Performance analysis of silicone rubber insulator in DC high-voltage inclined plane tracking test

Biswas, Prasenjit; Veena, M. G.

doi:10.1007/s00202-019-00854-1

Cited by 7 publications

(2 citation statements)

References 28 publications

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“…One of the most critical issues with power transmission is flashover caused by conductive contaminants on high-voltage insulators. The accumulated contaminants on the insulator surface may cause dry band arc discharges and lead to the formation of tracking and erosion [2]. The inclusion of high thermal conductive fillers such as boron nitride (BN) [3], ATH [4], alumina (Al2O3) [5], or alumina nitride (AlN) [6,7] in silicone rubber matrix leads to reduce the local hot spot by increasing the thermal conductivity of the overall polymer matrix and thus higher resistance to erosion could be achieved [8,9].…”

Section: Introductionmentioning

confidence: 99%

Enhanced mechanical, thermal, and erosion resistance properties via the synergetic effect of n-ATH/LMGP added ceramifiable silicone rubber composites for electrical insulation

Kornhuber,

Sarathi

2023

Preprint

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The present work is focused on investigating the mechanical, thermal, and electrical erosion resistance properties of newly developed silicone rubber composites with micro-size-low melting glass powder (LMGP) and nano-size alumina trihydride (n-ATH). Utilizing the fluorescent fiber, a new erosion testing method has been developed. The intensity of the signal generated from the fluorescent fiber explains the severity of damage caused by electrical inception followed by arcing and erosion. LMGP filler exhibits good thermal stability, arc resistance, and flame-retardant properties by forming a ceramic structure between ATH and silicone rubber matrix. With ATH/LMGP-filled hybrid samples, the formation of fire cinders is observed rather than flame formation in virgin silicone rubber samples at the time of erosion. Very little temperature rise is observed at the time of erosion with the LMGP-added samples. Compared to virgin material, the hybrid composite material shows a mechanical improvement of 13.03% in tensile strength and 12.47% in tear strength. The synergetic effect of the ATH and LMGP fillers enhances the thermal conductivity of the silicone rubber matrix by 59.34%. FEM studies revealed the basic understanding of the local hotspot reduction with the addition of high thermal conductive fillers and its effect on erosion resistance.

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Section: Introductionmentioning

confidence: 99%

Enhanced mechanical, thermal, and erosion resistance properties via the synergetic effect of n-ATH/LMGP added ceramifiable silicone rubber composites for electrical insulation

Kornhuber,

Sarathi

2023

Preprint

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“…Composite insulators are increasingly used in the transmission lines, especially the DC transmission grids, due to its light weight and excellent anti-pollution performance [1][2][3]. In China, the number of composite insulators has approached that of traditional ceramic or glass insulators, and they are becoming the key out-door insulation equipment for transmission projects.…”

Section: Introductionmentioning

confidence: 99%

Failure Analysis of “Lantern-Like” Composite Insulator Heating Defects and the Improved Dye Penetration Test Method

Huang

Wang

et al. 2021

IEEE Access

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In 2019, 27 new 500 kV AC composite insulators showed a severe heating, different from the traditional heating failure reported in recent years, the heating area isn't limited in the high voltage side and 3-5 discontinuous heating area appears in the middle part. It was named "Lantern-like" heating failure according to the shape of the heating area. With the withstand voltage test, absorption test, X ray micro-CT test and SEM analysis, The 3D structural imaging of the through channels in the rod has been achieved, which would change the electric field distribution significantly. Short internal through channels will change the electrical field distribution and provide the energy to the abnormally heating. To detect these potential channels which should be responsible for the abnormally heating in the rod, the test time of dye penetration test has been extended from 15 minutes to 2 hours, and the improved test methods can find the through channels easily but won't alert for the normal ones.

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Evaluation of Long-Term Boiling Water Immersion as Artificial Aging Test of Silicone Rubber Insulators

Akbari

Akmal

2023

Silicon

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Our country IRAN have long coastal area with length of more than 1830 km. Utility companies with 30 years of experience in using polymeric insulators in this very heavy polluted area. Operational history in these areas indicates many insulating problems. With the advancement of polymer insulation technology, the utilities want to select the longest life insulators for these areas.Laboratory studies accelerated testing of polymer insulators is the only available method to investigate the trend of insulator degradation during the aging process, because it takes a long time for noticeable changes and signs of aging to appear on insulators in the power grid.Different methods such as salt-fog, UV and boiling water are used to test arti cial aging, each method has advantages and disadvantages. In our experience, boiling water is used as a low-cost method in compared to the other methods especially salt fog test. The aim of this research was to determine a shorter method for evaluation of SR insulators.In this paper, the accelerated aging of polymer insulators using salt-fog and boiling water immersion tests are investigated. During and after the aging test, the polymer insulator's electrical quality is analysed using leakage current measurement tools, partial discharge, and hydrophobicity. Surface changes are also analysed by Scanning Electron Microscopy (SEM), Energy Dispersive X-ray spectroscopy (EDX), Thermo Gravimetrical Analysis (TGA), and Fourier Transform Infrared Spectroscopy (FTIR) both qualitatively and quantitatively.

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Performance analysis of silicone rubber insulator in DC high-voltage inclined plane tracking test

Cited by 7 publications

References 28 publications

Enhanced mechanical, thermal, and erosion resistance properties via the synergetic effect of n-ATH/LMGP added ceramifiable silicone rubber composites for electrical insulation

Enhanced mechanical, thermal, and erosion resistance properties via the synergetic effect of n-ATH/LMGP added ceramifiable silicone rubber composites for electrical insulation

Failure Analysis of “Lantern-Like” Composite Insulator Heating Defects and the Improved Dye Penetration Test Method

Evaluation of Long-Term Boiling Water Immersion as Artificial Aging Test of Silicone Rubber Insulators

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