Analysis of Current Ways of Determining the State of Overhead Power Lines According to the Mechanical Parameters of Wires: A Review

Sadykov, M. F.; Yaroslavsky, D. A.; Goryachev, M. P.; Nguyen, Van Vu; Andreev, N. K.; Иванов, Д. А.

doi:10.3103/s1062873821110320

Cited by 2 publications

(1 citation statement)

References 2 publications

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“…В последние годы широкое распространение получили различные методы диагностики электрической части воздушных ЛЭП -проводов, контактных соединений и изоляции [13,14]. Но для диагностики механической части ЛЭП -опор, стоек под оборудование и фундаментов, единственным широко распространенным способом остаются внешние осмотры, регламентируемые правилами эксплуатации электроустановок [15].…”

Section: Introductionunclassified

Vibration sensor for monitoring systems of construction elements of high-voltage power lines

Bryakin

Bochkarev

2022

«Izvestiya vysshikh uchebnykh zavedenii. PROBLEMY ENERGETIKI»

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PURPOSE. To develop a differential parametric inductive transducer of vibration values into an electrical signal, which is a vibration displacement sensor (DV) with a new principle of operation. Theoretically substantiate the performance of the proposed DV. To develop a new system for vibroacoustic monitoring of the technical condition of overhead power transmission line (TL) supports using the proposed DV. METHODS. When solving this goal, the theory of parametric transducers and the main provisions of the theory of vibration diagnostics were used. RESULTS. The design feature of the developed DV is the absence of an excitation coil, and its functional elements form a full-fledged measuring bridge, the arms of which include interturn capacitances of the windings of the first and second measuring coils, as well as capacitances formed by a metal cylindrical electrode with a coaxially located inside it ferromagnetic rod and the first lower rows of wire windings of the measuring coils. The bridge circuit operates in a resonant mode, which ensures the high sensitivity of the proposed sensor, and the quadrature conversion of the information signal provides the necessary level of noise immunity. The received signal is a functional dependence of the output voltage of the measuring bridge on the magnitude of external vibrations, the characteristics of the temporary realizations of which reflect the degradation processes occurring in the power transmission line supports. CONCLUSION. The proposed system for monitoring the integrity of power transmission line supports is actually a distributed real-time sensor network that implements PLC technology. The DV of each sensor module registers microvibrations of the structural elements of the corresponding power transmission line support, caused by natural disturbing factors during their operation, and converts them into an electrical information signal, which forms the basis of monitoring information about the current state of the power transmission line support structural elements.

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Section: Introductionunclassified

Vibration sensor for monitoring systems of construction elements of high-voltage power lines

Bryakin

Bochkarev

2022

«Izvestiya vysshikh uchebnykh zavedenii. PROBLEMY ENERGETIKI»

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Methodology Approbation for the Overhead Power Lines Sag Determining by the Period of Conductor Owned Oscillations

et al. 2022

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The relevance of the problem is justified and the review of existing methods for determining the overhead line sag by the period of the conductor owned oscillations is conducted. The method of controlling the sag by the period of its own oscillations is briefly presented. The experimental installation for conducting full-scale tests is described, which includes the conductor (64 m), rigid fasteners at the points of conductor suspension, accelerometer, and temperature sensor mounted on the conductor, data from which are processed and recorded by the specialized software. The measurement method is explained with a detailed description. The conductor oscillations spectral analysis is performed. The results of experimental main harmonic frequency measurements, conductor, and changes in the sag are presented. A comparative results analysis showed the efficiency of the proposed method. The described method for determining the sag is easy to use (it is enough to install an accelerometer on the conductor and process data from it) and can be recommended for monitoring the condition of overhead power lines. The correlation of changes in the conductor oscillations spectral harmonics amplitude with temperature was studied. It is found that the correlation coefficient initially increases with the growth of the harmonics number. It is maximal for the ninth harmonic R = −0.9, and then slowly weakens, remaining between 0.9 and 0.8. This property of high-frequency harmonic oscillations can be used in the high-voltage lines condition diagnosis.

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Analysis of Current Ways of Determining the State of Overhead Power Lines According to the Mechanical Parameters of Wires: A Review

Cited by 2 publications

References 2 publications

Vibration sensor for monitoring systems of construction elements of high-voltage power lines

Vibration sensor for monitoring systems of construction elements of high-voltage power lines

Methodology Approbation for the Overhead Power Lines Sag Determining by the Period of Conductor Owned Oscillations

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