Development of a New Type of Ice-Snow Resistant and Weather-Resistant Parallel Bunching Overhead Cable
In order to solve the problems of weak ice and snow resistance,insufficient bearing capacity and low mechanical strength faced by overhead lines in harsh environment,especially in the northern ice and snow environment,a new type of parallel bunched overhead cable with ice and snow resistance and weather resistance is designed.The high-strength parallel bunching structure and ice and snow resistance design are adopted.The cross-sectional design of the wire is a wing-like structure.The high-strength parallel bunching structure and ice and snow resistance design are adopted.The cross-sectional design of thewire is a wing-like structure.The insulation layer and the reinforcement form a tangential planar or micro-arc contact surface on the upper surface,and the heating element is embedded under the reinforcement,which effectively reduces the adhesion degree of the snow and ice on the wire and significantly improves the ice melting efficiency.At the same time,in view of the limitations of the circular conductor,the aluminum alloy shaped conductor and its processing technology are designed.Combined with the micro-compression stranding technology of the profile,the compression coefficient is increased to more than 97%,the outer diameter is reduced by about 5%,the cost savings of about 1.5%,and the tensile strength is increased by more than 30%,which significantly improves the comprehensive performance of the overhead line under complex conditions.The developed product provides an efficient,economical and durable solution for power transmission under complex geographic and climatic conditions,which is of great significance for improving the overall performance of overhead lines.
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