Optimisation of corona ring design for composite insulator strings

Aramugam, Kalaiselvi; Illias, Hazlee Azil; Ching, Yern Chee

doi:10.1108/compel-04-2018-0165

Cited by 9 publications

(4 citation statements)

References 23 publications

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“…From Figures 3-8, which provide the potential and electric field maps in both 2D and 3D representations, as well as their distribution along the creepage distance of the studied samples (one element and four elements chain), it is evident that the metal connection parts (cap and pin regions) are the critical zones where the electric field values reach the highest level. This finding is strongly supported by several studies that consider other types and profiles of high-voltage insulators (Kalaiselvi et al, 2018;Doufene et al, 2017bDoufene et al, , 2017aDoufene et al, , 2019Doufene et al, , 2020Doufene et al, , 2022Doufene et al, , 2023.…”

Section: Detection Of the Critical Zonessupporting

confidence: 77%

A new approach for the flashover voltage prediction using an arc propagation reproduction on a high-voltage insulator

Doufene,

Benharat,

Essmine

et al. 2024

COMPEL

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Purpose This paper aims to introduce a new numerical model that predicts the flashover voltage (FOV) value in the presence of polluted air surrounding a high-voltage insulator. The model focuses on simulating the propagation of arcs and aims to improve the accuracy and reliability of FOV predictions under these specific conditions. Design/methodology/approach This arc propagation method connecting the high voltage fitting and the grounded insulator cap involves a two-step process. First, the electric field distribution in the vicinity of the insulator is obtained using finite element method analysis software. Subsequently, critical areas with intense electric field strength are identified. Random points within these critical areas are then selected as initial points for simulating the growth of electric arcs. Findings by increasing the electric voltage applied to the insulator fittings, the arc path is, step by step, generated until a breakdown occurs on the polluted air surrounding the insulator surface, and thus a prediction of the FOV value. Practical implications The proposed model for the FOV prediction can be a very interesting alternative to dangerous and costly experimental tests requiring an investment in time and materials. Originality/value Some works were done trying to reproduce discharge propagation but it was always with simplified models such as propagation in one direction from a point to a plane. The difficulty and the originality of the present work is the geometry complexity of the insulator with arc propagation in three distinct directions that will require several proliferation conditions.

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Section: Detection Of the Critical Zonessupporting

confidence: 77%

A new approach for the flashover voltage prediction using an arc propagation reproduction on a high-voltage insulator

Doufene,

Benharat,

Essmine

et al. 2024

COMPEL

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show abstract

“…However, the electric field dependency to insulator material and profile is decreased as the distance from insulator string increases, as stated in a former finding (Akbari et al, 2012). As stated earlier, this study was focusing on the effect of broken insulator in string; therefore it is important to note that the design only aims to simulate voltage and electric field distribution without considering the applicable of corona ring (Aramugam et al, 2018).…”

Section: Voltage Distribution Effects In the Presence Of Broken Insulator In The Stringsmentioning

confidence: 87%

Effects of external shed damage on voltage and electric field profile for overhead insulators

Rosli

Othman

Jamail

et al. 2019

WJE

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Purpose This paper aims to present simulation studies on voltage and electric field characteristics for imperfect ceramic insulators using QuickFieldTM software. Based on previous studies, it is accepted that string insulator can still serve the transmission line although imperfect of certain insulator exist in a string. However, different materials of porcelain and glass type had made these insulators own different abilities to carry electricity to be transferred to the consumers. Design/methodology/approach Cap and pin type of porcelain and glass insulators are used as the main subject for comparison. The simulation works begins with modeling a single insulator, followed by string of ten insulators with their respective applied voltage, that is, 11 and 132 kV. The insulator was modeled in alternate current conduction analysis problem type using QuickField Professional Software. Technical parameters for porcelain and glass insulator were manually inserted in the modeling. Findings This paper presents an investigation on the influence of broken porcelain and glass insulators in string for voltage and electric field characteristics. For single insulator, the voltage distribution may literally reduce when experiencing external damages; whereby the broken porcelain insulator condition is worse than the glass insulator. In terms of electric field distribution, the glass insulator is badly affected compared with the porcelain insulator, as it is pulverized comprehensively. Research limitations/implications Further work needs to be done to establish whether the experiments of these simulations study will present coequal outcomes. This study endeavors in promoting a good example of voltage and electric field characteristics across high voltage (HV) insulator with the presence of broken insulator in the string. Practical implications This study is beneficial to future researchers and manufacturing companies in strategic management and research planning when they involve in the field of HV insulators. It will also serve as a future reference for academic and study purposes. This research will also educate many people on how HV insulators work. Social implications This study will be helpful to the industry and business practitioners in training for the additional results and knowledge to be updated in the area of HV insulators. Originality/value This paper presents the analysis of porcelain and glass insulators according to their respective logic conditions when broken. Consequently, the existence of a damage insulator in a string may alter the distribution of voltage and electric field which may ultimately lead to the insulation breakdown after some time. This is because the broken insulator may cause other insulators to withstand the remaining voltage allocated for that particular insulator and may affect the insulators in terms of the life span. Therefore, the distribution of voltage and electrical field characteristics in the presence of broken insulators had been studied in this project.

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“…In many substations, the insulators, bushings, and lightning arresters have typically been built with porcelain housings. Several research projects on high voltage insulators have been described by different scholars [2] , [3] , [4] , [5] . Comparing porcelain bushing to polymeric bushings, porcelain bushing offers greater self-cleaning qualities.…”

Section: Introductionmentioning

confidence: 99%

A mathematical model for investigation of dry band location on 22 kV bushing with and without RTV coating: Experimental study

Kalaivani,

Maheswari,

Makki

et al. 2024

MethodsX

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Optimisation of corona ring design for composite insulator strings

Cited by 9 publications

References 23 publications

A new approach for the flashover voltage prediction using an arc propagation reproduction on a high-voltage insulator

A new approach for the flashover voltage prediction using an arc propagation reproduction on a high-voltage insulator

Effects of external shed damage on voltage and electric field profile for overhead insulators

A mathematical model for investigation of dry band location on 22 kV bushing with and without RTV coating: Experimental study

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