Variable-pitch system for detecting snow covering rate of fan blades

Abstract

The invention relates to a variable-pitch system for detecting a snow covering rate of fan blades. The variable-pitch system comprises a detecting sensor, a detecting signal emitting and receiving device, a data processing device and a control device, wherein the detecting sensor is used for detecting snow covering thickness of the fan blades, a fan blade temperature, environment wind power and awind direction, and comprises a snow covering thickness sensor and a temperature sensor, which are mounted on the fan blades, an environment air speed sensor which is mounted on a fan pole; the detecting signal emitting and receiving device is used for emitting a detecting signal to the detecting sensor and receiving a real-time data signal acquired by the detecting sensor; the data processing device is used for receiving the real-time data signal, processing the real-time data information to obtain fan blade snow covering rate; and the control device is used for performing pitch varying and yawing operation of the corresponding mode on the fan variable-pitch system and the yawing system according to the fan blade snow covering rate. The variable-pitch system can effectively improve fan operation efficiency, improves windy covered snow treatment ability, effectively avoids harm caused by icing of the fan, and protects the fan better.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a pitch-changing system for detecting the snow-covered rate of fan blades. Background technique [0002] With the shortage of energy and the deterioration of the ecological environment, wind turbines are used more and more widely around the world, not only in areas with more suitable climates, but also in areas with relatively cold climates. In cold areas, affected by the weather, wind turbines are likely to be covered with snow on the blades due to the influence of snowfall. As the snow cover thickens, the blades of wind turbines are prone to icing, which increases the weight of the blades, making The aerodynamic performance of blades decreases, which affects the efficiency of wind power generation. Therefore, it is particularly important to effectively solve the problem of snow covering blades to ensure the efficient operation of wind turbines. [0003] At presen...

AI Technical Summary

Problems solved by technology

However, in the case of emergency shutdown of the wind turbine, insufficient wind power, and snow-covered mountainous environment, the snow cover of the wind turbine will be more serious. If the snow cover is not cleaned up in time, it will not only reduce the power generation efficiency, but when the snow cover turns into ice and snow, The cleaning work will be more cumbersome and may cause damage to the fan

The reason is that at present, most fan deicing methods shake off the ice by shaking the blades due to rapid deceleration when the fan blades are rotating. This method is also a loss to the life of the fan parts.

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