Wind farm active power control method

Abstract

The invention discloses a wind farm active power control method comprising the following steps: measuring the active power actual value of a wind farm grid connection point, calculating the difference between the active power target value and the active power actual value of the grid connection point, recording the difference as an active power deviation, and calculating the maximum active power of each wind turbine according to the real-time wind measurement data of the wind farm grid connection point; calculating the active power addition margin coefficient and the active power reduction margin coefficient of each wind turbine unit according to the current actual active power and the maximum active power of each wind turbine unit, and arranging the active power addition margin coefficients and the active power reduction margin coefficients in order of size to generate an active power addition margin queue and an active power reduction margin queue; and determining a corresponding power regulation strategy. According to the invention, an active power regulation instruction of scheduling can be automatically assigned to a single wind turbine unit for execution, so that the labor intensity of wind farm operators is reduced greatly, and the speed of response to scheduling power target and the precision of power regulation are improved.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a method for controlling active power of a wind power plant. Background technique [0002] In recent years, wind power has been vigorously developed as a renewable clean energy power generation. As the proportion of wind turbine installed capacity in the total installed capacity continues to increase, large fluctuations in the power sent to the grid by wind turbines will have an increasingly negative impact on the stable operation of the grid. Therefore, the realization of wind farm active power It is an urgent problem to be solved. [0003] At present, most active power adjustment methods used in wind farms are manual adjustment. Specifically, firstly, the power grid dispatching department notifies the wind farm to adjust the active power by telephone, and then the duty personnel of the wind farm compares the dispatched active power target value with the actual a...

AI Technical Summary

Problems solved by technology

[0004] 1) Since the above-mentioned wind farm active power adjustment method is completed manually by the operator, that is, after the operator receives the dispatch adjustment request, the comparison between the target value of the dispatch and the actual value of the wind farm at this time is obtained by calculation. value, and manually control the start / stop and power up / down of the wind turbines in the wind farm according to the comparison difference, so there are problems such as large errors and slow response speeds, which in turn cause the loss of power generation of the wind farm

[0005] 2) The above-mentioned wind farm active power adjustment method does not call and control the wind turbines according to the specific working conditions of each wind turbine in the wind farm. Instead, the operators start / stop or raise / lower the wind turbines at random. power operation

Therefore, the above-mentioned wind farm active power regulation method is not only highly dependent on the reliability of the corresponding wind turbines, but also ignores the specific working conditions of the wind turbines due to the random operation of the corresponding wind turbines (such as the cumulative running time of the wind turbines, the cumulative shutdown time, etc.), As a result, some units have been running for a long time, while others have been shut down for a long time, resulting in an increase in the failure rate of the units

Moreover, the frequent start / stop of the wind turbine itself will affect the stability and safety of the wind turbine, and it will also affect the service life of the wind turbine

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