Transmission line sag influence on lightning stroke probability

Alush, S.; Braunstein, A.; Elmakias, David

doi:10.1049/iet-gtd.2011.0501

Cited by 3 publications

(3 citation statements)

References 14 publications

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“…Sag is influenced by the inclination angle, which varies with the tension. The tension of the line decreases with increase in the line sag [4, 40]. Authors of [11] proposed a sensor that can effectively measure tension of transmission line.…”

Section: Sag Measurement Techniquesmentioning

confidence: 99%

Measurement and monitoring of overhead transmission line sag in smart grid: A review

Mahin

Islam

Ahmed

et al. 2021

IET Generation Trans & Dist

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In a transmission line, sag is intentionally provided to relax the tension on the wire when placed between two terminals. However, thermal stress and extreme weather conditions can cause increases in transmission line sag, which can eventually damage transmission line infrastructure. In this regard, this paper examines a number of sag measurement techniques based on physical or optical properties and integrated with signal processing and communication technologies. The performance of different sag measurement methods is compared in terms of accuracy, precision and key feature. Several challenges and limitations of the existing sag measurement mechanisms are reported. A number of recommendations to address the identified challenges are made. Moreover, an efficient communication framework for sag related information exchange is proposed. This comprehensive review of the sag measurement techniques will facilitate the evolution of new and efficient real-time sag measurement and monitoring methods.

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Section: Sag Measurement Techniquesmentioning

confidence: 99%

Measurement and monitoring of overhead transmission line sag in smart grid: A review

Mahin

Islam

Ahmed

et al. 2021

IET Generation Trans & Dist

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“…The sag for one line of multi-conductor transmission lines above lossy ground is shown in Fig. 1 [17]. The sag height difference h 0 ðxÞ with respect to the point x can be calculated as:…”

Section: Sag Calculatedmentioning

confidence: 99%

“…The overhead transmission lines are considered as the straight lines in these papers [10,11,12,13,14,15,16]. Actually, the line is not straight and does not parallel to the ground level due to the sag produced by the weight of the line, etc [17,18,19,20,21,22]. To obtain actual responses of nonlinear terminations for the transmission lines sag above lossy ground, it imperatively need to build the equivalent circuits of transmission lines sag.…”

Section: Introductionmentioning

confidence: 99%

Equivalent circuits of transmission lines sag above lossy ground excited by external electromagnetic fields

Yang

Zhou

Yao

et al. 2019

IEICE Electron. Express

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To obtain actual responses of nonlinear terminations for the transmission lines sag above lossy ground, it imperatively need to build the equivalent circuits of transmission lines sag. In this paper, the multiconductor transmission lines sag above lossy ground are divided into a sequence of smaller segments, each of which is approximate equal height. Equivalent circuit of the transmission lines sag is composed of each segment in series. And the simplified equivalent circuit of transmission lines sag above lossy ground excited by the external electromagnetic fields is built by combined the neighboring elements. The proposed method is compared with the result obtained by the FDTD method, a good agreement is observed. And the amplitude of the response is less than the results when the transmission lines are considered as the straight lines.

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Millimeter Wave Based Sag Measurement Using Parabolic Approximation for Smart Grid Overhead Transmission Line Monitoring

Mahin

Islam

Hossain

2019

2019 IEEE International Conference on Communications, Control, and Computing Technologies for Smart Grids (SmartGridComm)

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Transmission line sag influence on lightning stroke probability

Cited by 3 publications

References 14 publications

Measurement and monitoring of overhead transmission line sag in smart grid: A review

Measurement and monitoring of overhead transmission line sag in smart grid: A review

Equivalent circuits of transmission lines sag above lossy ground excited by external electromagnetic fields

Millimeter Wave Based Sag Measurement Using Parabolic Approximation for Smart Grid Overhead Transmission Line Monitoring

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