激光技术对架空线路塑料薄膜异物处理特性的研究

he foreign body of plastic film at overhead lines is one of the biggest threats at present for the stablity of power supply and the security of power grid. The traditional treatments of foreign bodies at overhead lines are different degrees with high operation difficulty, safety risk and high economic cost. Because of its advantages such as no contact, high speed and high accuracy, laser technology has great potential in the treatment of foreign bodies at overhead lines. Based on CO2 laser, fiber laser and semiconductor laser, the characteristics of foreign bodies treated by laser are studied. First of all, the transmissivities of different types of lasers with different colors, different thickness of plastic film are measured, and the comparisons of the actual melting effects by different types of laser on plastic film are tested; Secondly, by experimental measurements and theoretical calculations, the least penetration power density of plastic film and the power loss rate of fiber laser are estimated. Finally, considering the aerosol's influence to laser's transmission in atmosphere, and there is a close relationship between the humidity and the formation of the aerosol, so the influence of humidity on laser transmission at atmosphere has been researched.