Modeling leakage current of ceramic insulators subject to high pollution levels for improving maintenance activities

Castillo-Sierra, Rafael; Oviedo-Trespalacios, Óscar; Candelo, John E.; Soto, José D.

doi:10.15446/dyna.v85n204.61445

Cited by 8 publications

(22 citation statements)

References 29 publications

(41 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consequently, the increase in the temperature caused a decrease in the humidity, as well as in the leakage current. This result was therefore in line with [7][8][9]12]. Finally, Fig.…”

Section: Correlation On the Environmental Parameterssupporting

confidence: 86%

“…This phenomenon was in line with [8,12,20,24,[26][27][31][32][33] and implied in [34]. According to Castillo-Sierra et al [8] and Vosloo and Holtzhausen [17], the leakage currents were high and low at night and noon, respectively. Jiang et al [20] and Samakosh and Mirzaie [27] stated that the amplitudes of the leakage current waveforms rose as the humidity increased.…”

Section: Lc Variations Against Natural Humiditysupporting

confidence: 72%

“…Thus, the porcelain insulator is more susceptible to temperature influence than silicone rubber is. Visually, the insulator leakage currents decreased as the environmental temperature increased, and this phenomenon is in line with [8,12,17]. Castillo-Sierra et al [8] and Vosloo and Holtzhausen [17] stated that at noon the temperature rose with a decrease in the leakage currents.…”

Section: Lc Variations Against the Natural Temperaturesupporting

confidence: 56%

“…Visually, the insulator leakage currents decreased as the environmental temperature increased, and this phenomenon is in line with [8,12,17]. Castillo-Sierra et al [8] and Vosloo and Holtzhausen [17] stated that at noon the temperature rose with a decrease in the leakage currents. Wang et al [12] used exponential regressions with various constants to reduce the leakage currents as the temperature increased.…”

Section: Lc Variations Against the Natural Temperaturesupporting

confidence: 56%

“…In addition, the increase in UV radiation causes the temperature to increase [9,13,17] and the humidity to decrease [13,17]. Hence, increasing the temperature will reduce the leakage currents, which is in line with [8,12,17]. Fig.…”

Section: Lc Variations Against Natural Humiditymentioning

confidence: 77%

See 4 more Smart Citations

The Evaluation of Daily Comparative Leakage Currents on Porcelain and Silicone Rubber Insulators Under Natural Environmental Conditions

2021

View full text Add to dashboard Cite

In this research, the leakage current (LC) and applied voltage waveforms on samples of installed outdoor porcelain and silicone rubber (SIR) insulators were measured by using a storage digital oscilloscope concurrent with humidity, temperature, and illuminance measurements. Essentially, the measurements were conducted daily, every three hours, for thirty days, and the data were analyzed using exponential regressions, box plots, and correlation coefficients. The porcelain and SIR insulator leakage currents varied from 23.7 A to 28.8 A and 8.4 A to 10.35 A for median values, respectively, while for outlier excluded values, they varied from 20.3 A to 40.0 A and 5.1 A to 17.1 A, respectively. Both leakage currents slightly increased as the exposure duration of the insulator rose, while the ratio decreased very slightly. Additionally, the leakage currents decreased moderately and slightly as the temperature and illuminance increased, respectively. However, the parabolic leakage currents increased as the humidity rose, especially at high humidity. Therefore, the porcelain insulator was more susceptible than the daily SIR, while the SIR insulator was more highly influenced by aging of the exposure duration. The rainy condition contributed to the highest leakage currents on both insulators, whereas the drizzle condition contributed to the highest leakage current on the SIR insulator. The total harmonic distortion (THD) and phase angle of the porcelain insulator leakage currents experienced differences of 5.8% and 7.8 degrees in the minimum and maximum humidity, respectively, but both quantities were less for the SIR insulator. INDEX TERMS humidity, leakage current, porcelain, silicone rubber I. INTRODUCTION High voltage outdoor insulators have an important role in electrical power transmission and distribution systems, including operational reliability, safety, and efficiency [1]. However, their functions are mostly influenced by environmental conditions [2-3]. Common insulator materials include glass and porcelain, which are ceramic materials that have been used for hundreds of years. Moreover, composite and cast cycloaliphatic epoxy resin (epoxy resin, ER), as a polymeric category, has been used in the last few decades [3-4]. These insulators have sheds for reducing the electric field stress and tolerating the accumulation of pollution [5]. Currently, research conducted on insulator leakage currents based on daily time functions is limited. Vosloo et al. [6] illustrated the average peak leakage currents on some insulators, and Roman et al. [7] monitored the insitu dc leakage current magnitudes, namely, rain, humidity, and temperature, on composite and glass insulators. According to Castillo-Sierra et al. [8], the ceramic insulator leakage currents were measured using a clamp meter, as were the temperature and humidity, followed by a regression analysis. Further research by Vosloo and Holtzhausen [9] showed that the peak leakage current of porcelain insulators, including precipitation, relative humidity (RH), ul...

show abstract

“…Consequently, the increase in the temperature caused a decrease in the humidity, as well as in the leakage current. This result was therefore in line with [7][8][9]12]. Finally, Fig.…”

Section: Correlation On the Environmental Parameterssupporting

confidence: 86%