Research On Network Optimization Of Railway Electric Power Telecontrol System

The number of power stations connected to the Guangzhou-Shenzhen railway dispatching system has been growing recently,and the amount of data traffic carried by the communication network for the railway power supply dispatching system is growing year after year.This is due to the system’s continuous improvement.The railway operation and maintenance staff must offer a communication network with high reliability and security in order to guarantee the stability,security,and real-time performance of the railway power supply dispatching system.In this thesis,the fault condition and the three-year-long development of the Guangzhou-Shenzhen Railway power teleoperation system are combined to examine the network’s current state.It is discovered that the increasing flooding demand of routing nodes,the restriction of 2 Mbps bandwidth on service traffic forwarding,and the unauthorized entry of external traffic to alter the network configuration are the main causes of frequent failures.This thesis studies and combines the topological structure of the entire network with the OSPF dynamic routing protocol and PPP link protocol,analyzes the aforementioned three issues,and provides an optimization strategy based on local conditions: This thesis proposes an optimization strategy for area planning,DR and BDR election,and route summary for the first problem,starting with the computation and optimization of the OSPF database and routing table.In order to address the second issue and reduce service data traffic,this thesis suggests an optimization strategy based on interface cost optimization routing and VJHC data header compression.This thesis approaches the third issue from the perspective of protocol authentication and suggests the CHAP link authentication negotiation and SSH remote authentication optimization schemes.Testing and verification are required after choosing the optimization strategy.Other tests can be validated by the field equipment in addition to the LSA flooding test,which has an impact on network stability and has to be performed by an e NSP simulation.The test results demonstrate that in the optimized network,LSA flooding in the whole network is successfully controlled when the network topology changes,and the database size and routing table size of each routing node are effectively reduced.In contrast,the sub-station ring network distributes traffic in accordance with a predetermined route selection,thereby ensuring network security.It is possible to illustrate the viability and efficacy of the optimization scheme to address the current issues with the Guangshen Railway power telekinetic system through the analysis of field and simulation test data,and it also has some reference value for addressing issues with other relevant scenes in the industry.