Torque smooth control method for forward and reverse switching of pitch motor in wind power generation system

Abstract

The invention discloses a smooth torque control method for switchover of forward rotation and reverse rotation of a variable pitch motor of a wind power generation system. The method comprises variable pitch driver output torque smooth control in the changing process from forward adjustment of a paddle to reverse adjustment of the paddle and variable pitch driver output torque smooth control in the changing process from reverse adjustment of the paddle to forward adjustment of the paddle. Through angle changes of the paddle at different times and changes of variable pitch speeds at different times, stepping smooth adjustment is conducted on final target torque output by a variable pitch driver, the output final target torque meets the paddle angle adjusting requirement at current time, meanwhile, acute rigidity collisions generated through large and small meshing gears in the process from forward adjustment of the paddle to reverse adjustment of the paddle and in the process from reverse adjustment of the paddle to forward adjustment of the paddle due to existence of gear gaps are effectively reduced or eliminated, the service life of blade bearing gears, variable pitch motor shaft gears and speed reduction box gears in the wind power generation system is prolonged, the running performance of the blade bearing gears, the variable pitch motor shaft gears and the speed reduction box gears in the wind power generation system is improved, and economic benefits of enterprises are improved.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a torque smoothing control method for forward and reverse switching of a pitch motor in a wind power generation system. Background technique [0002] The blade angle of the wind turbine is frequently adjusted forward and reverse during actual operation. Due to the incomplete meshing between the blade bearing gear and the gear box gear, and between the shaft gear of the pitch motor and the gear box gear, there is a certain During the switching process of the forward and reverse rotation of the motor, the large and small gears will have a relatively strong rigid collision. Long-term collision will reduce the life of the gear or even damage it. [0003] The output torque of the existing pitch drive during the forward and reverse process of the pitch drive is determined by the set motor acceleration and deceleration time and the load. The shorter the acceleration and deceleration...

AI Technical Summary

Problems solved by technology

[0002] The blade angle of the wind turbine is frequently adjusted forward and reverse during actual operation. Due to the incomplete meshing between the blade bearing gear and the gear box gear, and between the shaft gear of the pitch motor and the gear box gear, there is a certain During the switching process of the forward and reverse rotation of the motor, the large and small gears will have a relatively strong rigid collision. Long-term collision will reduce the life of the gear or even damage it.

[0003] The output torque of the existing pitch drive during the forward and reverse process of the pitch drive is determined by the set motor acceleration and deceleration time and the load. The shorter the acceleration and deceleration time, the greater the output torque; the greater the load, the greater the output torque. The greater the moment, the greater the moment, the more significant the impact damage caused by the collision

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