光纤复合架空地线光缆站端两点接地研究  

Analysis of Optical Fiber Composition Overhead Ground Wire Adopting Two-Point Grounding at the Station Side

作　　者：李留文 胡家琪 向川 Li Liuwen;Hu Jiaqi;Xiang Chuan(Lijiang Power Supply Bureau of Yunnan Power Grid Co.,Ltd.,Lijiang,674100,China;Electric Power Research institute of Yunnan Power Grid Co.,Ltd.,Kunming,650217,China)

机构地区：[1]云南电网有限责任公司丽江供电局,云南丽江674100 [2]云南电网有限责任公司电力科学研究院,云南昆明650217

出　　处：《云南电力技术》2022年第1期74-77,83,共5页Yunnan Electric Power

摘　　要：光纤复合架空地线光缆(Optical Fiber Composition Overhead Ground Wire,OPGW)是在高压输电线路中、利用避雷线与光缆两重作用合一的一种复合型通信光缆。线路运行时,OPGW上会产生感应电压,遭遇雷击时,会产生雷击过电压。当电压过高有可能引起OPGW地线闪络,也会通过OPGW光缆引入厂站,危及人身及设备安全。通过在进入场站处构架顶端、下端固定点(余缆前)用匹配的专用接地线实现可靠两点接地,能够有效解决该问题,理论仿真分析结合现场工程应用验证了方法的有效性。Optical Fiber Composition Overhead Ground Wire(OPGW)is a kind of composite communication cable in high voltage transmission line,which contains lightning conductor and optical cable.When the line is in operation,induced voltage will occur at the OPGW.When struck by lightning,the lighting overvoltage will appear.The OPGW ground cable may flashover if the voltage is too high,and will be introduced into the plant and station through the OPGW optical cable,endangering personal and equipment safety.The problem can be effectively solved by using the matching special grounding wire to realize the reliable two-point grounding at the entrance of the station,i.e.at the fixed point of the top and bottom(before the remaining cable)of the frame.The effectiveness of the method is verified by theoretical simulation analysis and field engineering application.

关 键 词：光纤复合架空地线光缆 雷电 感应电 两点接地 

分 类 号：TM74[电气工程—电力系统及自动化]