Monitoring Of Micrometeorology And Analysis Of Influence On Overhead Transmission Line

Electricity is an important basic industry and public utilities related to the national economy and the people's livelihood.Safe,stable and sufficient power supply is a necessary condition to ensure the healthy,stable and sustainable development of our national economy.Because a lot of overhead transmission lines are far away from cities and towns,and they are likely to pass through complex environments such as mountains,canyons,rivers,lakes and jungles,and their climate and environment are different from that of cities,and can not be represented by the average meteorological stations issued by urban meteorological stations.At the same time,a large number of studies also show that micro meteorology has a great impact on the performance of overhead transmission lines.Therefore,it is necessary to introduce the concept of micro meteorology to strengthen the micro meteorological information monitoring and influence analysis around the overhead transmission lines,so as to ensure the safe and reliable operation of the power grid.This paper first introduces the background of the research and the status of the research at home and abroad,and gives the monitoring requirements and technical specifications of the micrometeorological monitoring system,then expounds the overall design scheme of the monitoring system,and then introduces the design of the hardware module and the software program design of the monitoring system,and the system of the meteorological monitoring system.The experimental test was carried out.Then the influence of meteorological elements on overhead transmission lines is analyzed.First,the breeze vibration of the overhead line caused by the wind is analyzed,and the fatigue assessment process of the air line under the breeze vibration is deduced.Then the distribution of stress state of overhead line caused by temperature is analyzed,and the stress state of strands under normal temperature,different temperature and different radial temperature difference is analyzed.The main contents are as follows:1.A micrometeorological monitoring system is designed.According to the monitoring specification and design requirements,the overall design scheme of the monitoring system is expounded,the overall scheme and the frame diagram of the monitoring system are given,and the selection of each module,the working principle of the module and various technical parameters and the circuit interface principle diagram are described,including the ARM micro controller module and the serial communication.Module,JTAG module,temperature and humidity,air pressure,wind speed and direction monitoring module,OLED display module and SD card storage module.Then the software program of monitoring system was designed,including temperature and humidity,air pressure,wind speed and wind direction monitoring program,OLED display program,storage program,and experimental test of the meteorological monitoring system.2.The influence of meteorological elements and temperature on overhead transmission lines is analyzed.Considering the joint probability of wind direction and wind direction,the fatigue life of overhead transmission lines under the breeze vibration is evaluated with the Miner cumulative damage calculation theory.The stress state of the overhead ground wire under normal temperature and the overhead wire under the same temperature and different radial temperature difference are simulated and analyzed by the ANSYS software.The stress distribution of the line strands.