Study on the Amplification Factor of Ice‐Shedding Jump Height of Transmission Lines Under Ice–Wing Coupling

ABSTRACT

Ice accumulation on transmission lines poses a persistent threat to grid stability, yet precise technical guidance for the dynamic response during ice shedding under wind loads remains insufficient. In response to this issue, this study uses C++ to create a calculation program and obtains aerodynamic coefficients of ice‐covered conductors with crescent‐shaped cross‐sections through wind tunnel experiments. This study examines the effects of different simulation elements on ice‐shedding jump height and subsequent trajectory. Additionally, it analyses the dynamic response of conductors under various conditions of ice–wing coupling, establishing the relationship between amplification factors of the ice‐shedding jump height under near‐windless conditions. Field tests on different conductors were conducted to validate the findings, revealing an average calculation error of only 5.95%, thereby confirming the accuracy and applicability of the derived formula. This formula offers theoretical support for designing transmission lines in regions prone to heavy icing and high winds, and the proposed research approach is applicable to discussions of extreme operational conditions.