青藏联网中高性能OPGW的研制与应用

青藏地区高海拔、极端低温、巨大温差的恶劣自然环境严重影响光纤复合架空地线（optical fiber composite overhead ground wire,OPGW）的损耗特性,并且威胁其长期安全稳定运行。为此,介绍在青藏直流联网工程中应用的高性能OPGW。该OPGW采用SMF-28 ULL超低损耗光纤及耐超低温纤膏研发定制而成,在-55 ℃低温环境下仍有良好的损耗特性,成功应用于翻越唐古拉山脉、距离长达295 km的世界最高海拔超长站距光纤通信系统。高性能OPGW的成功研制与应用,为青藏直流联网通信系统长期安全稳定运行奠定了坚实的基础,为后续工程建设积累了宝贵经验。

Development and Application of High-Performance OPGW in the Qinghai-Tibet DC Power Transmission Interconnection Project

The Qinghai-Tibet plateau’s odious natural environment of high altitude, extreme low temperature and great temperature difference has severe impact on the loss characteristics of OPGW, and threatens its long term safe and stable operation. This paper introduces the ultra high-performance OPGW used in the Qinghai-Tibet DC transmission interconnection project. Customized by the use of SMF-28 ULL fiber and low temperature resistant optical fiber ointment, the OPGW has low loss characteristics in the ultra low temperature of -55 ℃ and has been successfully used in the world’s highest ultra long-span optical fiber communication system which crosses over the Tang-ku-la Mountains with a distance up to 295 km. Application shows that the OPGW can operate stably in the poor natural environment of plateau area. The development and application of ultra high performance OPGW provides a good foundation for the long term safe and stable operation of the communication system of the Qinghai-Tibet DC transmission interconnection project and valuable experiences for similar projects in the future.