An intelligent control method and control system for a wind farm participating in primary frequency regulation

Abstract

The invention discloses an intelligent control method and a control system for a wind farm to participate in primary frequency modulation, including the following steps: collecting the frequency of the power grid at the high-voltage end of the main transformer of the wind farm in real time and judging whether it exceeds the set frequency dead zone, and if the frequency exceeds the frequency dead zone Then the wind farm needs to participate in a frequency regulation; calculate the active power superposition amount ΔP that needs to be adjusted; before a frequency regulation, calculate the target value of the wind turbine Ptotal and classify the list of wind turbines that can participate in this regulation; according to ΔP, formulate the frequency regulation task. The number of adjustment cycles, and then send the command of the first adjustment cycle to each wind turbine; monitor the execution of the wind turbine, feed back to the energy management platform, arrange the optimal execution list of the wind turbine, and issue the second adjustment accordingly Periodic instructions, and so on to complete a frequency modulation task. In the present invention, the general instruction is issued twice, the first is a tentative instruction, and the second instruction is issued through comprehensive feedback information, so that the adjustment accuracy is higher.

Description

technical field [0001] The invention relates to the field of auxiliary equipment for multiple wind power generators in a wind farm, in particular to an intelligent control method and a control system for wind farms participating in primary frequency modulation. Background technique [0002] With the continuous increase of the proportion of new energy in the power system, the structure of the power grid is becoming more and more complex, and the power imbalance problem of the power system caused by the fluctuation of new energy power generation is gradually emerging. Therefore, the participation of new energy in the primary frequency regulation of the power system is of great significance to the stable operation of the entire system at this stage and the improvement of the penetration rate of new energy. The grid company preliminarily proposes that the wind farm will participate in a frequency regulation task. There are often dozens or even hundreds of power generation equipm...

AI Technical Summary

Problems solved by technology

[0005] The main defect of the existing technology is: the capacity of the wind power generator is small, and in the case of the unit pursuing the optimal power, the power increase is maintained simply by releasing the moment of inertia, and the duration is short, which is not conducive to the wind farm’s impact on the grid frequency. Support; there is no monitoring mechanism for the execution of the unit during a frequency adjustment process, and it is necessary to issue instructions to the unit in a differentiated manner; there is no effective method for the synchronization problem encountered in the frequency adjustment of the wind turbine group

If the synchronization problem of the wind power generator group cannot be solved, the primary frequency modulation effect of the wind farm will be poor, and the real-time active power of the wind farm will fluctuate, and the control effect will be unsatisfactory; the lack of a control strategy for the connection between the primary frequency modulation and the secondary frequency modulation of the wind farm

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