Method and device for measuring icing amount of wind turbine blades

Abstract

The invention provides a wind generating set blade icing amount measuring method and a wind generating set blade icing amount measuring device, which can effectively and accurately calculate an icing amount of a wind generating set blade, and can effectively avoid the situation that a sensing and acquisition system fails due to the influence of lightning, salt mist, high and low temperature at day and night, strong electromagnetic interference and the like by taking a fiber bragg grating strain sensor as a sensing unit for blade load data acquisition. A blade icing amount measuring system adopting the fiber bragg grating strain sensor has the advantages of being simple in wiring and easy in high-capacity networking measurement, and is extremely suitable for large-scale industrial application.

Description

technical field [0001] The invention relates to the field of ice-covered monitoring of blades of a wind-driven generator set, in particular to a method for measuring the amount of ice-covered blades of a wind-driven generator set and a measuring device thereof. Background technique [0002] At present, my country's wind resources are basically distributed in the icy and snowy north and the very humid south, where the environment is extremely harsh. When wind turbines operate under low temperature conditions below zero degrees Celsius, if they encounter humid air, rain, salt spray, ice and snow, especially when encountering supercooled water droplets, freezing often occurs. Ice-covered wind turbine blades will cause serious harm to the normal operation of wind turbines. [0003] After the blade is covered with ice, a large ice load will be generated, which will greatly reduce the service life of the blade. At the same time, due to the different ice loads on each blade, the ...

AI Technical Summary

Problems solved by technology

Disadvantages of this method: It is necessary to manually judge the icing situation, and judge whether it needs to be shut down and started up based on this method. Human factors interfere greatly, are inaccurate, and have serious safety hazards, etc.

[0007] Second, monitor the icing condition of wind turbine blades through resistive strain sensors, etc. However, due to the extremely harsh structure and operating environment of wind turbines, they cannot operate normally, such as lightning strikes, salt spray, high and low temperature day and night, and strong electromagnetic interference. It is very easy to fail under such conditions; at the same time, the wiring of this type of sensor is complicated, and it is not easy to measure in a large-capacity network

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