A Practical Health Index for Overhead Conductors: Experience From Australian Distribution Networks

Naranpanawe, Lakshitha; Ma, Hui; Saha, Tapan Kumar; Lee, Colin; Ghosal, Ayan

doi:10.1109/access.2020.3042486

Cited by 13 publications

(5 citation statements)

References 10 publications

(23 reference statements)

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“…Then, the Gompertz-Makeham mortality model [9,14] can be applied. This model aligns with the exponential acceptance of equipment aging and mortality pattern and can be described by Equation (5).…”

Section: Life Curve Using Gompertz-makeham Mortality Model Based Fail...mentioning

confidence: 82%

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Age Estimation of Transmission Line Using Statistical Health Index and Failure Probability Curve-Fitting Method

Suwanasri,

Yongyee,

Suwanasri

2024

Energies

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The aging process of transmission lines has a direct impact on the reliability and safety of the power grid. Therefore, an accurate age estimation method is imperative for effective maintenance planning and infrastructure investment. This paper introduces a systematic methodology for estimating the age of overhead transmission lines, utilizing the percentage statistical health index (%SHI) and the failure probability curve-fitting (FPCF) method. The %SHI, employing a scoring and weighting approach derived from test results and inspections, is used to assess the actual condition of transmission line equipment. Additionally, the FPCF approach is applied to illustrate the connection between the SHI and the likelihood of failure, facilitating the assessment of transmission line age by fitting failure probability curves to the SHI data. This age is directly associated with the probability of experiencing a failure. The evaluation was conducted on 924 towers situated along four transmission lines connecting the 115 kV substations S1–S2, S3–S4, S5–S6, and S7–S8. These transmission lines are in four regions with diverse terrain and environments such as mountains, rice fields, and more. In the SHI calculation, practical testing results and historical failure data were applied. The results clearly indicate that there were notable disparities in the age estimations for transmission lines in diverse geographical regions of Thailand when compared to their actual ages. These discrepancies can be attributed to various factors, including the local environment, such as rainfall, flooding, and salt-laden air as well as specific geographical features like mountainous and coastal terrain. To mitigate the deterioration of transmission lines in all regions, it is essential to implement a proactive maintenance strategy. This strategy should involve more frequent inspections, the use of advanced monitoring technologies, and the establishment of robust maintenance procedures, with which it would become possible to enhance the accuracy of equipment condition assessments, ultimately resulting in an overall improvement in the reliability of transmission lines.

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Section: Life Curve Using Gompertz-makeham Mortality Model Based Fail...mentioning

confidence: 82%

“…In this research, an age assessment method for transmission lines was implemented, relying on statistical data derived from the percentage health index (%HI) calculation [5][6][7] of overhead transmission lines. This statistical %HI was established using a scoring and weighting method [8].…”

Section: Introductionmentioning

confidence: 99%

Age Estimation of Transmission Line Using Statistical Health Index and Failure Probability Curve-Fitting Method

Suwanasri,

Yongyee,

Suwanasri

2024

Energies

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“…In [7], they evaluate the lines in a similar way to [6], but also consider the surrounding environment where the lines are installed. In [8], they evaluate the condition by reflecting the material condition of the lines in more detail than in [6,7]. The health index is evaluated by considering the distance from the beach to the lines, the pollution level of the surrounding air, and the diameter of the lines.…”

Section: Tb541mentioning

confidence: 99%

Development of Methods for an Overhead Cable Health Index Evaluation That Considers Economic Feasibility

Lee,

Han

et al. 2023

Energies

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To supply stable and high-quality power according to the advancement of industrial growth, electric power companies have performed maintenance of power facilities using various methods. In the case of domestic power distribution facilities, there are limitations in performing diagnostic management on all facilities owing to the large number of facilities; therefore, old facilities are managed using the health index assessment method. The health index assessment comprises only facility operation data and external environmental data and is managed only for four types of distribution facilities including overhead/underground transformers and switchgears. In the case of high voltage overhead lines, there are a large number of wires such as transformers and switchgears connected to the lines, and the ripple effect of power outages is large. However, in Korea, there is no overhead line health index standard. In overseas cases, a health index for overhead lines was developed, but only the material characteristics and surrounding environment of the overhead lines were considered and economic feasibility was not considered. Therefore, in this paper, we developed a health index evaluation methodology for ultra-high voltage overhead lines that considers economic feasibility. In this paper, unlike the existing health index evaluation method that uses only operational data and external environmental data to determine facility performance evaluation and aging replacement standards, we developed an economic health index evaluation methodology that additionally considers failure probability and risk costs. Using the health index assessment methodology developed in this paper, it is possible to expect a reduction in facility operating costs and investment costs from the perspective of the electric power companies through the replacement of old extra-high voltage overhead cables. In addition, from the perspective of consumers, it is expected to increase power reliability and reduce the ripple effect of failure by preferentially replacing equipment with a high probability of failure.

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“…Prior studies (De La Fuente et al, 2018;Durán et al, 2020;Serra et al, 2019) have made efforts to define asset health indices. Recently, there has also been a focus on AHI (Gubeljak, Lovrenčić, Bakič, et al, 2020;Naranpanawe et al, 2020; in relation to OHTL as well.…”

Section: Asset Health Index (Ahi)mentioning

confidence: 99%

Analiza dejavnikov ribolovne učinkovitosti v metierjih Severnega Atlantika

Jerebic¹,

Kajzer²,

Goričan³

et al. 2021

40th International Conference on Organizational Science Development Values Competencies and Changes in Organizations

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The management of fishing fleets is an important factor in the sustainable exploitation of marine organisms for human consumption. Therefore, regulatory services monitor catches and limit them based on data. In this paper, we analyze North Atlantic Fishing Organization (NAFO) data on North Atlantic catches to direct the effectiveness of fishing stakeholders. Data on fishing time (month and year), equipment, location, type of catch, and, for us, the most interesting, data on the fishing effort are given, and their quality is analyzed. In the last part, The Principal Component Analysis for individual activities, among which fishing stakeholders can decide, is performed on a selected data sample. The complexity of the connections between the set of observed activities is explained by new uncorrelated variables - principal components - that are important for achieving the expected fishing catch. We find that the proportions of variance explained by the individual principal components are low, which indicates the high complexity of the topic discussed.

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A Practical Health Index for Overhead Conductors: Experience From Australian Distribution Networks

Cited by 13 publications

References 10 publications

Age Estimation of Transmission Line Using Statistical Health Index and Failure Probability Curve-Fitting Method

Age Estimation of Transmission Line Using Statistical Health Index and Failure Probability Curve-Fitting Method

Development of Methods for an Overhead Cable Health Index Evaluation That Considers Economic Feasibility

Analiza dejavnikov ribolovne učinkovitosti v metierjih Severnega Atlantika

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