Research On Ultra-Long Haul Transmission In Erodes Power Grid

Power optical fiber communication transmission has a unique application scenario: the fiber cable is located above the power tower.Long single-span and non-regeneration optical fiber communication system does not need the relay station,which can reduce the maintenance cost significantly.The national economic construction half rapidly increased in recent years.The regional power grid construction also steps into a new era,which is no longer running separately,all the power grids are connected together.As an important part of the power grids interconnection,UHV power grids and DC transmission engineering facilities have been fully completed.In addition to revolution in the UHV transmission technology,the relevant power grid supporting technology has also got great breakthrough,such as the power communication technology.Ultra-long haul optical fiber communication has also got great breakthrough.It is the key technology in high-voltage transmission.Ultra-long haul transmission technology has become a research direction of scholars.The breakthrough in the related technology can increase the construction speed of national high-voltage transmission network.Long single-span optical fiber communication technology is the key part in the planning and design process.This paper firstly made some theoretical analysis,then analyzed the factors which can impact the 2.5G and 10 G ultra-long distance transmission,such as the fiber loss,dispersion tolerance,nonlinear effects,and so on.The transmission system are virtualized into several modules.By modularizing the transmission system,the design process is simplified.The designers and maintenance personnel can use the method easily.Based on the theoretical analysis results,the paper designs a 4-wave carrier system which is suitable for mixed traffic,such as 2.5G,10 G,GE,SDH,OTN.Then,the design scheme are verified by simulation and field test.Several key test items have been touched,such as the long-term bit error rate,throughput.The test results show that the performance meet the requirements of the universal long-haul transmission.At last,the paper also studied the ultra-long non-regenerated system.The paper finds that: an attenuator can be added in the transmit part.This can decrease the ASE noise and non-linear effect.This can increase the OSNR and Q value margin.The simulation result shows 0.3dB performance improvement.The research results have important practical value.This can decrease the regeneration station,which can greatly decrease the communication room requirement and power consumption.In the end,it can decrease the investment cost.