Six-year Trial of an HV Overhead Line Wide-bodied Composite Insulator

Rowland, S. M.; Cotton, Ian; Peesapati, Vidyadhar; Chambers, D.; Zachariades, Christos; Shang, Yingqiang

doi:10.1109/tdei.2020.008857

Cited by 7 publications

(14 citation statements)

References 16 publications

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“…The air pollution concentration is reasonably periodic, but the occurrence of rainfall is rare. The latter observation aligns with previous reports [12], [24], [34], [35], [36], [37].…”

Section: Research Results and Discussionsupporting

confidence: 93%

“…Referring to [40], the maximum air pollution concentration ranged between 24 µg/m 3 Rain rarely occurs, yet it was relatively intense between 12:00 and 19:00. This rainy condition is consistent with that of previous studies [12], [24], [34], [35], [36], [37]. Specifically, the rain was intermittent, and there was difficulty in predicting the rainfall intensity, which was from 0 mm/h up to 28 mm/h, and even peaked at 77 mm/h.…”

Section: B Leakage Current Recording Datasupporting

confidence: 91%

“…Specifically, the rain was intermittent, and there was difficulty in predicting the rainfall intensity, which was from 0 mm/h up to 28 mm/h, and even peaked at 77 mm/h. Nevertheless, most of the time was either without rain [12], [35], with 0-2.1 mm precipitation being very rare [35], and 0 mm up to 0.4 mm rainfall [36] and 0-1.3 mm/minute rainfall intensity [37] also having been observed. The rain was not the same for every day and every month: 0 mm up to 4.8 mm and 0 up to 18.3 mm rainfall for two months [34].…”

Section: B Leakage Current Recording Datamentioning

confidence: 99%

“…The leakage currents of the insulators increased as the humidity [12], [13] and rainfall [12], [14] increased. Moreover, the increasing exposure duration caused the leakage currents to rise [1], [12], [13], [15], [16], [17], [18], [19], [20]. Nevertheless, this exposure decreases insulator resistance and weathering due to long-term ultraviolet exposure [4].…”

Section: Introductionmentioning

confidence: 99%

“…These pollutant levels determine flashover voltages [5], [10], [11]. The leakage currents of the insulators increased as the humidity [12], [13] and rainfall [12], [14] increased. Moreover, the increasing exposure duration caused the leakage currents to rise [1], [12], [13], [15], [16], [17], [18], [19], [20].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Influence of Mounting Incline and Natural Environmental Factors on Pin-Type Silicone Rubber Insulator Leakage Currents Using Internet-Based Monitoring

Waluyo,

Putra

2023

IEEE Access

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High-voltage insulators are essential components in overhead transmission and distribution lines. Various environmental factors and probable mounting inclines may influence the performance of insulators. Therefore, it is necessary to continuously and simultaneously investigate these influences using an internet-based data-logging system. Here, the test samples were vertical, thirty-degree, sixty-degree, and horizontal mounting inclinations on 7.5 kV-subjected pin-type silicone rubber (SiR) insulators. The recorded data included 7,917 measurements acquired every five minutes for a month and then analyzed using statistical tools. At midday, the surrounding environmental temperature, illuminance, and ultraviolet (UV) radiation reached their peak values, whereas the humidity reached its lowest value. The air pollution concentration reached its highest levels in the morning, and rain rarely occurred. The insulator leakage currents reached their top values before dawn and their lowest values at midday. Originally, the typical highest leakage current was the vertical mounting insulator, which reached 1.36 up to 2.36 times that of the remaining insulators; the maximum and maximum typical values were 24.27 µA and 4.9 µA, respectively. Increasing illuminance, UV radiation, and temperature influenced the leakage currents to decrease, but the corresponding leakage currents rose as the humidity, air pollution concentration, and rainfall increased. Based on extrapolations of the data, the vertical mounting insulator is the most vulnerable installation for severe air pollution concentrations, reaching a predicted warning condition of 287.2 µg/m 3 . However, the horizontal mounting insulator is the least suitable for rainfall above 16.86 mm. The typical shortest forecasted warning condition is 10.3 years on the thirty-degree mounting insulator.INDEX TERMS Environmental factor, inclination, insulator, leakage current, silicone rubber (SiR).

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“…The air pollution concentration is reasonably periodic, but the occurrence of rainfall is rare. The latter observation aligns with previous reports [12], [24], [34], [35], [36], [37].…”

Section: Research Results and Discussionsupporting

confidence: 93%