小電力無線伝送を利用した送電線保守情報システム

抄録

Composite Fiber-optic Overhead Ground Wires (OPGWs) have been installed to major power transmission lines. Using these OPGWs, maintenance information systems for power transmission lines have been developed and put into practice. In these systems, however, both sensors and fiber-optic data transmitters are restricted to install on the towers where the OPGW-splicings are made, thus resulting in the restraint of system functions. The authors proposed the application of low-power radio channels and studied the methods both for sensor-signal and OPGW-interpolating data transmission. Specifically, for sensor-signal transmission, it is shown that the method combined with distributed transmission timing and slotted CSMA has superior data transmission performance against hidden terminal problem. Also for OPGW-interpolating data transmission, it is shown that the method using 3 channels of low-power radio has superior performance in view of effective use of radio wave resources. With these results, both sensor-signal and OPGW-interpolating data transmission systems are manufactured and confirmed their practical effectiveness by the field tests.