1, get the resistance R of the 4 km long line.
2. Calculate the power generated by the wind farm. P=20 million/(30*24)KW
3, calculate the current of the line. I=P/110KV
4, power loss. I*R
5, power loss. I*R*30*24*3600
The theoretical power generation calculated by wind power software needs to be corrected as follows according to the degree of influencing factors.
1) Air density reduction, the air density reduction coefficient calculation formula is: air density reduction coefficient = (1 - wind field air density / standard air density) * before rated wind speed Wind energy frequency.
If the on-site air density power curve is used to calculate power generation, there is no need to reduce it.
2) Reduction of wake losses. The wake losses of each wind turbine are generally considered through software calculations, so reductions will not be repeated.
3) The utilization rate of wind turbines depends on whether the wind power is generated by the unit or the power grid.
Arrange Tangfeng Songxiu in Xiaofengyue. Based on the current manufacturing level of wind turbines and the actual situation of the wind farm, the wind turbine utilization rate is estimated to be about 95%.