Research on High Voltage Pulse Ice-Breaking Technology

Ice covering of transmission lines may cause mechanical damage to equipment, including fixtures, conductors, poles and towers, and even lead to serious accidents such as tripping of lines, power failure, burning of wires, and collapse of poles and towers. This paper presents a high voltage pulse ice-breaking technique. The high voltage pulse acts on the ice accumulation covering on transmission lines, breaking down the ice from the inside, forming a high pressure, high temperature plasma channel, and finally breaking the whole ice. In this paper, a high voltage pulse ice-breaking model is constructed based on the structural characteristics of typical transmission line glaze ice and the three-dimensional transient electric field simulation is carried out. The results show that under certain pulse excitation conditions, the bubbles in the ice will be broken down, and the closer the bubbles are to the ice surface, the easier the bubbles will be broken down. The electric field inside the bubbles has the same trend with time, and the electric field intensity increases uniformly with the increase of excitation intensity. This study can provide a reference for the research of power line energy saving and ice breaking.