Abstract
Atmospheric icing is a main nature disaster that threats the safety of Zhangbei flexible HVDC transmission lines, especially when overload icing and ice shedding occur. This paper conducts a nonlinear finite element analysis of a three-span insulator-conductor coupled model, to study the static and dynamic response of the iced flexible HVDC lines, in terms of conductor tension, unbalanced horizontal tension and jump height. The influence of ice thickness, ice shedding amount, span length and height difference are studied and the different response of polar conductor, metal returning conductor and the ground wire are compared. Then, conclusions are drawn and useful suggestion for improving the reliability of flexible HVDC transmission lines in cold regions are proposed.
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