Wind farm active power control method

A wind farm, active power technology, applied in wind power generation, electrical components, circuit devices, etc., can solve problems such as slow response speed, increased unit failure rate, and impact on the stability and safety of wind turbines

Inactive Publication Date: 2016-08-31
STATE GRID CORP OF CHINA +4
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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 op

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Embodiment Construction

[0050] The present invention is described in detail below in conjunction with accompanying drawing:

[0051] Such as figure 1 Shown is a flow chart of the method for controlling the active power of a wind farm in the present invention. This embodiment is to propose a wind farm active power control method that can timely and accurately adjust the active power of the grid-connected point of the wind farm, fully consider the actual working conditions of each wind turbine, and improve the stability and safety of the wind turbine operation , the method steps are as follows:

[0052] (1) Measure the actual value of active power P of the grid-connected point of the wind farm mea , to calculate the active power target value P of the grid-connected point target and the actual value of active power P mea The difference is recorded as the active power deviation ΔP=P target -P mea ;

[0053] (2) Set the dead zone threshold δ of the active power deviation, if the absolute value of t...

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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...

Claims

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Application Information

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IPC IPC(8): H02J3/48
CPCH02J3/386H02J3/48Y02E10/76
Inventor 杨晓强胡从川阙波钱海盛国栋
Owner STATE GRID CORP OF CHINA
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