A photogrammetric solution for measurement of power lines sag via integration of image and accelerometer data of a smartphone

Safdarinezhad, Alireza; Abdollahifard, Mohammad Javad; Ganjali, Atiyeh

doi:10.1016/j.measurement.2022.111493

Cited by 3 publications

(1 citation statement)

References 21 publications

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“…One is the selection of measuring points, and the other is the change in the position of measuring points caused by long-term sensor sliding on the conductor. The second type of method is through image acquisition, which calculates the sag value by analyzing the obtained photos or videos [11,12]. The drawback of this type of method is that the angle at which the photo is taken is very important.…”

Section: Introductionmentioning

confidence: 99%

Calculation Methods of High-Voltage Direct Current (HVDC) Line Sag Considering Meteorology

Li,

Xie,

Zeng

et al. 2024

Energies

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Sag is one of the important indicators for judging whether a transmission line is safe. The existing sag calculation method does not consider the temperature difference between conductor strands, causing the calculated results to often deviate from the values measured with a theodolite. In this article, a sag calculation method considering the temperature difference between strands is proposed. First, finite element analysis and experiments were used to analyze the temperature differences between each area and layer of the conductor when the wind blew the conductor, and then a correction calculation model for the conductor sag was proposed. Next, a sag monitoring system based on four-point temperature measurement was designed. Finally, the method was applied to a ±400 kV transmission line in Qinghai Province, China. The results show that after considering the temperature difference in the conductor strands, the error of the sag calculation result is much smaller than that without considering the temperature difference in the conductor strands, and the maximum relative error is reduced from 7.86% to less than 2%.

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Section: Introductionmentioning

confidence: 99%

Calculation Methods of High-Voltage Direct Current (HVDC) Line Sag Considering Meteorology

Li,

Xie,

Zeng

et al. 2024

Energies

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show abstract

Sag Measurement Method of Wind-Induced Vibration for Uniced Overhead Power Line via Laser Rangefinder and Angle Monitoring

Zhang,

Fang,

Zhou

et al. 2024

IEEE Trans. Instrum. Meas.

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A Novel Monocular Vision Technique for the Detection of Electric Transmission Tower Tilting Trend

Yang

Wang

et al. 2022

Applied Sciences

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Transmission lines are primarily deployed overhead, and the transmission tower, acting as the fulcrum, can be affected by the unbalanced force of the wire and extreme weather, resulting in the transmission tower tilt, deformation, or collapse. This can jeopardize the safe operation of the power grid and even cause widespread failures, resulting in significant economic losses. Given the limitations of current tower tilt detection methods, this paper proposes a tower tilt detection and analysis method based on monocular vision images. The monocular camera collects the profile and contour features of the tower, and the tower tilt model is combined to realize the calculation and analysis of the tower tilt. Through this improved monocular visual monitoring method, the perception accuracy of the tower tilt is improved by 7.5%, and the axial eccentricity is accurate to ±2 mm. The method provides real-time reliability and simple operation for detecting tower inclination, significantly reducing staff inspection intensity and ensuring the power system operates safely and efficiently.

show abstract

A photogrammetric solution for measurement of power lines sag via integration of image and accelerometer data of a smartphone

Cited by 3 publications

References 21 publications

Calculation Methods of High-Voltage Direct Current (HVDC) Line Sag Considering Meteorology

Calculation Methods of High-Voltage Direct Current (HVDC) Line Sag Considering Meteorology

Sag Measurement Method of Wind-Induced Vibration for Uniced Overhead Power Line via Laser Rangefinder and Angle Monitoring

A Novel Monocular Vision Technique for the Detection of Electric Transmission Tower Tilting Trend

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