Lightning strikes are of great importance for the electricity sector, being frequently responsible for disconnections of transmission lines, which can trigger a sequence of events that lead to the interconnected electrical system to collapse. The objective of this work is to propose a new methodology to correct the grounding resistances of the LT Oriximiná / Silves CD 550kV electric power transmission line in the Amazon aiming to reduce the occurrences of shutdown by disruptive return discharge, or backflashover, mitigating the damages caused to the system. electrical, considering the implementation cost factors, environmental technical feasibility, abruptness of the solution for other line structures, percentage of implementation reduction, it was concluded that the most adequate solution to implement a more robust grounding solution in the towers of the line transmission is the 03 solution tested on the 585 tower with a 66.98% reduction.
|
