Research and application of internet of things for high-voltage transmission line

High voltage transmission line is the key equipment in power transmission, but the safety of power transfer is threatened by some indefinitely factors such as natural calamities (hoar frost, hurricane, etc.) and deliberate damage (stealing, destroy, etc.). For these reasons, the on-line monitoring device for the high voltage transmission line is very important to guarantee the operation of power grid. How to send the monitoring data gathered by sensors that are fixed on the transmission line or tower safely and timely to the monitoring center is a very important problem that needs to be solved. Generally the place where the transmission line is set up is far away from cities and sparsely populated, the topographies are varied and complicated, the communication method which can be adopted is limited, at present the choices include general packet radio service (GPRS), optical fiber composite overhead ground wire (OPGW), 3G, etc. these communication technologies can not cover all the areas the transmission line passed, in some area, the radio signal is unstable or even does not work at all, this result in not properly sending the monitoring data back and instability of on-line monitoring data transfer. The sensory ability and communication stability of on-line monitoring devices can be improved obviously by adopting the technology of IoT. In this paper, the communication technologies in the high voltage transmission line IoT are researched and a layered scheme is proposed.