3.2.2. Wind Turbine

The wind turbine designed and assembled by Taiyuan University of Technology was employed in this study. The key specifications of the wind turbine are presented in Table 4.


**Table 4.** Key specifications of the wind turbine.

Ten wind turbines can be used to form a 100 KW wind farm. Different types of wind turbines output different power based on their power curve characteristics. Through a comprehensive literature review, a model used to describe the performance is proposed as follows [19].

$$\begin{cases} P\_{wind} = P\_1 + P\_2 + P\_3 \\\ P\_1 = \sum P\_R t \left(\upsilon / \upsilon\_R\right)^3 \left(\upsilon\_c \le \upsilon \le \upsilon\_R\right) \\\ P\_2 = P\_R \sum t \left(\upsilon\_R \le \upsilon \le \upsilon\_F\right) \\\ P\_3 = 0 \left(\upsilon < \upsilon\_c \text{ and } \upsilon > \upsilon\_R\right) \end{cases} \tag{6}$$

where *Pwind* is the output of wind power (Wh/day), which consists of *P*1, *P*2 and *P*3; *Vc* is the cut-in wind speed (2.5 m/s); *VR* is the rated wind speed (10 m/s); *VF* is the cut-off wind speed (45 m/s); *V* is the wind speed; *PR* is the rated electrical power (10 KW), which is average energy at the wind speed of 10 m/s for one minute; *t* is the time (hours).
