The calculation formula of abandoned wind power is as follows: Wind power abandoned = Theoretical grid-connected power of all wind farms during the power limit period - The actual grid-connected power of all wind farms during the power limit period.
Among them:
Theoretical grid power of the whole wind farm = ∑ Model wind turbine power generation ÷ (Model wind turbine capacity/wind farm operating capacity) - Wind farm internal transmission line loss -Plant power consumption
The actual power generation of the entire wind farm = the meter reading of the wind farm’s access grid interface. The power restriction period is determined by the power dispatching agency.
The number of wind farm prototypes should not exceed 10% of the total number of wind turbines in the site. The determination of wind farm prototypes is, in principle, designated by the power dispatching agency, and is evenly distributed according to the geographical location and terrain, taking into account micro-wind conditions, fully considering units of different types and capacities, and determined according to exhaustive methods, genetic algorithms, etc. The benchmark wind turbine combination strives to accurately reflect the overall actual power generation capacity of the wind farm.
When the monthly power generation of the wind farm is 20 million, there is a 4-kilometer long line. How to calculate the loss of the 4-kilometer long line. The line voltage level is 110kV
The theoretical power generation calculated by the 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 turbines are out of service or repaired, and then on the 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%.
1. Obtain 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