Multi-node Broadband Low Voltage Power Line Channel Modelling And Its Implementation

As a kind of economical,convenient and efficient communication technology,the high-speed broadband power line carrier communication technology has attracted great attention in the energy Internet,industry 4.0 and Internet of Things.At the same time,multicarrier OFDM technology and MIMO technology has applied to the PLC which make its vitality and value immense.The communication performance of the MIMO system,such as diversity combining algorithm or the routing of the information node in the power network are susceptible to the interchannel correlations,however there is still a lack of study in channel correlation for low-voltage broadband PLC.In addition,the existing PLC communication performance testing scheme based on programmable attenuator and wiring distribution cabinet seems to be unitary,resulting in the unnormative PLC testing standards.Grid topology,cable transmission characteristics and load impedance characteristics play an important role in power line channel fading characteristics and its interchannel correlations.Therefore,this thesis aims at providing an effective multi-node power line channel model with interchannel correlation,frequency response calculation method,and a unified channel simulation platform,in order to provide a useful reference for the research on future novel high-speed broadband PLC technology and the related PLC testing standards.Firstly,the fading,impedance and noise characteristics of low voltage power channel are discussed in the thesis by the theory of power line transmission line.And the three classic power line channel models are summarized.Based on the dual port model and the bottom-up method,the interchannel correlation is respectively analyzed by theoretical derivation and measurement and its generation mechanism is briefly given.For a known grid topology,the frequency response calculation method of multi-node broadband lowvoltage power line channel is proposed by the main path analytic method based on the shortest path algorithm and the branch line impedance updating mechanism based on the breadth-first search algorithm.Secondly,for providing a unified hardware communication test platform for PLC,the demand analysis of multi-node broadband low-voltage power line channel simulation platform is developed,and the configure module for FMC sub-board and multi-node power line channel model are designed by the FPGA technology with high real-time data processing and the system generator development platform with high efficiency DSP design.Besides,the framework and development process of the multi-node power line channel simulation platform are present in the thesis.Finally,this thesis introduces the application of multi-node power line channel simulation platform in the communication performance test for carrier module by means of the chip debugging tool.In order to provide a complete and effective power line network channel simulation environment,its widely testing application in other typical PLC scene and potentialities value in communication performance testing for PLC product,PLC chip and PLC Technology are explored.