Abstract：Ice accretion on transmission lines posts great threat to the operation of power grid. Various new methods and technical measures have been exploring to achieving anti-icing and de-icing of transmission lines. In this paper, self-heating rings made of ferromagnetic material are fixed on the conductor to achieve anti-icing without power outage. Exposed in the magnetic field and generated by the transmission current, strong magnetic field will be induced in self-heating rings and lead to magnetic heat loss for anti-icing. In this paper, the thermal power characteristics of the self-heating rings with different transmission currents are calculated by magnetothermal analysis. At the same time, the critical de-icing power of conductor with different wind speed and temperature conditions is calculated by analyzing the thermal conservation. Anti-icing test of LGJ-400/35 conductor with self-heating rings is performed in artificial climate chamber. The results show that self-heating ring can reduce the ice accretion on conductor obviously. There is no ice formed on the conductor where self-heating rings fixed. Furthermore, the total ice mass on conductor decreased 18.38%~30.61% in test condition. Therefore, for the transmission line in heavy icing areas, the use of self-heating rings is a simple and feasible way to preventing icing disaster.
黄亚飞, 蒋兴良, 任晓东, 黎芷毓. 采用涡流自热环防止输电线路冰雪灾害的方法研究[J]. 电工技术学报, 2021, 36(10): 2169-2177.
Huang Yafei, Jiang Xingliang, Ren Xiaodong, Li Zhiyu. Study on Preventing Icing Disasters of Transmission Lines by Use of Eddy Self-Heating Ring. Transactions of China Electrotechnical Society, 2021, 36(10): 2169-2177.
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