Investigating tension in overhead high voltage power transmission line using finite element method

Ahmad, Ashfaq; Jin, Yi; Zhu, Changan; Javed, Iqra; Akram, Muhammad Waqar

doi:10.1016/j.ijepes.2019.105418

Cited by 17 publications

(12 citation statements)

References 14 publications

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“…Several studies have been carried out on different methods of uprating, including increased conductor rating, increased conductor temperature, increased thermal rating by active line rating system, probabilistic rating, high surge impedance, and increased electrical clearances [35][36][37][38][39][40][41][42][43][44]. The studies cover different techniques such as conductor replacement, conductor tension, line thermal, conductors bundling, and increased conductor attachment height [18,[45][46][47][48][49][50][51]. A number of studies have been carried out on power transfer capability through voltage uprating, which has reduced line losses and voltage drops compared to current uprating [2,32].…”

Section: Voltage Uprating Issues and Challenges In Malaysiamentioning

confidence: 99%

Issues and Challenges in Voltage Uprating for Sustainable Power Operation: A Case Study of a 132 kV Transmission Line System in Malaysia

et al. 2021

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Ageing grid infrastructure is a critical issue that is currently faced by electrical utilities worldwide, resulting in crucial decisions that must be made for the replacement, repair, or refurbishment of assets under constrained budgetary conditions, as well as other factors. As one of the fastest-developing countries globally, Malaysia is steadily growing in terms of its cumulative population, large industries, and advanced transportation sector, leading to an increasing electricity demand and, consequently, putting stress on electric utility providers to meet these tremendous demands. Significant concerns in the new development of transmission in Malaysia are the environmental issues, which involve exploration in gazetted areas and forest reserves. This paper describes the issues and challenges in developing a new transmission line system in Malaysia. In recent years, uprating existing transmission line systems has been one of the best asset management decisions for electric utility operators in order to meet such a demand for capacity. This paper assesses the technical issues and conventional methods of uprating the voltage of an existing transmission line system. The initial study found that the phase-to-Earth clearance does not fulfil the electrical clearance envelope. The study on the existing 132 kV transmission line system further analysed these issues and proposed an appropriate technique for uprating to a 275 kV transmission line system. Finally, the results indicate that the voltage uprating of the 132 kV transmission line system to 275 kV is able to satisfy the electrical clearance requirement envelope.

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Section: Voltage Uprating Issues and Challenges In Malaysiamentioning

confidence: 99%

Issues and Challenges in Voltage Uprating for Sustainable Power Operation: A Case Study of a 132 kV Transmission Line System in Malaysia

et al. 2021

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“…With prolonged high currents of transmission lines develops high tension areas in the span of the length of the transmission lines. With this, the paper of Ahmad, Y. Jin, C. Zhu, I. Javed, and M. Waqar Akram [21] aims to pinpoint the location of such high-tension zones using an analysis of these high current areas. The tension of the overhead transmission line caused by the high current was calculated using the finite element method.…”

Section: Review Of Related Literaturementioning

confidence: 99%

Frequency Response Analysis of the Parallel-plate Transmission Line using Various Conductors

2020

IJETER

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Transmission lines are special types of cables that are used to conduct alternating current (AC) voltages with frequencies in the radio wave spectrum. One such wire is the parallel-plate transmission line that is generally utilized for short and long-distance signal transmissions as it exhibits minimum power loss over the channel. Its behavior, as it transfers AC voltages, is described by its frequency response that is dependent on many parameters, relevantly its conductivity and dielectric constant. The paper aims to identify and analyze the frequency response of a parallel-plate transmission line using different kinds of conductor and insulating materials. Through the use of the RF Toolbox, specifically, in the Matlab software, the researchers were able to analyze the parallel-transmission line in the frequency domain with respect to the time domain. They were able to generate plots of its frequency response with respect to an input signal's amplitude and phase shift. The data resulting will give insight into how different materials can interact with the frequency response of the signal passing through in the transmission line.

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“…Sag determination is to obtain a safe distance of the object below the overhead conductor and to determine the conductor length and tower height [2][3][4][5]. Several studies on sag and safety distance have been undertaken [6][7][8][9][10][11]. In [6] the method of calculating sag with the effect of conductor weight, tensile strength, span distance, elevation angle between two towers, temperature and wind is presented.…”

Section: Introductionmentioning

confidence: 99%

“…The sag is measured by using a line inspection robot in [8]. In [9][10][11] the authors apply simulation or finite element modelling methods to calculate the sag or safety distance.…”

Section: Introductionmentioning

confidence: 99%

Sag‐tension evaluation of high‐temperature gap‐type conductor in operation

Bedialauneta

Fernández

Albizu

et al. 2021

IET Generation Trans & Dist

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Low-sag conductors are characterised by their ability to operate above the "knee-point temperature" (KPT). Sag-tension performance must be calculated while designing a new overhead line. The ampacity limit of the conductor is influenced by the sag and the temperature of the conductor. The maximum sag must be limited to a certain value to ensure a safe clearance between the conductor and ground. In this study, a gap-type conductor in operation was monitored to evaluate the actual KPT. The KPT in low-sag conductors is a crucial factor since it affects the sag of the conductor, which must be limited for safety reasons. The KPT was detected based on the change in the coefficient of thermal expansion value of the conductor. To perform this detection, the conductor tension and temperature were monitored. This study proposes a procedure to estimate the coefficient of thermal expansion (CTE) value. The results showed a gradual displacement in CTE. This procedure was used to perform measurements in a pilot line.

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Investigating tension in overhead high voltage power transmission line using finite element method

Cited by 17 publications

References 14 publications

Issues and Challenges in Voltage Uprating for Sustainable Power Operation: A Case Study of a 132 kV Transmission Line System in Malaysia

Issues and Challenges in Voltage Uprating for Sustainable Power Operation: A Case Study of a 132 kV Transmission Line System in Malaysia

Frequency Response Analysis of the Parallel-plate Transmission Line using Various Conductors

Sag‐tension evaluation of high‐temperature gap‐type conductor in operation

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