Research On Short Distance Wireless Communication Network Technology In Substation Environment Monitoring System

In recent years,with the construction and development of smart grid,short distance wireless communication technology has been widely concerned,and has become one of the hot spots in the field of electric power communication.Short distance wireless communication technology can achieve the final "hundreds of meters" access,which has great development potential and broad application prospects.Substation environment monitoring system is an important part of the power system,which can realize real-time monitoring and intelligent control of substation field operation parameters,and operation analysis of the collected monitoring information.This will greatly improve the automation level of substation auxiliary equipment safe operation,reduce the accident rate of equipment and emergency repair time,it is of great significance to ensure the safe,reliable and stable operation of power network.According to the existing optical fiber network,industrial Ethernet,field bus and other means of communication are not perfect,and the short distance wireless communication technology can achieve flexible access to the current situation,this paper mainly studies the short distance wireless communication network technology in the substation environment monitoring system.On the one hand,it is difficult for power monitoring points to form a connected sensor network,and to ensure the safe production of electric power,it should take into account the real time performance;on the other hand,due to the complex electromagnetic environment of the substation environment monitoring system,it is more vulnerable to various attacks and interference compared with the general network,in order to make the network continuously and reliably,we need as much as possible to improve the network survivability to ensure the reliability of the network.This article has carried on the research to the above question,firstly analyzed and summarized the existing short distance wireless communication network in the realization of network connectivity and solutions to improve network survivability aspects,that is not suitable for environmental monitoring system in substation.Secondly,a relay deployment algorithm based on the shortest path is proposed for the problem of network connectivity,it first determines the representative nodes of each partition,and then deploys relay nodes along the shortest path from representative nodes to the central one,where the deploy direction could be adjusted if the coverage of one relay overlaps other one's.The simulation results have shown that compared with the relay deployment algorithm based on minimum spanning tree and FeSTA,the proposed algorithm has better performance in terms of the average number of communication hops.Then,in order to enhance the network survivability presents an optimization method for survivability strategy based on small world network,this strategy combines the topology optimization algorithm with the addition of super link.There will be some selective clustering coefficient smaller edge deletion,after adding deterministic super links,through weak important nodes to improve the performance of survivability.Finally,the simulation and analysis of experiments show the advantages of this strategy in the aspects of survivability.