Research On Breeze Vibration Characteristics Of Overhead Transmission Lines Under Wind Load

Electricity is an efficient and clean energy source.With the development of society,the people's food,clothing,housing and transportation are inseparable from the use of electricity.In order to send light to every corner,the development of the power system is particularly important.Overhead transmission lines,as an important part of the power system,to ensure its safe operation as an important part of ensuring the normal transmission of electricity.There are many causes of transmission circuit accidents,of which the damage caused by breeze vibration is long and difficult to detect.However,it can cause serious damage to wires and other electrical hardware.And with the increase of power demand,the transmission distance and the amount of power transmission are greater,and new types of transmission lines are more prone to breeze vibration.In addition,due to the complex operating environment of transmission lines,it is necessary to study the breeze vibration characteristics of overhead transmission lines and establish a suitable detection system.In this paper,according to the breeze vibration of overhead transmission line,the static model and dynamic model of the conductor are studied,and the simulation analysis is carried out.The fiber Bragg grating breeze vibration sensor used for detecting the breeze vibration is tested and analyzed.Finally,the data of the detection is performed.Analysis.The main work is as follows:(1)For the static calculation theory of overhead transmission lines,the catenary method and the parabola method are briefly introduced,and the maximum sag of the conductor is calculated using the catenary method.The Beam188 element in the ANSYS software is used to simulate the overhead transmission line of the lead wire,and the static simulation analysis is performed.Finally,the simulation results are compared with the theoretical values calculated by the catenary line.(2)Study the basic principle and model of the breeze vibration of overhead transmission lines,calculate the theoretical value of breeze vibration frequency and amplitude,and analyze the breeze vibration characteristics of the conductor.ANSYS software was used to simulate the breeze vibration of the overhead power transmission line.The calculated wind load was loaded on the static model to obtain the vibration amplitude of the exit of the clamp during the breeze vibration.(3)Based on the breeze vibration characteristics of overhead optical fiber transmission lines,the fiber Bragg grating breeze vibration sensor for detecting breeze vibration was studied experimentally,and the fiber Bragg grating wind speed sensor was introduced.(4)Put the sensor into the transmission line to carry out the actual operation of the network,get the corresponding test data,and final y compare it with the theoretical value and simulation results.