Offshore floating type wind turbine generator foundation motion monitoring method based on current signals

Abstract

The invention provides an offshore floating wind turbine generator basic motion monitoring method based on current signals. The method comprises the following steps that a transmission chain mechanical system dynamic model, a model for controlling a voltage of a generator rotor dq axis by a generator side converter and a generator equivalent circuit model are established; a transmission chain electromechanical coupling system dynamic model is established according to the transmission chain mechanical system dynamic model, the generator equivalent circuit model and the generator rotor dq-axis voltage control model, and the transmission chain mechanical system vibration response caused by the basic motion is calculated to obtain the transmission chain mechanical system characteristic frequency; the generator stator current response is calculated in combination with a generator equivalent circuit model, the generator stator current characteristic frequency is calculated, and a basic motion-mechanical vibration-current signal mapping relation is obtained. A generator stator current signal is monitored, and the basic motion condition is obtained according to the amplitude change of the characteristic frequency of the current signal and the basic motion-mechanical vibration-current signal mapping relation.

Description

technical field [0001] The invention relates to the technical field of wind power generating sets, in particular to a method for monitoring foundation motion of offshore floating wind generating sets based on current signals. Background technique [0002] Over the past decade, the global wind energy industry has gradually migrated from land to sea. The floating foundation support structure of wind turbines is more suitable for deep sea areas with a water depth greater than 60m than the fixed foundation. Vibration will affect the various components of the wind turbine. [0003] In the prior art, sensors are usually installed on the floating foundation support structure to monitor the foundation movement of the wind turbine, but this method requires the installation of multiple sensors, and additional monitoring systems need to be configured separately, resulting in increased costs. In addition, as the number of measurement points increases, the failure rate of the entire wi...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the existing technology, the present invention proposes a current signal-based monitoring method for the foundation motion of the offshore floating wind turbine to solve the problem of increasing the equipment cost of the monitoring system by installing multiple sensors to monitor the foundation motion of the wind turbine in the prior art, and The technical problem that the reliability of monitoring is difficult to be effectively guaranteed

Images