The Application And Research Of Adaptive OFDM Technology In The Low Voltage Power Line Carrier Communication

In order to establish an economic,reliable and sustainable power system,we need to improve our power grid technology,among which intelligent communication network is one of the key technologies.As a result,it is crucial to construct communication net in the intelligent power system.First of all,the background and significance are described in the scope.The newest develop trends of the low-voltage power line carrier communication technology are introduced both domestic and abroad.The structure and content of this thesis are described in brief.The significances in alleviating pressure of energy and ensuring reliability of power supply by intelligent communication network are also discussed.Secondly,the research tools which be used in this paper are explained in depth.The basic theory of signal modulation and signal processing is introduced.The basic ways of modulation(adaptive)is written summarily Whereas OFDM technology and the principle is mainly introduced.Thirdly,the thesis focuses on establishing low-voltage power line communication.The detail of the transmission characteristic is introduced.It is also completely illustrated for its features.Then,the load analysis and model establishment are created.Between the FIR model and AR model,signal amplitude frequency characteristics and signal attenuation are studied.The conclusion is that multi-path channel model is close to the actual power line carrier channel.Finally,the application of adaptive technology in the remote automatic statements was studied.The auto-mark report system communication module and the simulation parameters are set for the low voltage power carrier communication.With the power line carrier communication technology and computer networking being combined,the scope of the reporting applications is expanded without time and space constraints.Residential l customers can find at any time of their own electricity consumption.The paper focus on the transmission rate of the carrier communication major technical indications.This error rate parameters was tested by analyzing the data.The higher the error rate may be,thelower the success rate of communication is.This situation indicates that the effect of communication is bad.The transmission rate of carrier communication is faster in the test,which is up to 10Mbit/s or more.A test is designed to certificate the feasibility of long-distance automatic statements and reports system using low communication module wattage power line communication.