Ultrasonic measurement system for wind speed before wind wheel of wind turbine

Abstract

The invention relates to an ultrasonic measurement system for a wind speed before a wind wheel of a wind turbine. The ultrasonic measurement system comprises at least one data acquisition module installed in a hubcap and a data acquisition processor installed in a cabin. The data acquisition module is composed of an airspeed sensor and a gyroscope, wherein the gyroscope is integrated on an airspeed sensor base. The data acquisition processor is integrated with a temperature and humidity sensor, an air pressure sensor, a data acquisition card and a data processing and analyzing module, wherein the data acquisition card is connected with the airspeed sensor, the gyroscope, the temperature and humidity sensor and the air pressure sensor through data lines, and is used for transmitting acquired data to the data processing and analysis module for data processing and analysis; and the data processing and analysis module comprises a working condition sound velocity calibration module, a parameter correction module, a state monitoring module and an online measurement module. With the ultrasonic measurement system, the wind speed and wind direction values of incoming flow before the wind wheel of the wind turbine wind can be accurately measured, the power generation efficiency of the wind turbine is improved, and the problem of measurement uncertainty caused by measurement for wind speed behind the wind wheel is solved.

Description

technical field [0001] The invention belongs to the field of wind power generation, in particular to an ultrasonic measurement system for wind speed in front of a wind rotor of a wind turbine. Background technique [0002] With the rapid development of wind power technology, how to convert wind energy into electrical energy with maximum efficiency through wind turbines has become an important content of wind power technology research. Due to the randomness of the incoming wind speed and the large sweeping area of ​​the wind turbine, the current industry usually uses the incoming wind speed at the center of the front hub of the wind rotor as the reference wind speed for the control system. In addition, the wind speed value at the center of the front hub of the wind turbine rotor and the incoming flow angle are important indicators for drawing the power curve and evaluating the load level of the wind turbine. Therefore, the accuracy of incoming flow speed detection is an impo...

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Problems solved by technology

[0008] The purpose of the present invention is to provide a wind speed ultrasonic measurement system in front of the wind wheel of a wind turbine, which solves the problem of high installation accuracy requirements in the prior art, lack of equipment fault tolerance and self-correction functions, resulting in the need to dismantle and reinstall to destroy the rigidity of the hubcap if the installation is inaccurate, and The wind measurement results are affected by large components such as wind rotors and nacelles, the measurement results are inaccurate, and the existing technology leads to installation differences between devices, resulting in the need to perform parameter calibration for each device separately

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