Protective coatings for improving contamination performance of outdoor high voltage ceramic insulators

Gorur, R.S.; Cherney, E.A.; Tourreil, C. de; Dumora, D.; Harmon, R. W.; Hervig, H.; Kingsbury, B. E.; Kise, J.; Orbeck, T.; Tanaka, Kyoji; Tay, Roland Yingjie; Toskey, G.A.; Wiitanen, D.O.

doi:10.1109/61.400837

Cited by 67 publications

(17 citation statements)

References 8 publications

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“…One of the best methods to improve an insulator's insulating property is to cover the insulator surface with a thin layer of RTV silicone coating [13,14]. Inorganic fillers are used in the silicone rubber to enhance the thermal conductivity, the resistance to relative permittivity, and the electrical conductivity.…”

Section: Semiconducting Rtv Silicone Rubbermentioning

confidence: 99%

Reducing Ice Accumulation on Insulators by Applying Semiconducting RTV Silicone Coating

Liao

Jia

Guan

et al. 2007

IEEE Trans. Dielect. Electr. Insul.

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Ice accumulation on high voltage insulators can cause accidents by flashover across the ice-covered insulators. The ice accumulation can be reduced by changing the insulator surface properties by application of a semiconducting RTV silicone coating. This method is based on the hydrophobicity and semiconductivity properties of the coating. The mechanism for reducing ice accretion is analyzed theoretically. Experimental results are presented to validate the effectiveness of the semiconducting RTV coating at reducing ice on insulator strings. The results show that the coating on the insulators delays ice formation and reduces the amount of ice.

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Section: Semiconducting Rtv Silicone Rubbermentioning

confidence: 99%

Reducing Ice Accumulation on Insulators by Applying Semiconducting RTV Silicone Coating

Liao

Jia

Guan

et al. 2007

IEEE Trans. Dielect. Electr. Insul.

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“…In previous studies, 1,5,12 the hydrophobic surface coatings, such as greases or RTV coating, were applied onto the porcelain insulators to improve the contamination performance. These hydrophobic coatings present a higher resistance to leakage current because they can prevent the formation of water film on the insulator surface and therefore lead to a higher flashover voltage than that of a conventional porcelain insulator under contaminated and humid conditions.…”

Section: Resultsmentioning

confidence: 99%

“…Although periodic cleaning is an effective countermeasure to prevent the insulators from contamination flashover, it is an expensive and time‐consuming procedure. Moreover, there is no way to predict when cleaning is actually needed 12 …”

Section: Introductionmentioning

confidence: 99%

A Novel Application of Nano Anticontamination Technology for Outdoor High‐Voltage Ceramic Insulators

Zhuang

Liu

Dai

et al. 2010

Int J Applied Ceramic Tech

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A novel application of a nano-sized titanium dioxide (TiO 2 ) photocatalyst for improving the performance of the ceramic insulator under contaminated conditions is proposed in this paper. The TiO 2 -coated insulator was prepared by spraying a certain amount of TiO 2 sol on the ceramic insulator followed by subsequent calcination. The physical and chemical properties of the TiO 2 film were studied and their influences on the self-cleaning and electrical performances of the ceramic insulator were evaluated. Compared with the uncoated insulators, the as-prepared TiO 2 -coated insulator exhibited an enhanced self-cleaning ability in a heavy polluted environment because of the excellent photo-induced catalytic performance of the TiO 2 film. Moreover, the TiO 2 -coated insulators presents a flashover voltage level similar to normal ceramic insulators, and even a higher performance of wet flashover than the latter. It was proposed that the semiconducting property and the hydrophilicity of TiO 2 films could be responsible for the promoting effect on the electrical performances of the porcelain insulator. This study shows that coating TiO 2 films on the surface of insulators may have a promise in preventing pollution flashover.

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“…The existing measures have taken different directions. One of the oldest techniques to avoid the pollutant buildup has been to coat the insulators with materials having low surface energy [8]. Historically, oil reservoirs [9] were used to wet the insulator surface with oil to prevent the contaminants from sticking to the insulator surface.…”

Section: Flashover Monitoring: Related Workmentioning

confidence: 99%

“…Therefore, most of the companies adopt periodic cleaning procedure [8] of the insulators to prevent accumulation of foreign particles on them. However, these methods are not cost effective.…”

Section: Flashover Monitoring: Related Workmentioning

confidence: 99%

Flashover monitoring system using wireless sensor network

Al-Absi

Baroudi

Al-Soufi

et al. 2014

2014 IEEE International Conference on Power and Energy (PECon)

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Flashover of insulators in transmission and distribution electric power systems causes a reduction of the system reliability and costly outages for the power company and their customers. In this paper, we present a system in which a wireless sensor network is used for continuous wirelessly monitoring contamination in high voltage insulators. The new system consists of different sensor nodes (e.g. humidity, temperature and dust) mounted on a dummy insulator that has to be placed close to high voltage substation or transmission line tower. The proposed approach is based on the Equivalent Salt Deposit Density (ESDD) severity method in order to check the pollution level on the insulator and to correlate with flashover voltage levels of the insulator string. In this approach, the photons measurement level (i.e. light intensity) is adopted as an indicator to the accumulated pollution level on the insulators. Extensive lab tests were carried out using different pollutants. ESDD measurements have been collected for all the pollution tests performed in the lab and a relationship between these values and the light intensity values has been established to correctly model the contamination level. Using, the established relationship between EESD and light intensity shall enable the power system control unit to accurately predict the flashover and accordingly schedule its crew to visit the site and clean these insulators. Index Terms--Flashover, High Voltage Insulator, Transmission Line Monitoring, Wireless sensor networks (WSN).I.

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Protective coatings for improving contamination performance of outdoor high voltage ceramic insulators

Cited by 67 publications

References 8 publications

Reducing Ice Accumulation on Insulators by Applying Semiconducting RTV Silicone Coating

Reducing Ice Accumulation on Insulators by Applying Semiconducting RTV Silicone Coating

A Novel Application of Nano Anticontamination Technology for Outdoor High‐Voltage Ceramic Insulators

Flashover monitoring system using wireless sensor network

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