Method and device for controlling dual-motor variable-pitch system

Abstract

The invention relates to a method and device for controlling a dual-motor variable-pitch system. The method comprises the steps that firstly, the current position of a paddle and the target position of the paddle are acquired, and a motor target rotating speed is calculated according to the difference value of the current position and the target position of the paddle; motor target torque is obtained according to the motor target rotating speed; then the motor target torque is distributed to a master motor and a slave motor, and master motor target torque current and slave motor target torque current are obtained; the master motor is controlled through the master motor target torque current, and the slave motor is controlled through the slave motor target torque current. According to the method, the master motor and the slave motor are controlled separately, one part of the motor target torque is output by the master motor, the other part of the motor target torque is output by the slave motor, coordination control over the master motor and the slave motor is achieved, and it is guaranteed that the paddle can reach the target position.

Description

technical field [0001] The invention belongs to the technical field of wind turbines, and in particular relates to a control method and device for a dual-motor pitch control system. Background technique [0002] As an important part of the wind turbine, the pitch system is used to receive commands from the main control system, control the blades to rotate to a set angle, and then control the speed of the wind rotor to realize the control of the output power of the wind turbine. When it is used as the pneumatic brake of the fan in an emergency, the blades are controlled to retract quickly, and the fan is stopped safely through aerodynamic braking to achieve the purpose of protecting the safety of the unit. [0003] At present, most domestic wind turbines use a control system that drives a single motor. However, with the application of high-power units, the blades will inevitably be lengthened and the load will increase, resulting in excessive volume of motors, reducers, contr...

AI Technical Summary

Problems solved by technology

[0003] At present, most domestic wind turbines use a control system that drives a single motor. However, with the application of high-power units, the blades will inevitably be lengthened and the load will increase, resulting in excessive volume of motors, reducers, control cabinets, and capacitor cabinets.

Due to the limited volume of the hub, the installation is difficult due to the large size of the parts; at the same time, due to the large mass of the large parts, it is more difficult to repair and replace when damaged

Images