Pollution Flashover Under Different Contamination Profiles on High Voltage Insulator: Numerical and Experiment Investigation

Salem, Ali Ahmed; Rahman, Rahisham Abd; Rahiman, Wan; Al-Gailani, Samir A.; Al-Ameri, Salem Mgammal; Ishak, Mohd Taufiq; Sheikh, Usman Ullah

doi:10.1109/access.2021.3063201

Cited by 46 publications

(25 citation statements)

References 30 publications

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“…After that, the insulator samples were naturally dried for 1 day. The pollutants were deposited on the surface of the insulator using the solid layer technique [30][31][32][33]. The sodium chloride salt (NaCl) was used as Soluble Deposit Density (SDD) and the kaolin represents the Non-Soluble Deposit Density (NSDD).…”

Section: Pollution and Wetting Processmentioning

confidence: 99%

Polymeric Insulator Conditions Estimation by Using Leakage Current Characteristics Based on Simulation and Experimental Investigation

et al. 2022

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The current work contributes an estimate of the time-frequency characteristics of a leakage current in assessing the health condition of a polluted polymeric insulator. A 33 kV polymer insulator string was subjected to a series of laboratory tests under a range of environmental conditions, including pollution, wetting rate (WR), non-soluble deposit density (NSDD), and non-uniform distribution pollution (FT/B). The temporal and frequency features of the leakage current were then extracted and used as assessment indicators for insulator conditions based on laboratory test findings. Two indices were generated from the leakage current waveform in the time domain: the curve slope index (F1), which is determined by measuring the inclination of the curve between two successive time peaks of the leakage current, and the crest factor indicator (F2). The frequency domain of the leakage current signal was used to calculate the other two indices. These are the odd harmonic indicators derived from the odd frequency harmonics of the leakage current up to the 9th component (F3) and the 5th to 3rd harmonics ratio (F4). The findings showed that the suggested indicators were capable of evaluating insulator conditions. Finally, the confusion matrix for the experimental and prediction results obtained with the proposed indices was used to assess which indicator performed the best. Therefore, the analysis suggests an alternative and effective method for estimating the health condition of a polluted insulator through leakage current characteristics obtained in the time and frequency domains.

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Section: Pollution and Wetting Processmentioning

confidence: 99%

Polymeric Insulator Conditions Estimation by Using Leakage Current Characteristics Based on Simulation and Experimental Investigation

et al. 2022

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“…Senyawa garam pada larutan pengotor isolator akan larut kedalam pelarut polar H 2 O yang berasal dari kabut (uap) air dan membentuk larutan elektrolit. Konduktivitas larutan elektrolit ini akan semakin tinggi bersamaan dengan naiknya ESDD larutan polutan [5]. Arus bocor yang mengalir mengakibatkan panas dan penguapan pada bagian permukaan isolator sehingga terbentuk pita kering.…”

Section: Arus Bocor Pada Permukaan Isolatorunclassified

Analisis Pengaruh Polutan NaCl Pada Isolator Keramik Tipe Post Pin

BASO

2021

ELEKTERIKA

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Penelitian yang tertuang dalam makalah ini merupakan hasil dari serangkaian pengujian isolator tipe Post Pin yang diberikan larutan polutan NaCl (garam). Pengujian ini dilakukan untuk mengetahui sejauh mana pengaruh konsentrasi Equivalent Salt Deposit Density ( ESDD ) yang terkandung dalam larutan polutan NaCl (garam) terhadap flashover dan sudut kontak permukaan pada isolator Post Pin. Berdasarkan hasil penelitian dilakukan dengan menyemprotkan larutan NaCl dengan konsentrasi sebanyak 10 gr, 20 gr, 30 gr, 40 gr, dan 50 gr untuk setiap isolator. Pada setiap konsentrasi NaCl, penyemprotan diberikan sebanyak 6 kali dengan selang waktu ± 15 menit. Setelah dilapisi polutan, isolator didiamkan selama 24 jam dan kemudian diuji untuk mendapatkan nilai tegangan flashover. Hasil penelitian menunjukkan bahwa semakin tinggi konsentrasi ESDD maka tegangan flashover yang terjadi pada isolator semakin menurun. Dan semakin besar konsentrasi ESDD maka nilai sudut kontak pada permukaan isolator keramik tipe Post Pin semakin kecil.

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“…According to Ghiasi et al. [32], the use of FEM to assess the level of contamination is promising, due to the possibility of variation in the profile, materials in simulation [33].…”

Section: Introductionmentioning

confidence: 99%

Optimal design of electrical power distribution grid spacers using finite element method

Stefenon

Seman

Ovejero

et al. 2022

IET Generation Trans & Dist

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Spacers in the compact power distribution network are essential components for the support, organization, and spacing of conductors. To improve the reliability of these components and have an optimized network design, it is necessary to evaluate the performance of the variation of their geometric parameters. The analysis of these components is fundamental, considering that there are several models available that are validated by the electric power utilities. Due to the various possible design shapes, it is necessary to use an optimized model to reduce the electric potential located in specific sites, improving the reliability in the component, as the higher electrical potential results in a greater chance of failure to occur. The finite element method (FEM) stands out for evaluating the distribution of electrical potential. In this paper, an FEM is used to evaluate variations in vertical and horizontal dimensions in spacers used in the 13.8 kV power grid. The models are analyzed in relation to their behavior regarding the potential distribution on their surface. From the results of these variations, the model is optimized by means of a mixed-integer linear problem (MILP), replacing the FEM output with a ReLU network substitute model, to obtain a spacer with more efficiency to be used in semi-insulated distribution networks.

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Pollution Flashover Under Different Contamination Profiles on High Voltage Insulator: Numerical and Experiment Investigation

Cited by 46 publications

References 30 publications

Polymeric Insulator Conditions Estimation by Using Leakage Current Characteristics Based on Simulation and Experimental Investigation

Polymeric Insulator Conditions Estimation by Using Leakage Current Characteristics Based on Simulation and Experimental Investigation

Analisis Pengaruh Polutan NaCl Pada Isolator Keramik Tipe Post Pin

Optimal design of electrical power distribution grid spacers using finite element method

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