Development of Manhole Monitoring System using the Existing Power Cables as Transmission Line

Abstract

The realization of condition based maintenance for underground transmission lines is of particular interest to advance the maintenance utilizing the digital transformation. As a problem, it was difficult to develop an inexpensive, secure, and reliable communication method for information transmission from the manhole in a conduit. We have developed a manhole monitoring system by applying power line communication technology, in which a metal shielding layer of power cables is used as a transmission line. This paper describes the development of a system to collect sensor information and camera images using a 154kV and a 66kV XLPE cable installed in a conduit manhole.