Research Of The Backbone Communication Network System In China Southern Power Grid

Power system communication network is one of the private communication networkswith large and comprehensive development in our country. Power communicationincreasingly shows its importance in the wake of improvement of network modernization anddeepening of market reform. In order to meet the new needs of the Power Supply, ChinaSouthern Power Grid has been taking a series of measures step by step, including a number oftrunk and regional network communication engineering projects, to build high-speed, largecapacity and ultra-long span optical transmission digital communication networks. Comparingwith traditional optical transmission systems, ultra-long span Fibre Optical CommunicationSystems are characteristic of direct end to end routing without any fiber optic amplifiers orrepeaters, so as to eliminate the need of power supply stations, and thus reduce theconstruction and operating cost. Especially for the ongoing construction of long-spanultra-high-voltage transmission, the Repeaterless Fibre Optical Communication Systems caneffectively reduce the number of repeaters in the routings through the no man’s land, thuslargely cutting down the construction and maintenance costs of repeater stations.This paper focuses on the research of the backbone communication network system inChina Southern Power Grid. The current situations and hidden shortcomings of power systemcommunication network in China Southern Power Grid are analyzed in the beginning of thispaper. The large number of repeater power supply stations result in low reliability and highconstruction and operating cost. In order to reduce the number of repeater power supplystations, the optimum proposals of ultra-long span Fibre Optical Communication Systems arepromoted in this paper. Revolving around the optimum proposal, several key technologies arediscussed, including the Super Forward Error Correction (FEC), Erbium Doped FiberAmplifier (EDFA), Raman Fiber Amplifier (RFA), Dispersion Compensation Fiber (DCF) andChirped Fiber Grating (CFG). The optimum proposals are tested and verified in two opticfiber cables of the backbone communication network system in China Southern Power Grid.The first one is the cable between LuoPing Converting Station and BaiSe Converting Station,which belongs to the Network A. And the other cable between HeZhou Converting Stationand LuoDong Converting Station belongs to the Network B. The test results show that thepromoted proposals are reasonable and reliable.