Power smoothing method based on kinetic energy storage for wind farm wind turbine cooperative integrated control

Abstract

The invention discloses a power smoothing method based on kinetic energy storage for wind farm wind turbine cooperative integrated control, which comprises the following steps: S1, frequency dividingthe historical output power fluctuation of the wind farm into a high frequency power fluctuation component and a low frequency power fluctuation component; S2, dividing the high frequency power fluctuation component into a high frequency power fluctuation component and a low frequency power fluctuation component; 2, accord to that historical wind condition and the historical output power fluctuation of the wind farm, classify the wind fans of the wind farm into a master fan and a slave fan, and determining the numb of the master fan and the slave fan; 3, store that high-frequency power fluctuation component in the output power fluctuation of the slave fan on the rotor in the form of kinetic energy, so that the slave fan can smooth the high-frequency power fluctuation component in the output power of the slave fan; S4: Given the proper power of the main fan, the fluctuation component of the medium and low frequency power of the total output power of the wind farm can be smoothed. The invention makes the power smoothing more pertinent and effective by dividing the output power fluctuation.

Description

technical field [0001] The invention relates to the field of wind power, in particular to a power smoothing method based on kinetic energy storage for coordinated comprehensive control of wind turbines in wind farms. Background technique [0002] Although wind power generation has been vigorously developed in recent years, there are many factors that restrict the large-scale integration of wind power into the grid. The most important factor is that wind energy has the characteristics of randomness, intermittent and unpredictability, and the output power of wind turbines will fluctuate with the change of wind speed. If the fluctuating power is directly incorporated into the grid, it will have a great impact on the stability of the grid. With the gradual increase of wind power capacity connected to the grid, this impact is getting bigger and bigger. my country has also implemented the new wind power grid connection standard since 2012, which has specific requirements for the ...

AI Technical Summary

Problems solved by technology

However, if the conventional direct power control only considers the smoothness of the output power of each wind turbine, it will not be able to take advantage of the differences between the wind turbines in the wind farm, and it will increase the difficulty of controlling each wind turbine and may reduce the wind power. Wind energy utilization rate of the machine

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