Application and research of laser de-icing in power system

Icing threatens the safety and reliability of power system. The existing de-icing methods cannot fully guarantee the safe and reliable running of the power system because of various defects. The laser de-icing technology is a new non-contact and portable method, which can effectively remove the ice adhering to high voltage transmission lines and other electrical devices, so it has a wider applied prospect than many other methods. In this paper, we demonstrate and analyze the feasibility of laser de-icing technology, and introduce an independent research and development semiconductor laser de-icing system with 980 nm in wavelength and 300 W in maximum output laser power. This system overcomes the shortcomings of exiting carbon dioxide laser de-icing system, such as big size, heavy weight and poor efficiency. It adopts the series-parallel connection of laser diodes and multiplexed output mode to increase the output laser power. And it makes use of collimating lens to improve the collimation of laser. Therefore, it can get rid of the icing safely and effectively under the circumstance of power system running. On the base of the experimental results, we establish the model of laser de-icing and calculate temperature field and stress field by finite element software to inspect the effect of laser de-icing and obtain the best theoretical parameters of the system. Specific requirements of choosing reasonable parameters are given by simulation, which are of great significance to the application of laser de-icing.