Blade state monitoring device and monitoring method of wind turbine generator system

Abstract

The invention discloses a blade state monitoring device and a monitoring method of a wind turbine generator system. The blade state monitoring device comprises a sensor and a controller, wherein the sensor is arranged on a tower rack, a cabin or a generator of a wind turbine generator system with blades, and is used for monitoring the distance between the sensor and a sucking surface of a blade, and used for acquiring actual distance data between the sucking surface of the blade and the sensor; the controller is connected with the sensor so as to receive the actual distance data output from the sensor, and is used for judging the torsion state of the blade according to initial distance data and the actual distance data between the sucking surface of the blade and the sensor. According to the blade state monitoring device, as the distance between the sensor and the blade is monitored through an external sensor, and whether the torsion deformation of the blade is too large or not is judged according to the acquired actual distance data and the initial distance data, whether the blade has the risk of cracking or structural abnormity or not can be judged, corresponding measures such as repairing can be taken in time, the loss caused by blade cracking can be reduced, and meanwhile the cost of blade component replacement can be reduced.

Description

technical field [0001] The invention relates to the technical field of wind power, in particular to a monitoring device and a monitoring method for monitoring the torsional deformation state of blades of a wind power generating set to determine whether the blades are cracked or other structural abnormalities cause excessive torsion. Background technique [0002] In recent years, the domestic wind power industry has developed rapidly. Taking 2015 as an example, the national installed capacity reached 32.97 million kilowatts. [0003] As the installed capacity increases every year, the problems brought about are also highlighted. Due to the fact that most of the blades are processed and manufactured manually, in the production, process and quality control, if there is a defect in a certain operation, After the wind farm has been installed and operated for a period of time, events such as blade cracking, power drop, blade breakage, and even the overall collapse of the whole mac...

AI Technical Summary

Problems solved by technology

However, its sensors need to be installed inside the blades in a special way. Not only is the structure complex, the assembly is difficult, and the manufacturing cost is high, but also the measurement accuracy and stability are poor. Once the monitoring system itself fails, it needs to be shut down for inspection. Difficult to repair and high maintenance cost

In addition, it is not suitable for upgrading the wind turbines that have been put into use

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