Matching Optimization And Networking Method Of Power Line Carrier Communication Network In Distribution Network

With the rapid development of intelligent distribution network and distribution automation technology,fast,economic and efficient communication technology of distribution network has gradually become the internal demand of the development of distribution network.Power line communication(PLC)has become an important choice of communication technology of distribution network due to its unique advantages.But the power line carrier channel is complex and changeable,the actual distribution network topology structure,line characteristics and parameters,load structure and parameters and other factors change may give PLC technology in the distribution network matching optimization and network application brings difficulties.This paper is to study the matching optimization and networking method of power line carrier communication network in dis tribution network.The main work of this article is as follows:(1)In the network mode,two PLC network region division methods are proposed.In the first method,the coordination balance between network transmission gain and matching economic index is co nsidered comprehensively.The region division problem is modeled as a 0-1 integer programming problem based on WP-NMEI under nonlinear multi-constraint conditions,and the optimal solution of distribution network relay node establishment is obtained by using improved genetic algorithm to complete the region division.The second method is based on the communication quality of the network link,the construction of the communication quality matrix P_W of the network link is completed,and a region partition met hod based on P_W matrix is proposed.A large complex distribution and communication network is divided into several small matching area networks by setting up reasonable relay nodes.(2)Based on the actual structure of the distribution network,the impedan ce matching relationship between two nodes in the PLC network is deduced,and the power coordination between each subordinate carrier is verified.Then,the complex distribution communication network is partitioned according to the proposed method,and the impedance of each communication node in the same matched regional network is adaptive optimized and coordinated by using chaotic particle swarm optimization algorithm.After the optimiz ation process of the intelligent algorithm,the parameters of the opti mized nodes need to be adjusted to match the unit.The effectiveness of the method is proved by MATLAB simulation and laboratory test.(3)Combining with the topology example of distributi on network,an adaptive matching networking method of distribution n etwork carrier communication system under network mode is proposed.The communication quality matrix of distribution network link is constructed.According to the matrix elements,the regi onal network is divided and the relay nodes are selected to complete the preliminary network formation.In order to improve the attenuation characteristics of the channel and increase the transmission capacity of the channel,the parameters of the impedanc e matching unit of the corresponding nodes are adjusted according to the results of the adaptive impedance matching optimization between the nodes.After the network matching is completed,the communication quality matrix of network links is updated,and the preliminary networking results are revised,so as to ensure the communication reliability and reduce the transmission delay,so as to achieve strong and reliable networking.