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CN-120889703-B - Variable pitch control method and device of wind generating set, medium and product

CN120889703BCN 120889703 BCN120889703 BCN 120889703BCN-120889703-B

Abstract

The application discloses a variable pitch control method, device, unit, medium and product of a wind generating set, and belongs to the technical field of wind power generation. According to the embodiment of the application, under the condition that the variable pitch motor of the wind generating set is in a band-type brake state, the first wind speed of wind at the first position and the distance between the first position and the second position are obtained, the first time length required for the wind to reach the second position from the first position is determined according to the first wind speed and the distance, timing is started from the time when the wind reaches the first position, and the variable pitch control is performed on the variable pitch motor of the wind generating set according to the first wind speed before the first time length is reached. That is, according to the embodiment of the application, the wind speed of the wind in front of the unit is obtained, and before the wind reaches the unit, the pitch motor is controlled to release the brake in advance, so that the pitch motor can directly pitch when the wind reaches the unit, the pitch delay time is shortened, and the pitch response speed is improved.

Inventors

  • XIANG JIANQIANG
  • CAO JINCHAO
  • CAO FENGZHI

Assignees

  • 三峡新能源山东昌邑发电有限公司

Dates

Publication Date
20260512
Application Date
20241205

Claims (11)

  1. 1. The pitch control method of the wind generating set is characterized by comprising the following steps of: Under the condition that a variable pitch motor of the wind generating set is in a band-type brake state, acquiring a first wind speed of a first position and a distance between the first position and a second position, wherein the first position is a position which is located in front of the wind generating set in the upwind direction, and the second position is a position where a generator of the wind generating set is located; determining a first time period required for wind to reach the second position from the first position according to the first wind speed and the distance; Under the condition that the first wind speed meets a preset condition and the timing time length reaches a second time length, performing first pitch control on the pitch motor, wherein the second time length is smaller than the first time length; and under the condition that the timing time length reaches the first time length, performing second pitch control on the pitch motor.
  2. 2. The pitch control method according to claim 1, wherein the performing the first pitch control on the pitch motor includes: and sending a first pitch instruction to the pitch motor so that the pitch motor executes a first pitch operation, wherein the first pitch instruction comprises a first pitch speed, and the first pitch speed is smaller than or equal to a preset speed threshold.
  3. 3. The pitch control method according to claim 1, wherein the performing the first pitch control on the pitch motor includes: And sending a brake release command to the variable-pitch motor under the condition that the rotating speed of the variable-pitch motor is a target rotating speed and the electromagnetic torque of the variable-pitch motor is a target torque, so that the variable-pitch motor executes brake release operation.
  4. 4. The pitch control method according to claim 1, wherein the performing the second pitch control on the pitch motor includes: Acquiring the rated rotation speed and the actual rotation speed of the generator; performing proportional-integral-derivative processing on the difference value between the rated rotation speed and the actual rotation speed to obtain a second variable pitch instruction, wherein the second variable pitch instruction comprises a second variable pitch speed, and the second variable pitch speed is larger than a preset speed threshold; and sending the second pitch instruction to the pitch motor so that the pitch motor executes a second pitch operation.
  5. 5. The pitch control method according to any one of claims 1-4, wherein prior to the first pitch control of the pitch motor, the method further comprises: obtaining the rated wind speed of the wind generating set; And under the condition that the first wind speed is larger than the rated wind speed, determining that the first wind speed meets a preset condition.
  6. 6. The pitch control method according to any one of claims 1-4, wherein prior to the first pitch control of the pitch motor, the method further comprises: Acquiring a second wind speed of the second position; and under the condition that the difference value between the first wind speed and the second wind speed is larger than a difference value threshold value, determining that the first wind speed meets a preset condition.
  7. 7. The pitch control method according to any one of claims 1-4, wherein prior to the first pitch control of the pitch motor, the method further comprises: Searching a wind speed and rotation speed relation according to the first wind speed to obtain a generator rotation speed corresponding to the first wind speed, wherein the wind speed and rotation speed relation comprises a relation between the wind speed and the generator rotation speed; and under the condition that the rotating speed of the generator is larger than the rated rotating speed of the generator, determining that the first wind speed meets a preset condition.
  8. 8. A pitch control device for a wind turbine generator system, comprising: The device comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring a first wind speed at a first position and a distance between the first position and a second position when a variable pitch motor of the wind generating set is in a band-type brake state, the first position is a position in front of the wind generating set in the upwind direction, and the second position is a position where a generator of the wind generating set is located; A determining module for determining a first time period required for wind to reach the second location from the first location based on the first wind speed and the distance; the control module is used for performing first pitch control on the pitch motor when the first wind speed meets a preset condition and the timing duration reaches a second duration, wherein the second duration is smaller than the first duration, and performing second pitch control on the pitch motor when the timing duration reaches the first duration.
  9. 9. A wind turbine generator set, comprising: A processor; A memory for storing computer program instructions; the laser radar is used for measuring a first wind speed at a first position and a distance between the first position and a second position, wherein the second position is the position where a generator of the wind generating set is located; The computer program instructions, when executed by the processor, implement the method of any of claims 1-7.
  10. 10. A computer readable storage medium having stored thereon computer program instructions, which when executed by a processor, implement the method of any of claims 1-7.
  11. 11. A computer program product comprising a computer program which, when executed by a processor, implements the method of any of claims 1-7.

Description

Variable pitch control method and device of wind generating set, medium and product Technical Field The application relates to the technical field of wind power generation, in particular to a variable pitch control method, a variable pitch control device, a variable pitch control unit, a variable pitch control medium and a variable pitch control product of a wind generating set. Background Along with the continuous increase of the capacity of the wind turbine generator, how to ensure the efficient and stable operation of the wind turbine generator and improve the wind energy utilization rate becomes an important content of the wind power generation technology research. However, the current knowledge of the operation condition and wind condition is insufficient, and the operation of the wind generating set can not meet the requirement of stable rotation speed. The reason is that the pitch control of the wind generating set at present is mainly proportional-integral-DERIVATIVE CONTROL (PID control for short), that is, the main control system calculates the pitch angle value by making the wind generating set operate at a constant rotation speed as a control target and transmits the pitch angle value to the pitch system, and the pitch system performs pitch according to the latest angle command. This method allows constant control of the rotational speed to a certain extent, but at the same time has the following disadvantages: (1) Because the wind speed is transient, the PID control is singly used, and the rotational speed stabilizing effect is limited to a certain extent; (2) The PID control is based on a target difference value, namely calculation and pitch change are started after the change of the rotating speed difference value is detected, hysteresis is provided, and the generating capacity of the unit is affected. At present, some schemes are adopted to increase the response speed of a pitch system by increasing the Kp value of a PID controller, but the phenomenon of pitch oscillation and overshoot is easily caused by the overlarge Kp value. In addition, the PID controller has certain hysteresis, because the control principle is to calculate according to the difference between the target rotating speed and the actual rotating speed. Therefore, the problem of response speed of the wind generating set during pitch variation cannot be completely solved by simply adjusting parameters of the PID controller. Disclosure of Invention The embodiment of the application provides a variable pitch control method, a variable pitch control device, a variable pitch control unit, a variable pitch control medium and a variable pitch control product for a wind generating set, which can effectively solve the problem of low response speed of the wind generating set during variable pitch. In a first aspect, an embodiment of the present application provides a pitch control method of a wind turbine generator system, including: Under the condition that a variable pitch motor of a wind generating set is in a band-type brake state, acquiring a first wind speed of a first position and a distance between the first position and a second position, wherein the first position is a position which is positioned in front of the wind generating set in the upwind direction, and the second position is a position where a generator of the wind generating set is positioned; determining a first time period required for the wind to reach the second position from the first position according to the first wind speed and the distance; And starting timing from the moment that the wind reaches the first position, and performing pitch control on a pitch motor of the wind generating set according to the first wind speed before the first time is reached. In a second aspect, an embodiment of the present application provides a pitch control device of a wind turbine generator system, including: The device comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring a first wind speed at a first position and a distance between the first position and a second position when a variable pitch motor of a wind generating set is in a band-type brake state, the first position is a position which is located in front of the wind generating set in the upwind direction, and the second position is a position where a generator of the wind generating set is located; A determining module for determining a first time period required for the wind to reach the second position from the first position based on the first wind speed and the distance; and the control module is used for timing from the arrival of wind at the first position, and performing pitch control on the pitch motor of the wind generating set according to the first wind speed before the arrival of the first time. In a third aspect, an embodiment of the present application provides a wind turbine generator set, including: A processor; A memory for st