Mechanism of Saline Deposition and Surface Flashover on High-Voltage Insulators near Shoreline: Mathematical Models and Experimental Validations

Muhammad Majid Hussain, Muhammad Akmal Chaudhary and Abdul Razaq
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Muhammad Majid Hussain: Faculty of Computing, Engineering and Science, University of South Wales, Treforest, Cardiff CF37 1DL, UK
Muhammad Akmal Chaudhary: Department of Electrical and Computer Engineering, Ajman University, Ajman P.O. Box 346, UAE
Abdul Razaq: School of Design and Informatics, Abertay University, Dundee DD1 1HG, UK

Energies, 2019, vol. 12, issue 19, 1-20

Abstract: This paper deals with sea salt transportation and deposition mechanisms and discusses the serious issue of degradation of outdoor insulators resulting from various environmental stresses and severe saline contaminant accumulation near the shoreline. The deterioration rate of outdoor insulators near the shoreline depends on the concentration of saline in the atmosphere, the influence of wind speed on the production of saline water droplets, moisture diffusion and saline penetration on the insulator surface. This paper consists of three parts: first a model of saline transportation and deposition, as well as saline penetration and moisture diffusion on outdoor insulators, is presented; second, dry-band initiation and formation modelling and characterization under various types of contamination distribution are proposed; finally, modelling of dry-band arcing validated by experimental investigation was carried out. The tests were performed on a rectangular surface of silicone rubber specimens (12 cm × 4 cm × 8 cm). The visualization of the dry-band formation and arcing was performed by an infrared camera. The experimental results show that the surface strength and arc length mainly depend upon the leakage distance and contamination distribution. Therefore, the model can be used to investigate insulator flashover near coastal areas and for mitigating saline flashover incidents.

Keywords: saline mechanism; shoreline; wind speed; outdoor insulators; dry band arcing; flashover (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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