Guangdong mechanical processing plant optical fiber communication has the advantages of large communication capacity, small attenuation, no fear of lightning, anti electromagnetic interference, anti-corrosion, good confidentiality, high reliability, convenient laying and so on. However, the investment cost is relatively high, especially for the optical fiber laying of directly buried cable lines in urban areas, the construction cost will be higher.
Implementation scheme of optical fiber communication in distribution network of Guangdong mechanical processing plant
The networking mode of optical fiber communication is very flexible, which can be constructed into star, chain, tree, mesh, single fiber network, double fiber network, multi branch on ring, multi ring intersection, multi ring tangency and other topological structures.
According to the characteristics of distribution automation system in Guangdong mechanical processing plant, the optical fiber network usually needs to form a ring network and connect with computer LAN to realize data sharing. In practical engineering design, fully considering the complexity of power communication network topology, SDH transmission system can adopt the design idea of 126 E1 (2m port) full cross connection and double main optical ring + multiple optical branches. The basic architecture is one to three SDH / STM-1 dual fiber self-healing rings intersecting or tangent, and can be upgraded to SDH / STM-4 online by replacing the optical card when necessary. If the local area network of the dispatching center is located in the geographical center of the network, it is suggested to design a tangent ring with the dispatching center as the tangent point; If the local area network of the dispatching center of the Bureau deviates from the geographical center of the network, it is suggested to design an intersecting ring. Because the dispatching center is not at the intersection, in order to reliably transfer between rings, each ring intersects at least two points, which are mutually protective routes.