THUNDERBOLT DETECTING SYSTEM FOR ELECTRICITY TRANSMISSION LINE

摘要

PURPOSE:To detect a thunderbolt by installing sensors to detect signals for thunder surge on the constituting elements of an electricity transmission line with a distribution in the direction of the line and comparing the signals of the sensors on two different points. CONSTITUTION:The thunder surge detecting sensors 1 are installed on an overhead grounding line A and near the positions of steel towers numbered. Among these sensors 1, the distances between the steel towers #49-#7, #7-#16, #16-ST are divided to each block, and discriminating parts 2 and transmitting devices 3 are provided in each block. The thunder surge waveforms transmitted from each sensor 1 are entered to the discriminating parts 2 wherein converted to the 60Hz to make phase comparisons. An existence of the thunderbolt between the adjacent sensors 1 is thereby decided and the data are sent to the devices 3 in each block. The data on the devices 3 are sent to a central wherein a final decision for the thunderbolt is made from the phase distribution on the entire line.