A wind turbine blade damage monitoring system and method

Abstract

The invention discloses a wind power generating set blade damage monitoring system and method. In the present invention, the electric tackle is connected to the main control of the wind turbine, and the electric tackle can be moved together with the yaw of the group according to the yaw signal provided by the main control of the wind turbine. The distance between the laser reflection points of the target blade is obtained by the damage range finder, and the Obtain the slope distribution of the blade along the span direction, and according to the comparative analysis of the distance between the range finder and the laser reflection point of the target blade and the slope distribution of the blade along the span direction, the unit executes power limit (pitch change) or stops to prevent damage to the blade Accidents happened to the unit. This method avoids the cumbersome process of pre-embedding sensors during blade manufacturing, and at the same time reduces the risk of lightning strikes caused by additional sensors on the blades, ensuring the safety of the unit. At the same time, the blade damage monitoring and control method has multiple execution modes, which can not only ensure the safe operation of the unit, but also avoid frequent shutdowns and ensure power generation.

Description

technical field [0001] The invention relates to the technical field of health monitoring of wind turbine blades, in particular to an online monitoring system and method for wind turbine blade damage. Background technique [0002] In recent years, with the increase in the installed capacity of wind power generators and the continuous increase in the capacity of single machines, extremely high requirements have been put forward for the safety, reliability and operation stability of wind power equipment. Wind turbine blades are components that directly capture wind energy, and their service status has a great impact on the safe operation of the entire wind turbine. Because blades need to withstand external erosion such as strong wind load, rain and snow, sand erosion, ultraviolet radiation, atmospheric oxidation and salt spray corrosion for a long time during their service, the service environment of blades is complex and harsh, which poses a great threat to the service safety ...

AI Technical Summary

Problems solved by technology

However, after the blades are installed on wind power towers tens of meters high, the working environment is harsh, and they are prone to defects and damage and can be expanded.

The aforementioned non-destructive testing methods are difficult to be applied to the testing of tower blades, so that the defects and damages of the blades cannot be found in time

Images