Analysis on Influence Factors of Ice-Shedding Unbalanced Tension of Transmission Tower- Line System

doi:10.11930/j.issn.1004-9649.201612014

Abstract

Abstract: Ice-shedding can cause sharp tension change of the conductor and produce greater tension differences, which can easily cause serious electrical or mechanical accident of transmission lines. Therefore, an ice-shedding vibration mechanical model of conductors is established by the finite element transient dynamic method to analyze the influence factors of ice-shedding unbalanced tensions and to reveal the influence characteristics of various parameters on the unbalanced tensions. The results show that the unbalanced tension of ice-shedding increases with the increase of icing thickness, ice-shedding spans, ice-shedding rates and height differences of mutation; the unbalanced tension of ice-shedding tends to stabilize with the increase of the number of continuous spans; within a certain span, the unbalanced tension of ice-shedding decreases with the increase of suspended insulator length; and different ice-shedding modes has significant impacts on the unbalanced tension. The related research results can provide a reference for the subsequent structure design and formulation of scientific and reasonable ice melting and deicing measures.

Key words: transmission line, icing, ice-shedding, unbalanced tension, numerical simulation, Influence factors

CLC Number:

TM753

HUANG Xinbo, XU Guanhua, XIAO Yuan, ZHU Yongcan, CHEN Guimin. Analysis on Influence Factors of Ice-Shedding Unbalanced Tension of Transmission Tower- Line System[J]. Electric Power, 2017, 50(11): 96-102.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201612014

https://www.electricpower.com.cn/EN/Y2017/V50/I11/96

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