Fault detection device and method for yaw system of wind turbine generator

Abstract

The invention discloses a wind turbine generator yaw system fault detection device and method. The device comprises a signal acquisition module and a signal processing and fault diagnosis module. The signal acquisition module is used for acquiring cabin yaw state information and environment state information of the wind turbine generator; the signal processing and fault diagnosis module comprises a yaw frequency converter and a master control PLC unit which can perform data interaction; the main control PLC unit is in data connection with the signal acquisition module and is used for receiving the environment state information and the cabin yaw state information so as to perform non-motor type fault detection; and the yaw frequency converter performs motor fault detection. Through the detection device, acquisition of three-phase current, motor temperature and brake feedback signals of the yaw motor can be realized, acquisition of information such as yaw cable twisting, hydraulic pressure, wind speed and direction, yaw vibration and the like can be realized, fault diagnosis of a yaw system can be realized through information processing, and accurate positioning of motor faults can be realized.

Description

technical field [0001] The invention relates to the technical field of wind power equipment detection, in particular to a fault detection device and method for a yaw system of a wind turbine. Background technique [0002] As an important part of the wind turbine, the yaw system is used to receive the command of the main control system, control the nacelle to rotate to the set position, conduct the wind by the unit, and realize the wind rotor to track the changing and stable wind direction. At the same time, when the cable drawn from the inside of the nacelle is entangled due to the yaw effect of the wind turbine, the automatic unwinding function can be realized. [0003] The yaw system mainly includes hydraulic system, yaw motor, yaw drive, yaw reduction box, yaw bearing and other components. Due to the large number of components in the yaw system, when the yaw system fails to be detected or located accurately, the unit will be shut down for a long time to reduce the power ...

AI Technical Summary

Problems solved by technology

The monitoring data collected by the yaw system is input into the yaw fault diagnosis model in real time, and the yaw fault diagnosis model is used to determine whether the yaw system is faulty, and the specific fault diagnosis results when a fault occurs; but the above method is a hard start control of the yaw motor Judgment of yaw system faults under certain circumstances is not applicable to the system fault judgment of the yaw inverter scheme, especially the yaw motor one-drag multi-scheme

At the same time, it is impossible to accurately locate which motor in the yaw system is faulty.

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