Intelligent control method that wind power plant participates in primary frequency modulation and control system thereof

Abstract

The present invention discloses an intelligent control method that a wind power plant participates in the primary frequency modulation and a control system thereof. The intelligent control method comprises the following steps of real-timely acquiring the power grid frequency of the high-voltage end of a wind power plant main transformer, determining whether the power grid frequency exceeds a set frequency dead zone, if the power grid frequency exceeds the set frequency dead zone, representing that the wind power plant needs to participate in the primary frequency modulation; calculating an active power superpose amount delta P needing to be adjusted; before the primary frequency modulation, calculating a draught fan target value Ptotal, and classifying the lists of the draught fans capableof participating in the modulation; according to the superpose amount delta P, making an adjusting cycle number needed by a frequency modulation task, then issuing the instructions of a first adjusting cycle to the wind turbine generator sets; monitoring the execution situations of the wind turbine generator sets, feeding back to an energy management platform, arranging a wind turbine generator optimal execution list to issue the instructions of a second adjusting cycle, and so on, finishing a primary frequency modulation task. According to the present invention, the instructions are issued in twice, the instructions at the first time are the tentative instructions, and by synthesizing the feedback information, the second time instructions are issued, so that the adjustment precision 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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