Effect of Dew and Raindrops on Electric Field around EHV Transmission Lines

Budi Utama, Asniar Aliyu

Abstract


This paper analyses the change of electric field in the proximity of 500 kV extra high voltage (EHV) transmission lines, in the presence of raindrops and dew. The computations were carried out using MatLab software by solving the electrostatic equations. The analysis depicts that the spatial distribution of the electric field strength varies with water droplets content along the lateral distance along the transmission line. The peak electric field reduces with the water droplets   content,   whereas   the  electric field  remains   the  same  at around  36 m   from  the transmission line. Then onwards the field strength increases with the water droplets content. At long distances the field strength is not affected by the water droplets. Such variation is highly important to analyse the adverse effects on the insulators used in HV applications. The results are of high significance to a country such as Indonesia where the precipitation levels are generally high in most parts of the country. 


Keywords


Dew-droplets; electric field; transmission lines; EHV (Extra High Voltage);

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DOI: http://dx.doi.org/10.12928/telkomnika.v16i3.5408

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