中文摘要：

冰灾引发的输电线路覆冰事故严重危害电力系统安全稳定运行,尤其是电力通信地线的覆冰事故,可能造成供电、通信中断等危害,因此,提高地线融冰技术是关键。本文提出一种复合光纤架空地线新型交流融冰法,具有感应电压低、无功小、融冰电源设备成本低、操作方便等优点,适用于受灾的复合光纤架空地线（OPGW）耐张段间覆冰线路的融冰,局部针对性融冰确保线路耐压耐热要求,减小融冰耗能。所提出的OPGW结构采用漆包线绕制无感双绞线取代铝包钢中心线作为加热源。设计制作实验样品,并进行裸导线加热升温实验以及OPGW融冰实验。基于热路法,建立等效热路模型,进行温升计算及Matlab仿真,实验结果和计算结果基本吻合,初步验证新型OPGW结构交流融冰的可行性。

英文摘要：

Ice depositing on transmission lines is of great danger to the security and stability of electrical power system. Especially the ice accidents of the electric power communication ground wires may cause power outage and communication interruption. So,to improve the melting technology of ground wire is of great significance. A new AC ice-melting method for Optical Fiber Composite Overhead Ground Wire（ OPGW） is proposed,which has advantages of low induced voltage,small reactive power and low cost supply power as well as convenient operation. It is applied to partial line ice-melting,which can ensure the voltage and heat requirements and reduce the energy consumption. The new structure of the new OPGW chose a twisted bifilar wire fabricated by enameled wire as a heater for de-icing by replacing the aluminum-clad steel wire in the central layer. After a sample was fabricated,temperature rise of bare conductor and de-icing tests with ice depositing on its surface were performed respectively.On the other hand,an equivalent thermal circuit was established according to the simplified thermal resistance model by which the temperature rise of conductor was separately calculated and simulated by Matlab software. The simulated results are in good agreement with the experimental ones,which preliminarily validates the feasibility of the new structure for de-icing.