Evaluation of Multivariable Modeling Methods for Monitoring the Health of Guyed Towers in Overhead Power Lines.

Alexandre Schalch Mendes,Eduardo Rodrigues De Lima,Pablo Siqueira Meirelles,Larissa Medeiros De Almeida,Janito Vaqueiro Ferreira,Eurípedes Guilherme De Oliveira Nóbrega

doi:10.3390/s21186144

Abstract

This article proposes a methodology for monitoring the structural stability of each tower of an electric power transmission line through sensor measurements which estimates the different situations that may indicate the need for intervention to prevent the structure collapsing. The extended Kalman filter was adopted to predict the failures, considering sensor fusion techniques such as the displacements of the upper central position of the tower above certain limits. The load of the stay cables is calculated from the natural frequencies, which are determined by the accelerometers connected to the cables. The average value of these forces, which must be higher than a normal limit, were calculated to predict a failure. All guyed towers of a power transmission line thousands of kilometers long will be individually monitored considering the methodology described in this study, which makes this article one of the first relevant research studies in this area. Typically, guyed towers must often be manually inspected to ensure that the stay cables have acceptable pretension to prevent a lack of stability in the transmission line towers.

Highlights

KhodaeiThe collapse of the guyed towers of power transmission lines is often caused by the break or relaxation of the cables due to environmental erosion, especially in old structures.the guyed towers of power lines require maintenance due to the time-varying degradation of the strength of the corroded cable during its service life and its corresponding impacts on the reliability of the entire structure
The major advantage of using guyed towers in power transmission lines is related to the economical savings due to the reduction in structural material, which in some cases can represent more than 20–40% of costs, according to [3]
This study proposed a method to prevent the collapse of the guyed towers of a transmission line using modern techniques for monitoring the degradation caused by environmental factors and foundation failures, which are among the less predictable causes of tower collapse

Summary

Introduction

KhodaeiThe collapse of the guyed towers of power transmission lines is often caused by the break or relaxation of the cables due to environmental erosion, especially in old structures.the guyed towers of power lines require maintenance due to the time-varying degradation of the strength of the corroded cable during its service life and its corresponding impacts on the reliability of the entire structure. The collapse of the guyed towers of power transmission lines is often caused by the break or relaxation of the cables due to environmental erosion, especially in old structures. The major advantage of using guyed towers in power transmission lines is related to the economical savings due to the reduction in structural material, which in some cases can represent more than 20–40% of costs, according to [3]. With the displacements of Points 5 and 50 , it is possible to determine the displacement of the tower’s top center and the angles in its base position These three angles correspond to the elements of the state vector, as estimated by the Kalman filter in each interaction

Methods

Results

Conclusion