A method and system for measuring the remaining life of a fan tower

Abstract

The invention discloses a method for measuring the remaining life of a fan tower. The finite element analysis model of the fan tower is constructed and the modal analysis is carried out. The stress matrix of each position of the tower can be obtained, and the life loss factor of the tower material at each position of the tower under any historical wind speed can be obtained, and the expected value matrix of the life loss factor caused by the load of the fan tower in unit time under all historical wind speeds in the unit wind direction can be obtained, and the life can be obtained The maximum expected value of the loss factor is measured to obtain the actual verticality of the fan tower; according to the actual life factor corresponding to the actual verticality, the life degradation factor of the fan tower is obtained, and the actual remaining life of the fan tower is calculated. The invention combines historical wind speed and wind direction statistical data with fan tower design data through computer aided technology to accurately analyze the remaining life of the fan tower.

Description

technical field [0001] The invention relates to the technical field of wind turbine tower life prediction, in particular to a method and system for measuring the remaining life of a wind turbine tower. Background technique [0002] The tower of the wind turbine is the load-bearing part of the wind turbine. It mainly plays a supporting role in the wind turbine and absorbs the vibration of the turbine. The tower is subjected to complex and variable loads such as thrust, bending moment and torque load, so that during the operation of the wind turbine, the tower will have a certain degree of deformation such as swaying and twisting. In addition, the tower will also be subject to material changes, zero Influenced by factors such as component failure and foundation settlement, the slope will be tilted, resulting in a certain deflection. Excessive tilt deformation of the tower will cause the load of the tower to deviate from the design value during the actual operation of the wind...

AI Technical Summary

Problems solved by technology

Excessive tilt deformation of the tower will cause the load of the tower to deviate from the design value during the actual operation of the wind turbine, which will increase the life loss of the tower, affect the normal operation of the wind turbine, and cause serious safety accidents. Therefore, it is necessary to repair the wind turbine Real-time detection of verticality and tower safety to ensure that the life loss of the tower is maintained within the normal range

[0003] The patent publication number is CN113374652A. The wind turbine life assessment method uses meteorological data to carry out finite element analysis on the wind turbine load, and corrects the use of the real name of the tower, but it cannot directly predict the current state of the tower through the tower inclination angle remaining life

The patent publication number is CN112796953A. The wind turbine tower life prediction method needs to install multiple displacement sensors at each flange, and needs to check and check the bolt pre-tightening force. The operation is complicated and costly, and it is difficult to perform large-scale application

Images