Load-aware And Fault-tolerance Routing Building Algorithm For Power Distribution And Utilization Communication Network

As an important part of the smart grid,the power distribution and utilization communication network is mainly responsible for the automation operation,monitoring and alarming,and the collection of electricity information.It is the key to improve the quality of power supply and the experience of electricity users.With the development of the grid,there are many communication methods in the power distribution and utilization communication network,with the fiber communication as the main method and the wireless communication as the supplementary method.With the increasing number of smart terminal devices and the increasing type of services,there are many shortcomings in the routing mechanism of communication network.The centralized computing and control center cannot meet the requirement of processing massive data at the edge of the network.Therefore,it is of great theoretical and practical value to study how to improve the stability and load-balance capability of the routing mechanism,and improve the quality and the efficiency of data transmission.As one of the research directions of the next generation network,the Content Centric Network(CCN)is proposed to supplement and optimize the traditional network communication method.The idea of content-centric communication in the CCN architecture will be the prospect of future network development.The reasonable introduction of this architecture will effectively improve the problems of low transmission efficiency and heavy network load.Meanwhile,in wireless communication scenarios,the wireless sensors have limited energy and are easy to fail.In addition,the information transmission in WSN is closely related to the use of the grid,which has the peak periods and the valley periods.The existing routing mechanisms take little account of the network structure,node characteristics,working features,and so on.On the basis of ensuring normal communication,they are supposed to reduce the energy consumption and prolong the lifetime of the network.Therefore,in view of the shortcomings in the existing research,this paper studies the routing mechanism of the distribution network.The main contributions of this paper are concluded as below:(1)In the view of the low transmission efficiency and heavy load in the wired network scenario,we propose a load-aware routing mechanism,LAPBR(Load-aware Potential-based Routing),based on edge computing and potential energy.LAPBR combines the CCN in the power distribution and utilization communication network.In LAPBR,we introduce the "potential",the concept in physics to construct the node potential model according to its requesting information.The potential model is used to evaluate the load of the node.Then we construct a dynamic potential field model covering the entire network.Through the periodical update and solution of the potential field,the nodes in the network can spread congestion information automatically.During the data transmission,one node will not transport the packet to another node with heavy load.On the edge network,the routing is load balancing.The simulation results show that LAPBR improves the capability of load sense and the ability of routing decision.It can reduce network latency and optimize network transmission performance effectively.(2)Aiming at the problem that the sensor nodes are easy to be invalid in the wireless communication scenario,a self-adaptive and fault-tolerant dynamic clustering routing mechanism,SAFT(Self-adaption and Fault-tolerance),is proposed.Based on the typical application scenarios in the distribution network of the microgrid,the energy model and lifetime model of nodes and networks are constructed to quantify the performance of them.The dynamic clustering mechanism is designed.The size of the cluster depends on the status of nodes and the network.We also introduce the advanced Particle Swarm Optimization(PSO)algorithm to find the optimal routing solution.The path of transmission comprehensively considers the energy,the communication distance and other factors.For the possible failure conditions in the network,we give the corresponding and quick solutions.The simulation shows that the routing algorithm extends the lifetime of nodes and networks effectively.SAFT improve the rate of correct data transmission and enhance the stability and robustness of the network.