Yaw system and yaw method based on frequency converter effective damping

Abstract

A yaw control system and yaw method based on the effective damping of frequency converters belong to the technical field of wind power generation. The yaw system includes a main control controller, at least one set of yaw motors, a frequency converter connected to the yaw motors, a braking system, a position encoder, and an uncable protector, and the set of yaw motors is four , 3 of which are yaw driving motors, and 1 is a yaw damping motor during the start and stop process. Each frequency converter drives each yaw motor independently. On the yaw ring gear, each frequency converter, uncable protector, and position encoder are respectively connected to the main controller. The invention adopts the frequency converter to drive the yaw motor, which can realize the soft start and soft stop of the yaw system, reduce the impact of the starting current on the motor, make the fan run smoothly, prolong the life of the motor, and reduce the damage caused by the vibration of the fan; The yaw system can also realize the speed regulation operation of the yaw.

Description

technical field [0001] The invention belongs to the technical field of wind power generation, and in particular relates to a yaw system and a yaw method based on the effective damping of a frequency converter. Background technique [0002] The yaw system is a unique servo system of wind turbines, also known as the wind-facing device. Its performance directly affects the overall performance of the unit, as well as the utilization efficiency of wind energy and power generation efficiency. As the capacity of the wind turbine generator set increases, the equipment and weight of the cabin in the wind turbine generator set also increase. When the wind turbine yaws against the wind, the unit will produce gyro torque fluctuations, which will cause vibrations of the tower, blades, etc., thus posing a threat to the safety of the entire wind power generation system. [0003] Problems existing in the current existing technology: 1. From the perspective of structural performance, the po...

AI Technical Summary

Problems solved by technology

When the wind turbine yaws against the wind, the unit will produce gyro torque fluctuations, which will cause vibrations of the tower, blades, etc., thus posing a threat to the safety of the entire wind power generation system.

[0003] Problems existing in the current existing technology: 1. From the perspective of structural performance, the power frequency yaw motor is adopted. At the beginning and end of the yaw, the yaw hydraulic brake mechanism will act, which will also cause the cabin to shake greatly, and will also have an impact on the overall performance

However, if the conventional PID servo controller is applied to the yaw system, the yaw system needs to be started frequently, so that the yaw actuator will be easily damaged due to frequent actions.

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