Identyfikacja stanu technicznego konstrukcji wsporczej napowietrznej linii elektroenergetycznej

Krystian Szopa,Joanna Iwaniec,Marek Iwaniec

doi:10.17531/ein.2019.1.13

Krystian Szopa, Joanna Iwaniec + Show 1 more

Open Access

https://doi.org/10.17531/ein.2019.1.13

Copy DOI

Abstract

Technical diagnostics of the overhead power line supporting structures is very important from the point of view of reliability and the national energy security. The paper presents a method of identification of technical condition of power line supporting structures. The technique is based on testing the correlation between the change of stress in the system and the change of modal parameters caused by damage. Presented approach is comprehensive and accounts for a number of problems related to the diagnostics of large-size objects of complex geometry. The basic advantage of the developed identification algorithm of the overhead power line supporting structures technical condition is low sensitivity to measurement errors, which is very important in the context of exploitational diagnostics

Highlights

Electric power is a basic energy medium, necessary for transport, industry, institutions, businesses and households
The results presented in [4] confirm that in case of an overhead power line it is important to monitor the weather loads and the line technical condition
According to the information given by Energy Regulatory Office in 2017, 54% of overhead power lines owned by the TSO (Transmission System Operator) and 36% lines owned by DSOs (Distribution System Operators) are more than 40 years old, and in the 1970s the lines were designed for 65% of currently permissible loads [21]

Summary

Introduction

Electric power is a basic energy medium, necessary for transport, industry, institutions, businesses and households. Other obstacles in identification of technical condition of large-size objects include nonlinear relationship between modal parameters and the stiffness of individual elements, identification of natural frequencies between the damaged and undamaged structure without the measurement of mode shapes, identification of the numerical model parameters based on the a priori knowledge, limited number of measurement points and the amount of obtained information, changes in boundary conditions (e.g. ambient temperature). These conclusions arise from both the literature review [10] and many studies conducted by the authors of this paper [13, 14, 23, 24]. The state of art analysis indicates that the best solution for the diagnostics of supporting structures of overhead power lines can be the methods based on the analysis of the system mode shapes, assuming a limited number of measurement points

Research object and identification of its technical

Preliminary damage impact analysis and measuring mesh

Findings

Summary