CN-121993350-A - Wind power variable pitch driving system

CN121993350ACN 121993350 ACN121993350 ACN 121993350ACN-121993350-A

Abstract

The invention discloses a wind power pitch-variable driving system which comprises a driving module, a transmission module, a control module, a detection module and a pitch-variable bearing. The permanent magnet synchronous motor is matched with a vector control driver, torque-magnetic field decoupling control is achieved, high torque density and excellent dynamic response are achieved, a rapid pitch command can be accurately executed to stabilize power fluctuation, a planetary gear box is used for reducing speed and increasing torque, the structure is compact, transmission is stable, a built-in lubrication system guarantees long-term reliable operation of gears, and maintenance requirements are reduced. The control module is internally provided with a variable pitch strategy algorithm, the variable pitch rate can be dynamically optimized according to real-time signals of the unit, safety and power generation efficiency are considered, and the fault diagnosis module realizes predictive maintenance. Meanwhile, the system is provided with a redundant driving module, an emergency braking device and an energy storage unit, so that the redundant system and the locking blade can be rapidly switched and the safe blade collection can be ensured under the main driving failure, power failure or emergency working condition, and the failure crossing capability and the safety can be greatly improved.

Inventors

WANG JIANYONG
CUI YANQING
CUI FUGUO
Xue Junxiang
DING XIAONAN

Assignees

青岛可锐信智能装备有限公司

Dates

Publication Date: 20260508
Application Date: 20260407

Claims (10)

1. The wind power pitch-variable driving system comprises a driving module, a transmission module, a control module, a detection module and a pitch-variable bearing, and is characterized in that the driving module is in power connection with the input end of the transmission module, the output end of the transmission module is in transmission fit with the pitch-variable bearing, the detection module acquires a pitch-variable running state signal and transmits the pitch-variable running state signal to the control module, and the control module regulates and controls the driving module to run according to the signal.
2. The wind power pitch drive system of claim 1, wherein the drive module is a permanent magnet synchronous motor, the permanent magnet synchronous motor is configured with a vector control driver, and the vector control driver is in bidirectional communication with the control module.
3. A wind power pitch drive system according to claim 1, wherein the transmission module comprises a planetary gear box and a coupler, the input end of the planetary gear box is connected with the output shaft of the drive module through the coupler, and the output end of the planetary gear box is in meshed transmission with the pitch bearing.
4. The wind power pitch drive system according to claim 1, wherein a pitch strategy algorithm and a fault diagnosis module are arranged in the control module, the pitch strategy algorithm can dynamically optimize the pitch rate according to unit operation signals, the fault diagnosis module monitors the system operation state in real time, and when abnormality is detected, an alarm is triggered and the system is switched to a standby control mode.
5. The wind power pitch drive system according to claim 1, wherein the detection module comprises an angle sensor, a torque sensor and a temperature sensor, the angle sensor is arranged at the end part of the pitch bearing, the measurement precision is not lower than +/-0.1 degrees, the torque sensor is arranged on a power transmission path of the transmission module, and the temperature sensor is arranged on the drive module and the transmission module, monitors working temperatures of corresponding components respectively and feeds back the working temperatures to the control module.
6. The wind power pitch drive system of claim 1, further comprising a redundant drive module, wherein the redundant drive module is configured in parallel with the main drive module, and the control module can automatically switch to the redundant drive module according to the operation state of the main drive module, and the response time of redundancy switching is less than or equal to 50ms.
7. The wind power pitch drive system of claim 1, wherein the intelligent heat dissipation device is arranged outside the drive module and comprises a heat dissipation structure and a speed regulation heat dissipation part, and the control module regulates and controls the speed regulation heat dissipation part to operate according to a temperature sensor signal so as to maintain the working temperature of the drive module within a range of-40 ℃ to 85 ℃.
8. The wind power pitch drive system of claim 1, further comprising a brake device, wherein the brake device is in linkage fit with the pitch bearing, and the brake device automatically locks the pitch bearing when the system is powered off or an emergency fault is detected.
9. The wind power pitch drive system of claim 1, wherein the control module is connected with an energy storage unit, the energy storage unit is an energy storage capacitor bank, and when power supply of the unit is interrupted, the energy storage unit provides emergency power supply for the control module and the drive module.
10. The wind power pitch drive system of claim 1, wherein the planetary gear box of the transmission module is internally provided with a lubrication system, and the lubrication system comprises an oil delivery component and an oil path structure and can be used for delivering lubrication media to the gear engagement surface at regular time.

Description

Wind power variable pitch driving system Technical Field The invention relates to the technical field of wind power generation, in particular to a wind power variable pitch driving system. Background With the transformation of global energy structures to clean energy, wind power generation is developing towards a single machine with larger capacity, higher hub height and longer blades as a renewable energy form with mature technology and wide application. The pitch system is one of core control units of the wind turbine, and has the main functions of realizing maximum power tracking when the wind speed is lower than the rated wind speed by adjusting the pitch angle of blades, limiting captured wind energy when the wind speed is higher than the rated wind speed, and protecting the safe and stable operation of the wind turbine. The traditional wind power variable pitch driving system is driven by adopting an asynchronous motor and a common frequency converter or a servo system, and has the problems of low response speed, insufficient control precision, low efficiency and the like. The transmission mechanism is easy to wear under frequent start and stop and heavy load impact, and has short service life. In addition, the traditional control system has limited intelligent level, is difficult to dynamically optimize the pitching action according to complex actual working conditions, and lacks comprehensive and accurate state monitoring and fault self-healing capability. Reliability and safety of the system face challenges in the face of grid drops, extreme weather, or component sudden failures. Therefore, there is a need for an advanced wind power pitch drive system integrating high precision drive, intelligent control, real-time monitoring and multiple safety redundancies. Disclosure of Invention The invention aims to provide a wind power variable pitch driving system for solving the problems in the background technology. The wind power pitch-variable driving system is characterized in that the driving module is in power connection with the input end of the transmission module, the output end of the transmission module is in transmission fit with the pitch-variable bearing, the detection module acquires a pitch-variable running state signal and transmits the signal to the control module, and the control module regulates and controls the driving module to run according to the signal. Preferably, the driving module is a permanent magnet synchronous motor, and the permanent magnet synchronous motor is provided with a vector control driver which is in bidirectional communication with the control module. Preferably, the transmission module comprises a planetary gear box and a coupler, wherein the input end of the planetary gear box is connected with the output shaft of the driving module through the coupler, and the output end of the planetary gear box is meshed with the variable-pitch bearing for transmission. As an optimal choice, the control module is internally provided with a pitch strategy algorithm and a fault diagnosis module, the pitch strategy algorithm can dynamically optimize the pitch rate according to the unit operation signal, the fault diagnosis module monitors the system operation state in real time, and when abnormality is detected, the fault diagnosis module triggers an alarm and switches to a standby control mode. The invention is characterized in that the detection module comprises an angle sensor, a torque sensor and a temperature sensor, wherein the angle sensor is arranged at the end part of the variable-pitch bearing, the measurement precision is not lower than +/-0.1 degrees, the torque sensor is arranged on a power transmission path of the transmission module, and the temperature sensor is arranged on the driving module and the transmission module, monitors the working temperature of corresponding parts and feeds back the working temperature to the control module. As a preferable mode, the invention further comprises a redundant driving module, wherein the redundant driving module is configured in parallel with the main driving module, and the control module can be automatically switched to the redundant driving module according to the running state of the main driving module, and the response time of redundant switching is less than or equal to 50ms. As one preferable mode of the invention, an intelligent heat dissipation device is arranged outside the driving module, the intelligent heat dissipation device comprises a heat dissipation structure and a speed regulation heat dissipation part, and the control module regulates and controls the speed regulation heat dissipation part to operate according to a temperature sensor signal, so that the working temperature of the driving module is maintained in a range of-40 ℃ to 85 ℃. The invention also comprises a braking device which is in linkage fit with the variable-pitch bearing, and the braking device automatically locks the variable-pitch bea