wind farm based on flow field characteristics has been proposed in this paper
Summary
Because a series of serious environmental events, such as haze invasion and PM2.5 index explosion, etc, wind energy as a renewable and non-polluting energy has been paid increasing attention and developed rapidly [1,2]. The equivalent modeling method for wind farm is that the wind turbines in the wind farm are equal as weighted single machine model, and ignoring the flow field information of the wind farm This modeling method has a deviation when researching the production process dynamic characteristics of the grid connected wind farm. When ignoring the actual location of wind turbines and the wake effects between each turbine, the entire wind farm can be equivalent to a single model, and this method couldn’t reflects the dynamic characteristics in wind farm production process[5]. A new equivalent modeling method has been proposed based on auto mutation particle swarm optimization algorithm for double-fed wind turbines [7] In this method, wind turbines are classified into different classification according to the wind turbine type, and its equivalent model is obtained by simplifying the control strategy. The simulation analysis has been done for the proposed modeling method
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