Research Of Networking And Access Technology For Dual-model Communication Of Power Information Acquisition System

With the rapid development of smart grid,there are more and more demandings for communication reliability of the power information acquisition network.At present,the technology of power line carrier communication or micro power wireless is mostly used to build the power information acquisition network.In view of the complex power environment in China,it is difficult to break through the communication quality of the network and the success rate of data acquisition only using a single network communication technology in the power information acquisition network.Combined the characteristics of micro power wireless and power line carrier in field application,doing research on dual mode communication technology,which combines power line carrier and micro power wireless,can realize the complementarity of power line carrier and micro power wireless,which is of great significance to improve the communication quality of the network and improve the success rate of the meter reading.This topic is to do research of networking and access technology for dual model communication of power information acquisition.It does some analyses and researches on dual-mode communication architecture,hybrid network,hybrid routing addressing and channel access.The specific research contents are as follows:(1)Combined the communication architecture of power information acquisition and requirement analysis of network and access of power information acquisition,networking and access scheme of dual mode communication of power information acquisition are designed,and the key technologies involved in networking and access schemes are introduced.(2)Combined the distribution and access mode of power acquisition equipment,and the attenuation difference between the micro power wireless and power line carrier signal,it designs networking method of dual mode communication of power information acquisition.A dual tree network model of power line carrier and micro power wireless is proposed.It introduces how to build dual tree network and the maintenance process of dual tree network.(3)Combined the characteristics of power data and having built dual tree network,it designs access method of dual mode communication of power information acquisition.The data services are divided into channel correlation frame and channel non associated frame.It designs different channel decision methods for two frames.The channel access of dual mode communication of power information acquisition includes three stages,namely channel evaluation,hybrid routing addressing,and channel access.The test platform is built to test functions of dual mode communication of power information acquisition.By testing networking,hybrid routing addressing,evaluating channel and access,and meter reading,the results of which verify the ability of improving the communication quality and the success rate of data of dual mode communication of acquisition by using the method of networking and channel access of dual mode communication which is raised in this paper.