Abstract Sudden ice shedding from three-phase iced eight-bundled transmission lines with inverted-triangle arrangement was numerically and experimentally modeled. The staggered-arrangement groups and compact-arrangement groups (including triangular and V-shaped structures) of interphase spacers were considered to investigate the inhibition effects on ice shedding. Based on the similarity theory, a modification method was proposed to determine the natural frequency similarity between model and prototype. According to the dynamic tension, interphase distance, and jumping height, the reduction rate of dynamic tension, interphase-distance ratio, reduction rate of jumping height, and comprehensive reduction rates were determined for different arrangements of the interphase spacers. The inhibition effects of different factors on ice shedding were discussed for different lines, including the position and number of transmission lines for the ice-shedding phase and the various possible arrangements of interphase spacers. Deicing schemes for the different line configurations were proposed, and the best arrangement of interphase spacers was selected for each case. The present study provides a theoretical foundation for selecting an appropriate arrangement of interphase spacers during ice shedding.

中文翻译：

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相间垫片对三相冰冻八束输电线路脱冰影响的研究

摘要 对倒三角形布置的三相结冰八束输电线路突发冰脱落进行了数值模拟和实验模拟。考虑相间间隔物的交错排列组和紧密排列组（包括三角形和V形结构）来研究对冰脱落的抑制作用。基于相似性理论，提出了一种确定模型与原型之间固有频率相似性的修正方法。根据动态张力、相间距离和跳跃高度，确定了不同相间间隔物排列的动态张力降低率、相间距离比、跳跃高度降低率和综合降低率。讨论了不同线路的不同因素对脱冰的抑制作用，包括脱冰阶段传输线的位置和数量，以及相间间隔物的各种可能布置。提出了针对不同线路配置的除冰方案，并为每种情况选择了相间间隔物的最佳布置。本研究为在冰脱落过程中选择合适的相间间隔物布置提供了理论基础。