The optical fiber composite overhead ground wire(OPGW)is a research hotspot of intelligent transmission technolo-gy.Its freezing conditions are closely related to the stable operation effect of power grid,and DC deicing technology is an im-portant breakthrough.In this paper,a supercritical DC dynamic deicing model is designed for the sudden freezing environment.The influencing factors of()PGW supercritical DC deicing are obtained,the dynamic temperature evaluation system is estab-lished,and the heat exchange effect is evaluated through simulation experiments.The results show that under the sudden freez-ing environment,the heat exchange coefficient in the middle of the ice layer has a great influence on the freezing breaking effect,and the deicing effect is related to factors such as temperature,air velocity and ice temperature difference.The factors affecting OPGW ice melting current are the same as the above factors.The current can increase with the expansion of tempera-ture difference and air velocity,but the influence factor of ice thickness on ice melting current is low.Therefore,in practice,the ice melting current should be dynamically adjusted according to the above factors.
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