Device and method for simulating dynamic load of permanent magnet direct drive variable pitch system of wind generation set

Abstract

The invention discloses a device and method for simulating the dynamic load of a permanent magnet direct drive variable pitch system of a wind generation set. The device for simulating the dynamic load of the permanent magnet direct drive variable pitch system of the wind generation set comprises a torque / speed sensor, a permanent magnet motor and a magnetic powder dynamometer, wherein a torsion shaft of the torque / speed sensor is separately connected with the permanent magnet motor and the magnetic powder dynamometer which are located on the left and right sides of the torque / speed sensor; the permanent magnet motor and the torque / speed sensor are separately connected with an upper computer through a frequency converter and an acquisition card; the magnetic powder dynamometer is connectedwith a dynamometer controller through the torque / speed sensor; and the dynamometer controller is connected with the upper computer and connected with the magnetic powder dynamometer through a currentregulator. The method for simulating the dynamic load of the permanent magnet direct drive variable pitch system of the wind generation set comprises the following steps that the load moment of the permanent magnet direct drive variable pitch system is calculated when blades are opened or closed; the load moment similarity coefficient is calculated according to the similarity theory; and the loadmoment output by the magnetic powder dynamometer in the device for simulating the dynamic load is calculated. The device and method can accurately simulate the load of the permanent magnet direct drive variable pitch system in the working condition, and a verification basis for the reliability and rationality of the control strategy of the permanent magnet direct drive variable pitch system is provided.

Description

technical field [0001] The invention relates to a load simulation device and method, in particular to a dynamic load simulation device and method for a permanent magnet direct drive variable pitch system of a wind turbine, belonging to the technical field of permanent magnet variable frequency drive system control. Background technique [0002] The variable pitch system in the wind turbine can automatically adjust the pitch angle when the wind speed changes, realize the maximum capture of wind energy, and ensure the safe and stable operation of the wind turbine in the high wind speed area. The traditional pitch control system adopts the transmission mode of AC asynchronous motor or DC motor with reducer. This electromechanical transmission mode has a long transmission line and many transmission links, which is prone to many failures, and the pitch transmission mechanism is generally installed on the tower In fact, once a failure occurs, it is difficult to repair and replace ...

AI Technical Summary

Problems solved by technology

At present, the verification of the control strategy of the permanent magnet drive system is usually to illustrate the effectiveness of the control strategy by simulating random or sudden loads, but this kind of method cannot fully explain the design of the control strategy in the actual working environment. performance

In addition, when the parameters of the actual permanent magnet direct drive variable pitch system are different from those of the permanent magnet motor used in the experiment, the data obtained in the experiment cannot fully explain the effectiveness of the control strategy of the variable pitch system

Images