OPGW临界融冰电流及其影响因素

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Abstract Atmospheric ice accumulation on the optical fiber composite overhead ground wire (OPGW) may affect the safe and stable operation of power grid.The DC ice-melting technology is one of the effective measures to prevent the occurrence of the icing accident of the OPGW.A DC ice-melting model for the OPGW is firstly established.And then the dynamic temperature characteristics of the OPGW during the ice-melting process are calculated.Based on the model,the critical ice-melting current is calculated and its factors are analyzed.The ice-melting experiments carried out in the multi-function artificial climate chamber show that the model in this paper is valid and practical.Both the calculated results and tested results show that the heat exchange coefficient on the ice outer surface has a great effect on the ice-melting process and it is closely concerned with the ambient temperature,the wind speed,the ice thickness,and the temperature of ice outer surface.Therefore,the critical ice-melting current of OPGW is related to the ambient temperature,the wind velocity,the ice thickness,and the type of OPGW.The critical ice-melting current increases with the decrease of the ambient temperature and the increase of the wind velocity.Under the same environment condition,the critical ice-melting current increases with the increase of the ice thickness,but the impact of the ice thickness is relatively small.Therefore,the DC ice-melting current must be chosen according to the environmental conditions.

Key words： Optical fiber composite overhead ground wire (OPGW) critical ice-melting current ambient temperature wind velocity ice thickness

Received: 10 April 2015 Published: 07 July 2016

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TM852

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	Jiang Xingliang
	Meng Zhigao
	Zhang Zhijin
	Yao Shiying

Cite this article:

Jiang Xingliang,Meng Zhigao,Zhang Zhijin等. Critical Ice-Melting Current of Ice-Covered OPGW and Its Impacting Factors[J]. Transactions of China Electrotechnical Society, 2016, 31(9): 174-180.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I9/174

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