| With the continuous development of the research on the information physical system of the smart grid,the problem of the reliability of the low voltage power line carrier communication has attracted more and more attention.Power line carrier communication technology uses power line as communication medium.Due to the shared and open characteristics of the power line,the carrier communication process will be affected by the power network environment.Therefore,it is of great significance to study the reliable network method of power line carrier communication.Firstly,this paper selects the power information collection system,which is for the purpose of power data perception as an example,to analyze the structure of low-voltage power network and noise environment.Then,based on the two port network of the circuit,the influence of the line parameters,impedance matching,multipath effect on the signal transmission process are analyzed,and the widely used carrier channel multipath transmission model is introduced.Then,the topology of low-voltage power network is summarized,and several commonly used methods of carrier routing are introduced.In view of the shortage of clustering routing algorithm,this paper starts from the mechanism of low bit rate carrier communication,and establishes the weighted network reliability analysis model based on the equipment signal-to-noise ratio as the weight.Based on the concept of minimal connected dominating set in graph theory,a power line carrier routing algorithm based on minimal connected dominating set is proposed to improve the reliability of CPS communication in power grid.Simulation results show that,compared with the clustering method,this method can achieve different scale carrier network construction,and under the same channel conditions,the network average bit error rate is significantly reduced,which plays a role in improving the reliability of the CPS communication network. |
PDF Full Text Request