Characterization of field-aged 400 kV silicone rubber composite insulators

Xiong, Y.; Rowland, S. M.; Robertson, J.A.L.; Hoffmann, Susanne

doi:10.1109/ceidp.2006.311958

Cited by 7 publications

(3 citation statements)

References 8 publications

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“…The performance evaluation of HV composite insulators has been extensively presented and evaluated [15][16][17][18][19][20]. The electrical and material properties of 15 years in-service 400 kV-polymer coastal insulators were assessed [15,16]. The material aging was evaluated using many techniques, such as visual observation, hydrophobicity analysis, EDX, and FTIR for materials characterization.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, the flashover test and leakage current (LC) monitoring techniques were used to evaluate the electrical performance of the insulator. Results revealed that the tested insulators suffered from the non-uniform aging on the surface of sheds and rods [16]. The non-invasive online monitoring techniques such as infrared and ultraviolet imaging, and heat propagation techniques were used to evaluate the polymer insulator performance [17].…”

Section: Introductionmentioning

confidence: 99%

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Performance Evaluation of 230 kV Polymer Insulators in the Coastal Area of Saudi Arabia

et al. 2020

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This paper investigates the technical performance of 230 kV field-aged composite insulators in the coastal region of Saudi Arabia. Two insulator samples removed from the 230 kV line after 20 years of service are assessed at KFUPM High Voltage Lab (KHVL). Different assessment techniques, such as visual inspection, contact angle, surface pollution severity, electrical withstand, and material characterization are utilized to evaluate the insulator performance. Equivalent salt deposit density (ESDD) and non-soluble deposit density (NSDD) techniques are used for the surface pollution severity measurements. Clear views of surface changes and surface hydrophobicity conditions are displayed. Scanning electron microscope (SEM), energy dispersive x-ray spectrometry (EDX), and Fourier-transform infrared spectroscopy (FTIR-IR) techniques are utilized for the material characterization. The visual inspection reveals small and big cracks in the insulator sheds. Hard breakable portion areas, many shed cuts, changed color areas, and whitish parts are visually noticed in the insulator surface. Such changes confirm the aging condition effect of the insulator units. Furthermore, the samples are subjected to laboratory clean fog tests to check the electrical performance of the samples. Informative results are given for the current condition and performance for the 20-years, fieldaged insulators. Additionally, the experimental results are presented for the rest of the insulator life period. Utilization of the existing line insulators has been evaluated. Finally, discussions and recommendations for the future handling of the insulators at the 230 kV line are highlighted.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of 230 kV Polymer Insulators in the Coastal Area of Saudi Arabia

et al. 2020

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“…During normal exploitation, the ageing process of the shed surface takes place unevenly [8,9]. Those areas that are exposed to more intense rainfalls and contamination deteriorate more quickly than the areas protected against direct contact with them [10].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Shape of Composite Insulators Housing on their Aging Resistance in presence of High DC Voltage and Clean Fog

Wieczorek¹

2018

ELECTROTECHNICAL REVIEW

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The increased interest in transmission of electricity by using high DC voltage forced the need to examine the ageing resistance of silicone rubber insulators exposed to high DC voltage. Under operating conditions, in the presence of a high DC voltage due to electrostatic phenomena is observed even a fourfold increase in the accumulation of contaminants on the surface of the insulator compared to the high AC voltage. Lack of crossing zero values by current and voltage curves favors to the maintenance of surface discharges concentrated especially in the presence of water. In the paper tests results of the model composite insulators with different inclination of upper surface sheds in the clean fog chamber under high DC voltage is described. The aim of the research is to recognition of degradation ageing process of composite insulators electric properties and the phenomena of leakage current development. Laboratory test results allow to inference about the influence of the shape and design parameters of sheds on the behavior of the silicone composite insulators in operation. (). Streszczenie. W artykule przedstawiono wyniki rozkładów napięcia na połączonych w łańcuch izolatorach: kompozytowym na 110 kV i pojedynczym izolatorze kołpakowym pokrytym warstwą silikonu RTV. Zasymulowano zmianę właściwości powierzchniowych izolatorów w czasie eksploatacji. Stwierdzono, że dołączenie do izolatora kompozytowego niewielkiego izolatora ceramicznego, powleczonego silikonem RTV, w istotny sposób łagodzi występującą na izolatorze kompozytowym nierównomierność rozkładu napięcia. Wpływ kształtu osłon izolatorów kompozytowych na ich odporność starzeniową w obecności wysokiego napięcia stałego i czystej mgły

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Study on the influencing factors of natural degradation of liquid silicone rubber used for external insulation

Chen

Yifeng

Jia

et al. 2013

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

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Characterization of field-aged 400 kV silicone rubber composite insulators

Cited by 7 publications

References 8 publications

Performance Evaluation of 230 kV Polymer Insulators in the Coastal Area of Saudi Arabia

Performance Evaluation of 230 kV Polymer Insulators in the Coastal Area of Saudi Arabia

Influence of the Shape of Composite Insulators Housing on their Aging Resistance in presence of High DC Voltage and Clean Fog

Study on the influencing factors of natural degradation of liquid silicone rubber used for external insulation

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