Lightning Flashover Characteristics of a Full-Scale AC 500 kV Transmission Tower with Composite Cross Arms

Wang, Qian; Liang, Xidong; Shen, Yufeng; Liu, Shuming; Zuo, Zhou; Gao, Yanfeng

doi:10.1016/j.eng.2021.09.021

Cited by 7 publications

(3 citation statements)

References 21 publications

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“…Tegangan flashover merupakan kegagalan isolasi di mana permukaan isolator dibebani oleh medan listrik yang lebih besar daripada kapasitas ketahanan elektriknya. Flashover ini dapat menimbulkan pemanasan dan merusak isolator, dan salah satu penyebabnya adalah pencemaran pada permukaan isolator, yang mekanismenya dipengaruhi oleh beberapa variabel dinamis seperti konfigurasi insulasi, polusi dan iklim [11], [12], [13].…”

Section: Flasover Pada Isolatorunclassified

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Implementasi Jaringan Syaraf Tiruan - Backpropagation dalam Pengenalan Flashover Isolator 150 kV

Kamil,

Amalia,

Warmi

et al. 2023

ECT

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Saluran transmisi 150 kV Koto Panjang - Payakumbuh di Sumatera Barat, digunakan untuk sistem distribusi tenaga listrik. Saluran transmisi 150 kV Koto Panjang - Payakumbuh ini merupakan saluran transmisi dengan total panjang 86 km. Faktor lingkungan sangat berpengaruh terhadap pembentukan lapisan kontaminan pada permukaan isolator, hal tersebut merupakan salah satu penyebab terjadinya flashover pada isolator. Penelitian ini dilakukan dengan menggunakan metode jaringan syaraf tiruan – backpropagation dalam pengenalan flashover isolator 150 kV terhadap suhu dan kelembaban yang terkontaminasi lumut dan berdebu. Sehingga hasil flashover yang diperoleh menggunakan jaringan syaraf tiruan - backpropagation dibandingkan dengan flashover eksperimen. Oleh sebab itu Implementasi jaringan syaraf tiruan – backpropagation untuk pengenalan flashover isolator 150 kV payakumbuh – Koto Panjang berhasil diterapkan dengan capaian nilai flashover dengan outputnya mendapatkan selisih yang kecil sehingga error yang diperoleh oleh pelatihan dan pengujian jaringan syaraf tiruan juga kecil. Artinya tegangan flashover tersebut dapat dikenali oleh pengujian jaringan syaraf tiruan. Dengan nilai parameter diukur dari jumlah epoch, performance dan gradien dengan hasil terbaik.

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Section: Flasover Pada Isolatorunclassified

“…Jumlah elektron yang ditangkap oleh molekul air meningkat seiring dengan jumlah jalur bebas rata-rata elektron. Karena itu, peningkatan kelembaban relatif mengubah kinerja sistem isolasi.Seperti kelembaban, kepadatan udara sangat mempengaruhi karakteristik flashover [11], [14], [12], [15].…”

Section: Kerapatan Udara Kelembaban Dan Suhu Udaraunclassified

Implementasi Jaringan Syaraf Tiruan - Backpropagation dalam Pengenalan Flashover Isolator 150 kV

Kamil,

Amalia,

Warmi

et al. 2023

ECT

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“…Overhead transmission lines have been, are, and are still likely to be the major approach to electric power delivery over long distances due to their large transmission capacities and low construction costs [ 1 , 2 ]. Insulators, which are an essential part of transmission towers, play a vital role, considering that they simultaneously assure both electrical and mechanical reliability [ 3 , 4 ]. In recent years, composite insulators (or polymeric insulators) have become more and more popular in comparison with traditional porcelain and glass insulators due to their excellent hydrophobicity, low weight, and convenience of maintenance [ 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Surface Discharge on Resin Degradation in Decay-like Fracture of Composite Insulators

Wang

Bao²,

Gao³

et al. 2023

Polymers

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Composite insulators have gradually become the preferred approach for electrical insulation in power systems, especially in polluted areas. Composite insulators consist of three main components: the shed, rod, and end fitting. Insulators withstand mechanical stresses via rods that are composed of glass-fiber-reinforced epoxy (GFRE). However, regardless of the high tensile strength of GFRE rods, in real-life operation, abnormal fractures have frequently been reported all over the world, which substantially increase the risk of major accidents in power systems. Fractural accidents mainly consist of brittle and decay-like fractures, which exhibit rather different morphologies at the cross sections. Brittle fracture has been effectively eliminated, while the mechanism of decay-like fracture has still not been clearly revealed. In this study, surface discharge tests were applied to investigate the discharge influence on the degradation of GFRE. The test successfully simulated the composition variation of the rods in real-life composite insulators with decay-like fractures. Moreover, it confirmed that the distinction between the characteristics of brittle fracture and decay-like fracture stems from epoxy degradation due to hydrolysis and carbonization. In addition, the respective influences of the resin type, glass fiber type, and acid liquid immersion on the degradation process were probed, and the degradation mechanism proposed in this research was verified. Based on the results, measures for preventing the development of decay-like fractures in real-life operations were determined.

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Breakdown mechanism of RTV silicone rubber coated insulators under steep-front impulse voltage

Deng,

Wang,

Liu

et al. 2023

Electric Power Systems Research

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Lightning Flashover Characteristics of a Full-Scale AC 500 kV Transmission Tower with Composite Cross Arms

Cited by 7 publications

References 21 publications

Implementasi Jaringan Syaraf Tiruan - Backpropagation dalam Pengenalan Flashover Isolator 150 kV

Implementasi Jaringan Syaraf Tiruan - Backpropagation dalam Pengenalan Flashover Isolator 150 kV

Influence of Surface Discharge on Resin Degradation in Decay-like Fracture of Composite Insulators

Breakdown mechanism of RTV silicone rubber coated insulators under steep-front impulse voltage

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