Research of Deicing Processes by Means of Electrodynamic Method

Abstract

The article deals with the problem of deicing of power line wires. Routine methods of power line wire deicing are notable for low energy efficiency and long time needed for wire’s cleaning. Research objective consists in model-based studying of power line wire’s deicing process by means of electrodynamic method. In the article, a short review with the reference of disadvantages of existing power line wire’s deicing methods are described. An electrodynamic method, based on combined effect on ice layer, is outlined. A short description of mathematical model used at the investigation process is shown. The model allows to calculate the parameters of three parallel sub processes of deicing: melting of a thin ice layer on the “wire-ice” boundary, destruction of ice coating on separate fragments and shaking off the fractured ice coating elements by inertial forces. Three cases were considered during investigation. The relationship between the required pulse ratio during change of thickness of the melted ice layer, and pulse size at different ambient temperatures is defined. The relationship between length of cracked ice cylinder fragment and ice coating thickness and size of pulses supplied to the line is defined. The energy consumption for clean-up of the line by electrodynamic method is defined. This energy consumption is compared with energy consumption of ice melting. The results of numerical experiment are shown and conclusions are made.