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Pitch control method and device of wind driven generator set

A technology for wind turbines and units, which is applied in the control of wind turbines, wind turbines, engine control, etc., can solve the problem that the input signal of the control system is not suitable, the measurement accuracy of the wind speed signal is reduced, and the simulation model of the relationship between the wind speed and the pitch angle cannot be solved. Corresponding problems such as avoiding over-speed shutdown, improving availability and safety

Active Publication Date: 2016-06-08
BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the above method has the following disadvantages: firstly, the existing aircrew usually installs the anemometer on the nacelle cover behind the impeller. The relationship between the pitch angle and the simulation model cannot correspond; secondly, after a long-term use of the commonly used mechanical anemometer, the measurement accuracy of the wind speed signal is reduced, and it is not suitable as an input signal for the control system
Therefore, through the above method, it is impossible to avoid the overspeed fault in the case of strong wind or gust, which will cause the fan to stop, thereby affecting the power generation efficiency and the safety of the unit

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  • Pitch control method and device of wind driven generator set

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Embodiment 1

[0023] figure 1 It is a schematic flow chart of the pitch control method of the wind power generating set in Embodiment 1 of the present invention, as figure 1 As shown, the pitch control method of the wind turbine includes:

[0024] Step 110: Calculate the average pitch angle of the wind power generating set within a preset time length, and calculate the dynamic minimum pitch angle according to the average pitch angle.

[0025] According to an exemplary embodiment of the present invention, the process of calculating the dynamic minimum pitch angle according to the average pitch angle in step 110 may include: obtaining the dynamic minimum pitch angle by performing linear interpolation on the average pitch angle, or According to the average pitch angle, the corresponding relationship table between preset different pitch angle ranges and minimum pitch positions is searched to obtain the dynamic minimum pitch angle.

[0026] In a specific implementation manner, the calculation ...

Embodiment 2

[0048] Figure 12 It is a schematic structural diagram of a pitch control device for a wind power generating set according to Embodiment 2 of the present invention. It can be used to execute the steps of the pitch control method of the wind power generating set in Embodiment 1 of the present invention.

[0049] refer to Figure 12 , the pitch control device of the wind power generating set includes a dynamic minimum pitch angle calculation module 1210 , a parameter acquisition and gain calculation module 1220 and a pitch control module 1230 .

[0050] The dynamic minimum pitch angle calculation module 1210 is used to calculate the average pitch angle of the wind turbine within the preset time length, and calculate the dynamic minimum pitch angle according to the average pitch angle;

[0051] The parameter acquisition and gain calculation module 1220 is used to acquire the unit operating parameters of the wind power generating set in the full power state, and calculate the pi...

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Abstract

The invention provides a pitch control method and a device of a wind driven generator set. The pitch control method of the wind driven generator set comprises the steps of: calculating an average pitch angle of the wind driven generator set in a preset time length, and calculating a minimum dynamic pitch angle according to the average pitch angle; obtaining set operation parameters of the wind driven generator set under a fully loaded running state, and calculating a pitch parameter gain through performing liner interpolation for the set operation parameters; and performing the pitch control according to the minimum dynamic pitch angle and / or output of a pitch controller adjusted by the parameter gain. The pitch control method and the device of the wind driven generator set prevent overspeed stop of the wind driven generator set under gale or gust to improve the utilization rate and the safety of the wind power generator set.

Description

technical field [0001] The invention relates to the technical field of wind power, in particular to a pitch control method and device for a wind power generating set. Background technique [0002] In recent years, wind power has become one of the main ways to obtain green energy. my country's wind power generation units (hereinafter referred to as units) are developing towards megawatt-scale large-scale, and the pitch control directly affects the safe and stable production of megawatt-level wind power generation units. [0003] At present, the existing pitch control method is based on the modeling and simulation of wind turbines to obtain the corresponding table of different wind speeds and pitch angle ranges, and then calculate the average wind speed and apply the interpolation algorithm to calculate the pitch range under the current wind speed , and then correct the pitch range, and use the nonlinear factor to correct the pitch speed to realize the output control. [000...

Claims

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Application Information

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IPC IPC(8): F03D7/00
CPCF03D7/0224F05B2270/328Y02E10/72
Inventor 田萌赵树椿韩胜男
Owner BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP