In recent years, with the rapid development of the power grid, more and more cables are used in urban power grids. With the growing size of cable lines, a serious problem is increasingly exposed-cable line faults. The problems of fire prevention, gas prevention, explosion prevention, waterproofing and theft prevention of cable tunnels are becoming more and more important. In order to meet the ‘five preventions’ requirements of cable tunnels, the operating environment of the cables must be monitored. Problems should be discovered and handled in time to avoid major problems.
In order to meet the requirements of intelligent, information and automation of smart grid construction, the entire high-voltage cable online monitoring system uses high-speed, strong and reliable optical fiber network as the information transmission medium.It uses Ethernet technology to transmit monitoring data and MW-Ring ring Network technology guarantees the stability and reliability of data. An Ethernet switch is used at each monitoring point of the entire system to converge various monitoring signals of the monitoring point to the central monitoring station through the optical fiber ring network.