Power QoS Routing Optimization And Communication Center Selection Based On Node Importance

The power industry is ushering in a critical period of comprehensive implementation of high-quality development,while the current communication network still has many shortcomings in its support capabilities.Firstly,the power backbone communication network has problems such as untimely information transmission and slow route convergence,which affect the security and stability of the power grid.Secondly,the distribution communication network as an access network brings together a large amount of new energy data and traditional distribution operation information,and its working efficiency depends on the centralized processing and unified deployment of the communication center,so optimizing the location of the center will help improve the operation capacity of the distribution network.At the same time,the nodal and modular characteristics of the power system are becoming more and more prominent,so it is urgent to study power communication optimization taking into account of the node characteristics,to ensure the capability of the communication network.Based on the background above,this paper firstly defines the importance of nodes by integrating the node topology influence and grid influence;then,on the basis of fully considering the node characteristics,two important techniques of backbone network routing optimization and distribution network communication center siting optimization are studied respectively for the problems of backbone communication network and access network,and the main work of the paper is as follows:Aiming at the problems of slow route convergence and poor service QoS(Quality of Service)performance of the power backbone communication network,this paper proposes a QoS routing model considering node importance,packet loss rate,delay and cost.In order to solve the routing efficiently and quickly,this paper proposes an improved ant colony algorithm.The algorithm embeds the importance in the model through state transfer and adaptive search convergence control.This can guide the optimization direction of the ant colony and achieve fast optimization.The algorithm also introduces a parameter knowledge model to study in the iteration.This can select the most suitable parameter combination for the ant colony and reduce the parameter sensitivity of the algorithm.The simulation proves that the routing algorithm based on node importance can converge quickly and provide reliable and stable primary and backup routing for backbone network communication services.To solve the problem that the information in the distribution power network lack of processing and deployment,this paper proposes a model for selecting the location of the communication center considering the balance of node importance and the probability of normal operation of optical fibers in the network.The paper firstly adds the access of new services such as electric vehicles to the node importance portrayal,and then incorporates the balance of network node importance distribution into the target model,to alleviate the problem of uneven importance distribution and increased network risk caused by center location;secondly,considering the impact of fiber optic cable failure on communication,this paper proposes a mathematical model based on the shortest path for the site location to affect the probability of normal operation of the fiber in the network,which refines the impact of fiber reliability.The simulation proves that the site selection strategy of this paper balances the importance distribution of nodes in the network and ensures the normal working probability of fiber is maintained at a high level,which makes the information service of communication center more reliable.In summary,in order to improve the support capability of the communication network for power system,this paper studies the related optimization technologies of the power backbone communication network and the distribution communication network on the basis of considering the node characteristics,which has certain reference value for the construction and research of current power communication network.