| In recent years,the power system has developed rapidly,and the scale of overhead power lines with long-distance has become increasingly large.In order to prevent major accidents caused by faults during the operation of the power line,it is necessary to maintain the power line frequently and eliminate hidden safety hazards timely.Nowadays,we mainly use the method called manual inspection in system maintenance.This method has the disadvantages of low efficiency in detection and heavy inspection workload,especially in some remote areas,the difficulty of inspection is increased,which can not meet the requirements of reliability,real-time and safety of power transmission lines.In this paper,the technology of advanced measurement,information processing and communication are used to realize remote sensing and detection through cloud platform,and continuous or timed online monitoring system is applied to the operation and maintenance of power transmission lines to improve the management efficiency of power transmission lines.Firstly,this paper introduces the natural disasters suffered by power transmission lines,introduces the current research status of online monitoring system in power transmission line at home and abroad,and expounds the key technologies of online monitoring system in power transmission line based on cloud platform,such as network communication technology,cloud platform technology and conductor state calculation model,so as to lay a theoretical foundation for establishing an online monitoring system.Secondly,the front-end hardware,cloud platform and web page development part of the online monitoring system are researched and designed.As the core,the front-end status monitoring unit with STM32 microcontroller mainly includes: acquisition module,controller module,communication module and power module,which realizes the collection of various status on site and uploads it to the cloud platform through GPRS communication for the inspection personnel to review.The design of the cloud platform mainly includes the deployment of the software running environment of the cloud server and My SQL database management system.Combined with the designed front-end collection system,the remote control and data storage of the front-end collection system are completed.By combining dynamic webpage technology with database technology,and using PHP technology to develop the webpage of online monitoring system,users can access the online monitoring system without space constraints,which is practical.Finally,the on-line monitoring system is debugged,the test results verify the effectiveness and reliability of the system,the modules of the system work normally,and the design scheme of the power transmission line on-line monitoring system based on cloud platform is implementable. |