Research On Converged Communication Network Scheme In Transmission Line Online Monitoring

In recent years,the development of the power condition based maintenance and the construction of smart grid make the development of transmission line online monitoring system.Transmission line is responsible for many tasks,such as the power transmission from west to east and so on,which plays a vital role in the development of the national economy.But with the development of online monitoring system,communication method has become the bottleneck in the development of the whole system,how to carry out the system of communication,ensure safety and reliability of the data transmission,it has a long-term impact on the construction and development of online monitoring system and smart grid.Single mode of communication can not meet the requirements of high bandwidth,large capacity and high reliability in the data transmission of smart grid,so the converged communication network is playing a more and more important role.The converged networking can converge the wired/wireless technology with optical fiber,converged closely together,which has great application value.First of all,this paper studies the network structure,node,link and function of online monitoring system,and comparatively analysis the public network,optical fiber,private network and satellite communication technology,such as network bandwidth,reliability and so on;then based on the key technology of 5.8G,it focuses on the analysis of anti jamming performance of OFDM and make simulation with Matlab;based on the data converged method of 5.8G and OPGW,the converged network scheme based on 5.8G optical fiber communication is proposed,and design the converged communication module,node and power supply device;finally,we make pilot application in Hou Qiao substation 330 kV,and use Linkplanner to do link simulation and link budget,the data analysis proves the feasibility of the scheme.In this paper,we put forward converged network scheme based on 5.8G optical fiber converged communication,not only a combination of optical fiber communication,which is large capacity,high bandwidth and long distance,but also use the advantages of5.8G,such as free,flexible and efficient transmission,it solves the problems of no fiber access point or blind area in public network communication,and meets the bandwidth requirements of high-definition video,ensures real-time and reliable operation of transmission line on-line monitoring system,which has certain reference value for the its construction and maintenance.