Ultra-low loss and ultra-low temperature OPGW (optical fiber composite overhead ground wire) and production method thereof

Abstract

The invention relates to an ultra-low loss and ultra-low temperature OPGW (optical fiber composite overhead ground wire) and a production method thereof, which are particularly applicable to remote large-capacity low-loss EHV (extra-high voltage) long-distance power transmission networks, and can be used in the filed of communications in various severe environments with high elevation, severe lowtemperature, dry and changeable and windy weather and the like. The OPGW comprises ultra-low loss fibers, G652D fibers, low-temperature fiber paste, first stainless steel tubes, second stainless steel tubes, internal high-strength aluminium sheathed steel wires and external high-strength aluminium sheathed steel wires; the inside of the first stainless steel tube is provided with the ultra-low loss fibers and uniformly filled with the low-temperature fiber paste so as to form a first stainless steel fiber unit; and the inside of the second stainless steel tube is provided with the G652D fibers and uniformly filled with the low-temperature fiber paste so as to form a second stainless steel fiber unit; the first and second stainless steel fiber units are synchronously stranded with the internal aluminium sheathed steel wires and uniformly daubed with the fiber paste; the external high-strength aluminium sheathed steel wires are stranded at the outer layer of the obtained product, and thus a double-layer armored ultra-low loss and ultra-low temperature OPGW.

Description

technical field [0001] The invention relates to an ultra-low loss, ultra-low temperature OPGW optical cable and its production method, which is especially suitable for long-distance, large-capacity, low-loss UHV long-distance power transmission network, and can be used for high altitude, low temperature and cold, dry and complex climate Communication fields in various harsh environments such as changeable, windy and sandy environments. Background technique [0002] With the successful operation of the 1000kV Jindongnan-Nanyang-Jingmen UHV AC test demonstration project with a transmission distance of nearly 700km, China has built the transmission line project with the highest voltage level, the highest technical level, and the strongest transmission capacity in operation in the world. China has made a major breakthrough in the long-distance, large-capacity, low-loss UHV core technology, and is at the forefront of the world. With the construction of more UHV AC and DC transmi...

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Problems solved by technology

[0007] (4) At present, there is a lack of an OPGW optical cable suitable for the OPGW optical cable line of the Qinghai-Tibet ±400kV DC interconnection project

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