摘要
在覆冰季节,输电线路重冰区段的光纤复合架空地线(optical fiber composite overhead ground wire,OPGW)易发生因覆冰后应力过载导致的光纤断裂事故。覆冰已严重影响重冰区段的OPGW光缆安全运行。针对既有线路,可采用对OPGW(地线)绝缘化改造后,通过直流融冰消除覆冰。以国网凉山公司110 kV雷坝二线N56至N80重冰区段OPGW(地线)为研究对象,在已有OPGW绝缘化改造直流融冰研究成果基础上,对包含OPGW(地线)直流融冰回路、绝缘段感应电压计算、接地方式、地线绝缘子选型在内的关键技术问题进行了研究。目前,采用所研究成果实施的N56至N80重冰区段OPGW绝缘化改造工程已完成。在2018年冬季至2019年春季,已对该线路绝缘改造区段OPGW开展直流融冰4次,融冰效果良好,线路运行正常。对该线路OPGW(地线)绝缘改造涉及到的关键技术说明可供后续OPGW绝缘化改造参考。
Optical fiber composite overhead ground wire(OPGW)located in heavy icing area of transmission line is likely to suffer fracture accident caused by stress overload when icing in winter.The icing has a strong impact on safe operation of OPGW in heavy icig area.The method of DC de-icing using insulation reconstruction is adopted to eliminate the ice covered on OPGW.Based on the existing research results,taking N56~N80 OPGW,which is in heavy icing area belonging to 110 kV Leiba II line of State Grid Liangshan Power Supply Company,as the research object,the relevant simulation and calculation,including DC de-icing circuit,induced voltage,grounding mode,selection of insulator and insulation reform method for different types of towers,are illustrated.Using the obtained conclusions,the insulation reconstruction project for N56~N80 OPGW of 110 kV Leiba II line has been completed.DC de-icing has been carried out four times from December of 2018 to January of 2019 which has a good de-icing effect,and the line is operating normally.The insulation reconstruction method of OPGW can provide a reference for the subsequent projects.
作者
邓元实
廖文龙
陈俊
朱军
李昆
刘凤莲
陈少磊
卜祥航
Deng Yuanshi;Liao Wenlong;Chen Jun;Zhu Jun;Li Kun;Liu Fenglian;Chen Shaolei;Bu Xianghang(State Grid Sichuan Electric Power Research Institute,Chengdu 610041,Sichuan,China;State Grid Sichuan Electric Power Company,Chengdu 610041,Sichuan,China;State Grid Liangshan Electric Power Supply Company,Xichang 615000,Sichuan,China)
出处
《四川电力技术》
2019年第3期44-49,共6页
Sichuan Electric Power Technology
关键词
光纤复合架空地线
绝缘化改造
直流融冰
optical fiber composite overhead ground wire(OPGW)
insulation reconstruction
DC de-icing
