Accelerated Aging Study on Silicone Rubber Insulator with Contaminant Level and Fog Conductivity Variations

Haya, Shafa Nabilla; Jaelani, Adib Akbar; Lumba, Lunnetta Safura; Suwarno, &

doi:10.1109/ichveps53178.2021.9601100

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…Contamination increases the leakage current, as well as the aging process. We confirm this fact in our experimental study [ 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ]. However, the changes in the leakage current, comparing results at different pollution levels, are not so significant.…”

Section: Discussionsupporting

confidence: 87%

“…The method of pre-contamination helps to investigate the dry pollution layer and hydrophobicity. By gradually increasing the humidity, it is possible to track how the leakage current increases and identify the critical humidity level, which is the point from which it increases drastically [ 16 , 17 , 18 , 19 ]. Research is also devoted to other types of pollution and different additives that can be used instead of salt and kaolin [ 20 , 21 , 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

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Sensing Method Using Dielectric Loss Factor to Evaluate Surface Conditions on Polluted Porcelain Insulator

Šárpataky

Dolník

Zbojovský

et al. 2022

Sensors

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Insulator diagnostics is still a topical issue. No one has yet found out how to accurately determine the condition of all insulators and decide when replacement or maintenance is required. Insulators are one of the main components of a transmission and distribution system and must withstand high voltages in all weather conditions. Moisture and dirt are the main factors influencing the insulating properties of insulators. This article deals with the effect of pollution on a porcelain insulator. An Omicron MI 600 measuring system monitors the changes in the dielectric loss factor and leakage current in a wide frequency range (10 Hz to 1 kHz) to evaluate the contamination level. We applied three high voltage levels (5 kV, 7.5 kV, and 10 kV) to the porcelain insulator to monitor changes in the mentioned quantities with various frequencies. The measurement results confirmed the usability of the dielectric loss factor and leakage current for the diagnosis of insulator pollution. The dielectric loss factor showed more promising results than the leakage current.

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Section: Discussionsupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Sensing Method Using Dielectric Loss Factor to Evaluate Surface Conditions on Polluted Porcelain Insulator

Šárpataky

Dolník

Zbojovský

et al. 2022

Sensors

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Intensification of Electric Field Stresses in Field Aged 380-kV Composite Insulators Due to Loss of Hydrophobicity

Asif,

Al-Soufi,

Khan

et al. 2024

IEEE Access

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Polymer based composite high voltage insulators (HVIs) due to their hydrophobic surfaces have consistently outperformed the traditional ceramic insulators in highly contaminating coastal-desert environments. However, the harsh environment causes polymer surfaces of these HVIs undergo rapid ageing leading to permanent loss of hydrophobicity. In this paper, we have presented three samples of 380 kV composite HVIs with a service life of over ten years near west coast of the Kingdom of Saudi Arabia. Material investigation using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy revealed substantial surface deterioration and change in the composition. Hydrophobicity investigations revealed that surface of the HVIs have become hydrophilic leading to accumulation of continuous films of water. Electrical withstand strength was evaluated using steam fog test showing significant decrease from the rated values. The distribution of electric field around an insulator is a key design criterion for HVIs. The consequences of loss of hydrophobicity on the electric field distribution across insulator surface is explained analytically and through numerical simulations based on Finite Element Method (FEM). The pristine and field aged HVIs are modelled and were covered with realistic water distributions observed during hydrophobicity tests. It has been observed that the intensity of electric field on field aged insulator surpasses the corona inception threshold at certain areas of the insulator, resulting in the initiation of corona discharge on the insulator's surface. This corona inception further causes surface deterioration and accelerated ageing in composite HVI.

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A Dynamic Intelligent Approach Based on Gaussian Function for Prediction of the Flashover Voltage Conditions on Polluted Polymer Insulators

Sezavar

Fahimi

Akmal

2022

IEEE Trans. Power Delivery

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Accelerated Aging Study on Silicone Rubber Insulator with Contaminant Level and Fog Conductivity Variations

Cited by 3 publications

References 12 publications

Sensing Method Using Dielectric Loss Factor to Evaluate Surface Conditions on Polluted Porcelain Insulator

Sensing Method Using Dielectric Loss Factor to Evaluate Surface Conditions on Polluted Porcelain Insulator

Intensification of Electric Field Stresses in Field Aged 380-kV Composite Insulators Due to Loss of Hydrophobicity

A Dynamic Intelligent Approach Based on Gaussian Function for Prediction of the Flashover Voltage Conditions on Polluted Polymer Insulators

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