Design And Application Of Inclination Monitoring System For Transmission Pole And Tower

Leaning management of transmission pole and tower in power grid,at present,is still in the stage of regularly patrol line and visual observation by the operation and maintenance personnel.So there are no systematic methods for accurate measurement of tower inclination data and effective prediction and operation of leaning variation trend.The inclination of the pole and tower is a hidden equipment defect affected by various factors,that is,the stress imbalance of the tower is slowly changing,and it is difficult to see the change trend through the naked eye observation.At the same time,manual inspection also needs to invest a lot of manpower and effort.When the operators found the tower tilted,the tower itself has broken the inherent force balance,and the reliability and security of transmission line have been in jeopardy.According to the statistical analysis of the line failures of the State Grid Corporation in recent years,it is found that the number of power outages caused by the collapse of the poles and towers has risen significantly in recent years.Therefore,it is urgent to design a monitoring system which can monitor the transmission pole and tower for a long time and real-time,and analyze the change trend of the tower through the data over the years,and provide guidance strategy for line maintenance.This paper first analyzes the existing domestic and foreign transmission tower inclination monitoring devices,and these devices can realize the accuracy and timeliness of transmission tower inclination monitoring to a certain extent.However,there are still some main problems existing in these devices.For example,the inclination sensor is not accurate.Besides,because the communication technology uses different means,the requirements for communication conditions of transmission pole and tower are not satisfied by State Grid Corporation.The Sensor type is single,so the sensor is not enough for signal collection of external factors that influence the inclination of pole and tower.In order to solve the problem of sampling accuracy,communication technology and the single sensor problem,according to the communication technology standard of the transmission line monitoring equipment of the State Grid Corporation of China,GSM communication technology are used in this paper.The external factors causing tower inclination are analyzed,by combined with the natural situation of the local power supply range,the wind direction and wind speed sensors are determined to be used to strengthen the monitoring of wind information.Through the comparative study for the working principle of dip angle,wind speed and direction of wind sensor,the inclination angle sensor with high cost performance,high accuracy and strong function is used as the acquisition unit of the system.Finally,this paper uses STM32 chip as the core of data processing,and based on the means of GSM communication,through the measurement of the operation characteristics of the pole and tower by using the wind sensor and angular speed sensor,the online inclination monitoring system of transmission pole and tower is designed.The system can complete the terminal tower information acquisition and SMS warning reminder,which make the host computer to realize the animation of the pole and tower.On this basis,according to the historical failure data of Power Supply Company,different types of poles and towers are selected to install the designed system in the field.After obtaining the information collected,the causal relationship between the transmission pole and tower and the wind force factors in the island area is analyzed.The results show that the designed pole and tower monitoring system can guide the line operators to maintain the pole and tower pertinently.