Device for monitoring inclination and settlement of tower of wind generation set

Abstract

The invention belongs to the field of wind power generation and particularly relates to a device for monitoring inclination and settlement of a tower of a wind generation set. The device is characterized by comprising a laser transmitting and receiving unit, a signal processing and operating unit, a communication unit and an upper computer; the laser transmitting and receiving unit is composed of three laser distance measuring sensors and three laser baffle boards; the laser distance measuring sensors are used for measuring the distance between the sensors and the baffle boards. When the tower inclines or settles, the distance between the sensors and the baffle boards, namely detection data of the three laser distance measuring sensors, are changed, the detection data are processed through an algorithm in the signal processing and operating unit, results obtained through operation are sent to the upper computer to be displayed in real time through the communication unit, and the inclination angle and the settlement distance of the tower are obtained. According to the device, online monitoring for inclination and settlement of the tower of the wind generation set is achieved by combining the laser distance measuring and multi-point positioning technique with an effective calculation method, and the device has the characteristics of being accurate and high in precision.

Description

technical field [0001] The invention belongs to the field of wind power generation, and in particular relates to a tower tilt and settlement monitoring device of a wind power unit. Background technique [0002] Wind power is a kind of renewable green energy that the country advocates to vigorously develop. It can effectively save water and coal resources, reduce air pollution, and has far-reaching significance for protecting the ecological environment. Compared with thermal power and nuclear power, wind power has a small unit capacity and covers a large area. Wind farms are usually located in remote areas, and the technical and operating conditions are generally poor. Therefore, the reliability and safety of wind power systems are very important. The wind turbine tower is the main load-bearing part of the wind turbine, and the design duty cycle is 20 years. As the capacity and height of wind turbines increase, inclination and settlement are very likely to occur under differ...

AI Technical Summary

Problems solved by technology

As the capacity and height of wind turbines increase, inclination and settlement are very likely to occur under different geological conditions, which will bring hidden dangers to the safety of the turbines. At present, each wind farm needs to manually measure the tower foundation on a regular basis, which consumes a lot of financial resources. manpower

[0003] The current method mainly uses the change of the conductance in the liquid pendulum tilt sensor to measure the tilt angle proportional to the change of the tilt angle; there is also the use of the piezoresistive acceleration sensor to measure the tilt angle. This method has the characteristics of high frequency response, high precision and high sensitivity. , but because the sensor needs to measure the three directions of X, Y, and Z at the same time, although the design of the three signals from the sensitive element to the filter and the amplifier circuit adopts the same parameters, it is still very difficult to achieve a complete match, so the three The full-scale output in the direction (the analog output before A / D acquisition) cannot be exactly the same, it must be corrected with digital quantities, and because it is made of semiconductor materials, it is greatly affected by temperature, so it must be adjusted when using it. Temperature compensation, in the form of circuits to compensate thermal zero point drift and thermal sensitivity drift, using hardware compensation requires a lot of experiments, and there may be large deviations at some points

The above-mentioned method of measuring inclination has inherent shortcomings for the application of wind turbine towers in complex environments

With the increase of working hours of wind turbines, it is increasingly urgent to solve the problem of wind turbine tower settlement and inclination. The current manual measurement method in the wind field cannot guarantee real-time performance and sufficient accuracy, and is doomed to be impossible for long-term application.

Many domestic research institutions and wind turbine manufacturers have also carried out related research on the diagnosis and status monitoring of wind turbine tower settlement and tilt. For example, the wind turbine tilt detection device is used to detect the maximum value and maximum position of the wind turbine tilt in real time. Although unmanned online detection can be carried out and the technical indicators required by users can be obtained, it is not feasible to install a level around the fan, the lighting system is unreliable, and the overall structure is relatively complicated and the cost is high

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