Wind power station active power control method

Abstract

The invention discloses a wind power station active power control method which includes the following steps. Firstly, a wind power station and a net value of active power of a network point are measured. Secondly, whether a difference between objective power and actual power is in a dead zone threshold value range of power deviation is judged. Thirdly, the maximum active power of all wind turbine generator units is calculated. Fourthly, an active margin addition queue and an active margin reduction queue are generated. Fifthly, an active margin addition sum and an active margin reduction sum of all the adjustable wind turbine generator units in operation are calculated. Sixthly, a starting queue and a halting queue are generated. Seventhly, a power regulating strategy is confirmed. Eighthly, a control order is emitted to the wind turbine generator units. Ninthly, returning to the first step is not performed until the wind turbine generator units perform the order. According to the wind power station active power control method, a called active power regulating order can be automatically distributed to a single wind turbine generator unit for actuation. Labor intensity of operation staff in the wind power station and loss of generated energy by the wind power station are greatly reduced. A responding speed of a called power object, economic benefits of the wind power station and precision in regulating power are improved.

Description

Technical field: [0001] The invention relates to a method for controlling active power of a wind farm, belonging to the technical field of wind power generation. 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 active pow...

AI Technical Summary

Problems solved by technology

[0004] 1) Since the above-mentioned wind farm active power adjustment method is manually completed by the operator, that is, after the operator receives the dispatch adjustment request, the difference between the dispatch target value and the wind farm’s actual output value at this time is obtained through 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 each wind turbine according to the specific working conditions of each wind turbine in the wind farm. Instead, the operator randomly starts / stops or raises / lowers the wind turbines. 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

Images