Method and system for measuring residual life of fan tower

Abstract

The invention discloses a method for measuring the residual life of a fan tower. A finite element analysis model of the fan tower is constructed, modal analysis is carried out, a stress matrix of all positions of the fan tower at any historical wind speed is obtained through calculation according to obtained historical wind speed data and historical wind direction data, tower material life loss factors at all the positions of the tower under any historical wind speed are obtained, a life loss factor expected value matrix caused by fan tower loads in unit time under all historical wind speeds in unit wind direction is obtained through calculation, the life loss factor maximum expected value is obtained, and the actual perpendicularity of the fan tower is obtained through measurement; and according to the actual life factor corresponding to the actual perpendicularity, a life degradation factor of the fan tower is obtained, and the actual residual life of the fan tower is obtained through calculation. According to the method and system, historical wind speed and wind direction statistical data and fan tower design data are combined through a computer-aided technology, and the residual life of the fan tower is accurately analyzed.

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