Achieve Technical Research On Power Grid Micropower Wireless Communication System

In recent years,micro-power wireless communication technology has gradually become a core technology in the field of smart meter reading.As micro-power wireless communication technologies provided by domestic technology companies have their own intellectual property rights,the software and hardware implementation programs of modules as well as network access tests are kept confidential.This poses a serious obstacle to the large-scale construction of the smart grid by the State Grid.Therefore,State Grid Beijing Zhixin Microelectronics Technology Co.,Ltd.commissioned a new generation of broadband mobile communication terminal system team at Chongqing University of Posts and Telecommunications to develop a system prototype that meets the grid-related standards,and pass the network test.It is beneficial for Zhixin Company to realize the industrialization of smart meter modules so as to realize the full integration of domestic smart grids and promote the large-scale construction of domestic smart grids.The technology of micro-power wireless communication system is divided into three parts: software development,node module hardware design and test verification.These three parts will be studied in this thesis in turn.1.For the characteristics of micro-power wireless communication systems,the overall architecture of the system software design is given in this thesis,and a detailed study of the protocol stack,embedded operating system,and other software function modules is made.2.The hardware design of the node module mainly includes interface circuit design,baseband circuit design,power management,wireless communication unit design,and antenna design.Theoretical analysis,simulation and specific implementation methods are adopted by this thesis to guide the design of each part of the hardware,and finally complete the hardware design of the central node module and the sub-node module.3.The test and verification of the node module is completed by the measurement center of the State Grid Jibei Academy of Electric Power.The test is mainly divided into three parts: module performance test,protocol conformance test and network test.From the measurement results returned by the measurement center,it can be seen that the node modules studied and designed in this thesis meet the requirements of the national grid standard and the design is reasonable.From the perspective of engineering implementation,the central node and sub-node modules of the micro-power wireless communication system are completely designed and verified by the measurement center test.