The first single-wavelength 400G DWDM ultra-long-distance transmission link in my country’s power sector has been built in Xinjiang
On May 6, State Grid Xinjiang Power, together with State Grid Information and Communication Company, State Grid Economic Research Institute, China Electric Power Research Institute, Wuhan Optical Network Company and other units, successfully completed the construction of the first single-wavelength 400G wavelength division system ultra-long-distance relay-free transmission link in the domestic power sector on the 750 kV Bayingol-Lop Nur section optical cable line, achieving stable operation of a transmission distance of 355 kilometers, marking an important step in the evolution of power communication networks towards ultra-large capacity, ultra-high speed, and ultra-long distance integration.
With the accelerated construction of the modern energy system, the digital and intelligent transformation of the power grid is imperative. At present, 10G-rate SDH and 100G-rate OTN networks at all levels can no longer meet the future panoramic video surveillance, panoramic data collection, computing network construction and other large-capacity power business carrying needs. Building a new generation of ultra-large capacity optical networks with higher capacity, higher speed and higher efficiency has become the key to supporting the construction of modern energy systems and new power systems. Unlike the telecommunications industry, the State Grid Corporation of China has a large AC and DC power grid with UHV as the backbone. The optical cable has the characteristics of large station distance and wide application of OPGW. It faces key technical challenges such as ultra-long distance optical path performance optimization in the application of 400G wavelength division technology in power.
In order to overcome the ultra-long distance and large capacity transmission problems faced by the power communication network, State Grid Xinjiang Electric Power has joined hands with many units of the State Grid system to actively explore innovative technical paths. After a year of technical research, the project team successfully built a large-capacity ultra-long-distance optical transmission system model based on high-order Raman, and optimized key technologies such as optical power balancing and nonlinear effect suppression. By superimposing 100 kilometers of test optical fiber on the Lop Nur side, the maximum 31-wave 400G optical transmission link was successfully realized at a distance of 355 kilometers. All indicators of the system meet the requirements of optical path operation.
The successful pilot application of this transmission link will significantly improve the transmission performance and business carrying capacity of the power communication backbone network, and provide stronger support for the construction of a new power system.
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